Ladies and gentlemen, thank you for standing by and welcome to the II-VI first quarter FY 2021 earnings call. At this time, all participants are in a listen-only mode. After the speaker's presentation, there will be a question-and-answer session. To ask a question during the session, you will need to press star one on your telephone. Please be advised that today's call is being recorded. If you require any further assistance, please press star zero. I would now like to hand the conference over to Ms. Mary Jane Raymond, Chief Financial Officer. Thank you. Please go ahead, ma'am.
Thank you, Marsha. Good morning. I'm Mary Jane Raymond, the Chief Financial Officer here at II-VI Incorporated. Welcome to our earnings call today for the first quarter of fiscal year 2021. With me today on the call are Dr. Chuck Mattera, our Chief Executive Officer, and Dr. Giovanni Barbarossa, our Chief Strategy Officer and the President of the Compound Semiconductor Segment. This call is being recorded on Thursday, November 5th, 2020. Our press release and our updated investor presentation are available on the investor relations tab of the website ii-vi.com. Just as a reminder, any forward-looking statements we may make today during this teleconference are given in the context of today only. They contain risk factors that are subject to change, possibly materially. We do not undertake any obligation to update these statements to reflect events subsequent to today, except as required by law.
A list of our risk factors can be found in our Form 10-K for the year ended June 30th, 2020, filed in August. We will also present some non-GAAP measures for which the reconciliations to GAAP are found at the end of each document that includes those measures, such as the press release or the investor presentation. With that, let me turn the call over to Dr. Chuck Mattera. Chuck?
Thank you, Mary Jane. Good morning, everyone, thank you for joining us today. I am pleased to report that our fiscal year 2021 started off very strong, led by demand at our Photonics Solutions segment. Despite the impact of our fully compliant reactions to the government orders against Huawei, we delivered revenue of $728 million at the midpoint of our guidance. Our consolidated revenue grew 114% year-over-year on a reported basis. Among the many highlights this quarter were sustained bookings that reflected expanding trends in all of our end markets. While the continued drive by our Compound Semiconductor segment to achieve a greater share of the consumer electronics market opportunity was evidenced by our tremendous growth in 3D sensing during the quarter, both sequentially and year-over-year.
In addition to a continued strong market pull and our firing on all cylinders, the main highlights of this quarter were our continued focus on the safety of our One II-VI family in the face of the pandemic, the successful completion of the first 12 months of our Finisar acquisition, and our rapid and agile response to the increased trade restrictions while successfully positioning II-VI to lead in the growth markets we have chosen to serve. September 24 was the 12-month anniversary of the largest and most bold transaction thus far in our history, the merger of two great companies into One II-VI. We brought together two incredible teams with best-in-class IP, technology, and manufacturing assets, leveraged our collective experience of integrating over 20 acquisitions prior to the Finisar acquisition, improved our ability to identify and execute on even large opportunities in the market at scale.
Our combined teams went right to work on September 24th, 2019, and collaborated with one another while aiming to over-deliver on the synergies that we envisioned when we started this historic journey, including addressing the dual challenges of declining revenues and margins that Finisar had begun to experience before the acquisition. I am pleased to declare that so far, so good, as we have together improved margins significantly over Finisar's last reported standalone margins by delivering synergies ahead of schedule and by increasing share and improving operational excellence. We have integrated the operations into our business management structure, driving accountability for performance throughout the company, while engaging a wide group of leaders in business management decision-making. We delivered $80 million of synergies compared to the first 12-month target of $35 million, and those synergies are detailed in today's investor presentation.
I would like to point out that one important derivative is our constant attention on productivity as our first 12-month pro forma revenues increased by 18%, while our headcount for the combined company decreased by 7.5%. During Q1, we also adapted to the new rules further restricting trade with Huawei, ensuring that we meet our goals of full compliance with laws and while serving our markets to the best of our ability. We delivered slightly ahead of our guidance at that midpoint. Continued good margins. We did ship all we had planned through September 14 and can still make some shipments on a more limited basis. We expect Huawei to move from being a less than 10% customer now to a less than 3% customer from Q2 to Q4.
I expect that our ability to identify and deliver on unbudgeted revenue synergies should allow us to fully mitigate the impact of the loss of that Huawei revenue to our fiscal year budget we set out to achieve. In fact, based on our customer intimacy, combined with our operational agility and speed, we expect to continue to serve the continued very strong communications end market worldwide, irrespective of how the value chain shifts. Data center and 5G demand both continue to be strong, and cable TV was also strong in the quarter as well. Additionally, our coherent modules and optical engines continue to gain market share with 30% quarter-over-quarter revenue growth. In addition to focusing on executing on our business and near-term operating performance, we are also continuing to plan our growth strategies as we look into the future of all of the markets we currently serve.
We are a technology company serving mega markets of today. We're also investing to lead in the service of mega markets of the future. As a result of our relentless pursuit of excellence and our balanced focus on short-term and long-term shareholder value, we established a new ventures group to ensure the right level of focus on important areas of growth, including silicon carbide for power and wireless applications. This new ventures group and its leader, Sohail Khan, are tasked with the important responsibility of working under the direction of our chief strategy and chief technology officers to identify market and technology opportunities and execute relentlessly. I'm extremely excited about the effort and humbled to have Sohail join our industry-leading team. We closed and began integrating our two new acquisitions, Ascatron and INNOViON, and look forward to their contributions to our ongoing success.
We are managing through the ongoing effects of COVID-19 on our supply chain. The challenges associated with this pandemic are not over by any means. Nevertheless, we've made great progress with our suppliers, with whom we are working around the clock to ensure the continuity of supply. The effect of the supply chain caused us to not be able to produce about $40 million of finished goods during Q1. At our own factories, our actions to ensure the health and safety of our employees continue undaunted, and we expect to remain vigilant around the world. Regarding our drive for diversification and the composition of the Q1 revenue, 50% was in North America, 22% in China, 19% in Europe, 6% in Japan, and the remainder in the rest of the world.
We've also worked hard on our customer and market diversification, and this quarter's results are a good example of our resilience. Our differentiated semiconductor laser platforms, engineered materials, and Compound Semiconductor platforms are valued highly by our customers worldwide. Irrespective of how market share of our customers may shift, we are well-positioned to serve increased demand for our products. Our manufacturing footprint is geographically diverse as well, and this too is by design. For example, our Compound Semiconductor device fabs are located in the United States, Switzerland, Sweden, and in the U.K. For component and subsystem assembly and testing, we are expanding our operations not only in China, but also in Malaysia, Vietnam, and in the Philippines. Our unique position in this regard in the photonics industry brings an unparalleled level of supply chain diversity and stability to our customers in the current geopolitical environment.
This is also true for our technology centers located in the U.S., Europe, China, Malaysia, and India. As we continue to move along the value chains, we will leverage our geographic options. Finally, let me say a word about our values of integrity, collaboration, accountability, respect, and enthusiasm that underpin our culture of doing things right and doing the right things. Taken together, they stand for I CARE, a powerful commitment of every employee that underpins the progress that we've seen in our business again this quarter. It's a reflection of the nearly 50 years of II-VI culture of integrity, pragmatism, professionalism, skill, and determination to succeed that's part of our One II-VI DNA that's embedded in world-class and worldwide technical and business professionals who think and act like owners.
While there's always much more to be done, I'm humbled and proud of the efforts, the speed of the progress we continue to make as we work together to build a company that's not only bigger and better, but to enable the world to be safer, healthier, closer, and more efficient, among the highest callings of this age. Finally, with the U.S. elections this week and Veterans Day coming up next week, I want to take this moment to thank all of our employees, our board members, and our shareholders who are veterans for your service. With that, I'll turn it over to our Chief Strategy Officer and President of the Compound Semiconductor Segment, Dr. Giovanni Barbarossa. Giovanni?
Thank you, Chuck. I'm pleased to report that 3D sensing grew more than 200% year-over-year and over 160% organically. We believe that this is significantly faster than the market growth rate. The combined company 3D sensing grew sequentially 20% for the second quarter in a row. Our Sherman fab, along with our other 3D sensing fabs, are operating as planned due to some very solid execution. We have recently secured multiple VCSEL design wins for Android smartphones and laptop applications, which will complement our existing design wins. Starting in 2016, we invested strategically in our own gallium arsenide epi, fab, assembly, and test operations in North America and Europe to create the worldwide first, and we believe only, vertically integrated VCSEL manufacturing operations on 6-in.
We did this with the conviction that it would have produced the results that we have been enjoying so far, and we believe we will continue to enjoy as 3D sensing functionalities are further deployed in the consumer electronics, automotive, and industrial market. In addition to shipping production quantities of laser for LIDAR sensing for smartphones, we have been shipping lasers for in-cabin automotive uses, such as driver monitoring and finger navigation for several years now from our fabs, which are also automotive certified. We expect these products to be increasingly required for Europe's five-star safety rating over the next three to five years.
As 3D sensing expands beyond smartphones into tablets, laptops, cars, and other products, we are poised to take advantage of those trends, not only with our Compound Semiconductor optoelectronic components, but also with our broad and market-leading portfolio of passive components, including diffractive optical elements, diffusers, filters, mirrors, and lenses. In fact, we expect these technologies to be used in the future for biosensing, as well as augmented, virtual, and mixed-reality applications. We delivered another great quarter in the communications market, where our business is split about 50/50 between the datacom and telecom segments, both of which continue to be strong. We believe that the acceleration of the world's digital transformation will continue to require investments in the data center infrastructure, driven by growth in artificial intelligence and machine learning, and by the advent of 5G wireless, which will enable next generation consumer applications.
We are in the early stages of this buildout. Revenues driven by the investment of cloud service providers are expected to continue to grow at a rapid pace each quarter. Long term, the datacom components and transceiver market could grow at a 17% compound annual growth rate over the next five years. Our goal is to grow faster than the market with our combined component capability in indium phosphide, gallium arsenide, and integrated circuits. We are very excited by the ongoing 200G and 400G deployment opportunities in the market. The importance of high-speed transceiver design cannot be overemphasized, especially with respect to the integration of lasers, electronics, and passive optics into the transceiver subsystem for high performance interoperability and reliability. Our vertical integration, combined with our decades-long history of design and manufacturing expertise, are critical success factors in achieving data rate increases at competitive performance.
Our 200G and 400G modules are currently shipping in volume to web scale customers and are being qualified at service providers and all major system OEMs. Our in-house optical and electronic component expertise and our proven track record to rapidly scale enables us to compete well in this long upgrade cycle. As the number one optical transceiver component and module manufacturer in the world, we are well positioned to grow our 200G and 400G module business while we continue to innovate in component technologies enabling next generation optical interfaces, including at 800G data rates. Upon closing our combination with Finisar, we successfully executed our strategy to become a merchant component supplier of technologies that were not previously marketed to external customers.
In Q1, our indium phosphide external component revenue nearly doubled from Q4, while we continue to support the internal demand, which we believe represents the largest captive volume in the industry. We are receiving great reviews from our external customers, and after just one year, we have a book-to-bill ratio greater than 4x. Aerospace and defense grew 5% sequentially and 25% year-over-year. We continue to see good growth in high energy lasers and contested space applications, and a great deal of advanced development in other strategic areas such as hypersonics. Irrespective of the outcome of the election, we believe that the long-term prospects for our aerospace and defense business are very strong, as they are based on our competitive portfolio of differentiated technologies and evolving geopolitical dynamics that mandate a modernization of the U.S. military assets.
Our silicon carbide business also had a great quarter, growing 50% compared to the same period a year ago. We are particularly excited as we have begun to increase our investments in the device and module markets. We've already formed a new organization to focus on the technical development as we close both the Ascatron and the INNOViON acquisitions, and added over 500 man-years of technical experience in device and module technology. Components for the semiconductor capital equipment market grew 11% compared to last year and were relatively flat sequentially. EUV was the major share of the growth, driven by both memory and logic market demand. According to reported news, there are today 75 installed EUV systems worldwide, with nearly 50 systems in backlog. Since 2018, more wafers were processed with EUV than from 2011 to 2017 combined.
We continue to have 1% of the value of the EUV system at the time of shipment, and another 1% in spares and replacement parts, generating a revenue stream that has already begun. In the industrial market, we are seeing a strong growth in China as the transformation of the Chinese economy resumes. We are seeing extreme pricing pressure as China focuses on its domestic infrastructure in the wake of a strong economy recovery post-COVID. This market relies on our components whether we make them inside or outside of China. Even as domestic production expands, we believe that we will remain a key supplier because of our leading-edge performance, which we have sustained over time through relentless innovation, and we expect to continue to do so.
In addition, we recently announced that our entire product line of high-power semiconductor lasers is now available on 6-in and is achieving economies of scale with volume shipments just in time to meet the rapidly growing and cost-sensitive demand for fiber laser pump chips. There are very few 6-in gallium arsenide wafer fabs for optoelectronics in the world, and II-VI already operates three fabs at scale, two in the U.S. and one in Switzerland. We believe we are the first and only company in the world to produce highly reliable, high-power pump lasers on 6-in, which complement our 3D sensing and datacom VCSEL production lines also on 6-in. Finally, our life sciences business grew 17% sequentially. II-VI's optical and thermal management solutions are integrated into several PCR test systems, which are the gold standard for COVID diagnostics with over 1 billion tests performed globally today.
We expect this need to continue to grow for the next three to four years as testing requirements become ubiquitous, and therefore, we're expanding our investment into life sciences, including the manufacturing capacity of high-performance optical filters in Santa Rosa, California, which continue to be sold out. With that, let me turn it over to Mary Jane. Mary Jane?
Thanks, Giovanni. Good morning. During the quarter, the total revenue of $728 million was split 70% in communications, 9% in industrial, 7% in aerospace and defense, 7% in consumer, 4% in semiconductor capital equipment, and the rest is in other markets. Let me review a few highlights of the first 12 months of the Finisar acquisition. The underlying inorganic growth for the Finisar business was 18% year-over-year on a pro forma basis in the September 30th quarter. As a reminder, pro forma refers to the full quarter of Finisar revenue in Q1 FY 2020, not just six days, so that we can show growth on a comparable basis. We are now delivering non-GAAP gross margins well above Finisar's last independently reported non-GAAP gross margin of 31%.
We delivered $80 million of cost synergies in our first 12 months when we expect to reach the $150 million target in 30 months instead of 36. We spent $32 million to achieve these synergies, less than half of our anticipated first-year spend. The one-year measurement period for purchase accounting for the acquisition ended on September 23rd with no significant changes from the June 30th position. With respect to consolidated II-VI, one year into the integration, we are already exceeding the last standalone legacy II-VI margins, the margins we last reported on June 30th, 2019. Our non-GAAP gross margin at that time was 38.2%, and the non-GAAP operating margin was 15.7%. As of today, the consolidated II-VI non-GAAP gross margin was 39.6% for Q1 of fiscal year 2021, 140 basis points ahead of our last independent report.
The non-GAAP operating margin for Q1 was 19.1% compared to our last independently reported 15.7%. At the segment level, the non-GAAP operating margins were 15.7% for Photonics and 26.4% for Compound Semiconductors. Compound Semi's margins improved from Q4 due to strength in 3D sensing shipments and increased fab utilization. Our backlog of $899 million consists of $533 million in Photonics and $366 million in Compound Semiconductors. The backlog contains orders that will ship over the next 12 months. Operating expenses, which are SG&A plus R&D, were $183 million in total, excluding the transaction cost of $2 million and $163 million, further excluding amortization of $20 million. The OpEx, 22.4% of revenue, over 500 basis points below the OpEx percent of the revenue. OpEx percent of revenue prior to the close of the acquisition when it was close to 28% for the two companies combined.
We had a successful public offering of $920 million, netting about $885 million. We retired the Term Loan B debt of $715 million, and we paid $25 million to the revolver in addition to our required quarterly payment of $17 million. Our outstanding debt at September 30th was $1.6 billion, net debt was $0.9 billion, and our net debt leverage ratio was approximately 1.3 x. The interest expense for the quarter was $17 million, and the write-off of the Term Loan B debt issuance cost was just under $25 million. Those costs are included in other income and expense. We delivered $100 million of free cash flow in Q1, paid $37 million for the Ascatron acquisition, and ended the quarter with a cash balance of $684 million, an increase of just over $190 million from the balance at June 30th, 2020.
Quarterly GAAP EPS was $0.38 and non-GAAP EPS was $0.84, with after-tax non-GAAP adjustments of $54 million in total. The share count for the GAAP results was 105 million shares. In Q1, neither the convertible debt nor the preferred stock were dilutive for GAAP. For non-GAAP, the share count was 123 million. Stronger earnings resulted in making both the convertible debt and the preferred stock dilutive. The investor presentation on the website presents the EPS calculations. They are also in the last two tables of the earnings release. For the rest of the year, we expect the convertible debt to be dilutive for GAAP and both the convertible debt and the preferred stock to be dilutive for non-GAAP EPS. Stock comp was $15.5 million.
Stock comp for fiscal year 2021 is expected to be about $68 million, or approximately $17 million a quarter, though this value may vary with our stock price. Capital expenditures this quarter were $34 million. For the year, we expect CapEx to be between $180 million and $220 million. Depreciation was $44 million in the quarter, and we expect our forward depreciation expense to be about $46 million -$60 million a quarter. The FX loss in the quarter was $4.7 million. The tax rate in the quarter was 22%. We expect the tax rate to be between 22% and 26% for the year. The tax rate to be used for non-GAAP items is 19%. The Ascatron acquisition closed on August 20th, and the preliminary allocation of purchase price accounting is included in the Q1 results.
INNOViON closed on October 1st and will be included in the results of the December 31st quarter. Both acquisitions will be consolidated into the Compound Semiconductor segment, and the revenue is immaterial for both for fiscal year 2021. Turning to the outlook. Revenue for the second fiscal quarter ended December 31st, 2020, is $750 million-$780 million, and earnings per share on a non-GAAP basis are $0.86-$0.95. This is at today's exchange rate, an estimated tax rate of 24%, and 124 million shares. For the non-GAAP earnings per share, we add back to GAAP earnings the pre-tax amounts of $21 million in amortization, $17 million in stock comp, and $2 million in transaction costs. The estimated Q2 share count is 116 million shares for GAAP and 124 million shares for non-GAAP.
The actual dollar amount of non-GAAP items, the tax rate, and the exchange rates are all subject to change. Before we go to the Q&A, just as a reminder, our answers today may contain forecasts from which our actual results may differ due to a variety of factors, including but not limited to changes in the product mix, customer orders, competition, changes in regulations, and general economic conditions. We would like to ask that each firm limit its questions to one question and one follow-up. We expect to conclude this call at 10:00 A.M. this morning. Marsha, you may open the line for questions.
Thank you, ma'am. As a reminder, to ask a question, you will need to press star one on your telephone. To withdraw your question, press the pound key. Please stand by while we compile the Q&A roster. Your first question comes from the line of Jed Dorsheimer with Canaccord Genuity.
Hi. Thanks, and congratulations on a quarter, as well as the integration of Finisar.
Thank you.
First question for you guys. I guess if I look at the silicon carbide business pre-Ascatron and INNOViON, I'm just curious, you had talked about sort of a five to 10 increase of capacity over the next five years. Has anything changed with respect to that? Is there an update on your thinking now that you have these assets in the business? Then I have a follow-up.
Hi, Jed. Thanks for your question. This is Giovanni. No, we see no change. We continue to increase our production capacity as required by the market. Those two acquisitions are complementary to the silicon carbide growth infrastructure that we have.
Got it. Thanks. Just as my follow-up, I was wondering if you could maybe talk about some of the differences in the 5G market from a technology perspective between China as well as the U.S. We're aware that there's differences in tower design and capabilities. What does that mean in terms of chip architecture? How are you positioned with respect to that? What I'm getting at is, does that, for example, shift in terms of a HEMT device in one market versus another? How should we be thinking about that as your product portfolio is set up?
Jed, this is Giovanni here. Thanks again for the question. When it comes to high-performance applications, such as in 4G, 5G, and eventually in the future 6G, it's all about physics. As far as we know, the performance that you can achieve with gallium nitride on silicon carbide can't be achieved with other material platforms. Of course, there are competitive technologies which are not mutually exclusive. We believe that our investment for gallium nitride and silicon carbide, together with our partner, Sumitomo Electric Device Innovations, continue to be a great opportunity for our growth. As you said, we do see differences between maybe China, some OEMs choices, and some other OEM choices in Europe. We also sell in the United States. For us, that's quite far from where we are at chip level.
As far as we see right now, we don't see any effect on our short and long-term plan.
Got it. Thank you.
Thank you, Jed.
Your next question comes from the line of Paul Silverstein with Cowen.
Thanks. Talking to you, Giovanni, I was hoping you could give some incremental color on the health of the comm market and demand. Obviously, we're all aware of Ciena's comments from roughly 90 days ago. It doesn't sound like you're seeing any weakness, or at least meaningful weakness, but any granularity you can provide would be appreciated.
I'm sorry, Paul. Hi, this is Giovanni here. You talk about any market in particular or in general?
Communication.
Well, I'm talking about the telecom piece of the market in general, given Ciena's comments. I'd ask you to address both telecom and datacom.
I think they are both pretty solid. I still think we have seen a nice comeback of a number of customers, which I think, very normally, were on the sideline during the transaction. Whenever there is an acquisition or merger of the size that we just went through, some customers were waiting to see the combination and so forth. Those customers are coming back to us. There is, for sure, a customer intimacy that we had with these customers helping a lot. I think the general cloud infrastructure upgrades as well as all of the telecom infrastructure upgrades to support 5G deployment, we are benefiting for both at the same time. I think it's a pretty healthy demand right now.
Okay. On the Compound Semi side, I think last quarter and preceding quarters, not surprisingly, you'd referenced relative weakness in the automotive market given what was going on relative to the pandemic. That market's obviously picking up. Are you starting to see that come back meaningfully?
Yeah, definitely.
What are you looking at over the next?
Yeah. I'm sorry, Paul. Sorry to interrupt. Yeah, absolutely, Paul. Absolutely, yes. In fact, I have to say that, I guess with no surprise, China is coming at us much faster than anybody else. The demand from China for our Compound Semiconductor products as well as our passive optics products is very strong. It's a very competitive environment. There's a price pressure, and as I mentioned in my prepared remarks, I think our investments, particularly on the 6-in gallium arsenide production line to basically accumulate a demand of semiconductor laser chips, which can go well beyond the internal demand of any fiber laser manufacturer that is vertically integrated. As that demand accumulates, I think we can be as competitive, if not actually more competitive, with the cost structure of the individual chips.
In other words, our customers that are not vertically integrated are benefiting from our cumulative demand. Therefore, they end up with a cost structure as if they are actually vertically integrated because we have such a large scale. Particularly on 6-inch, which as I mentioned earlier, we believe we are the only one in the world to have such a capability. Going back to the industrial market, I think is definitely much healthier than it was in the past few quarters.
Great. Thank you.
You're welcome.
Your next question comes from the line of Vivek Arya with Bank of America Securities.
Thank you for taking my question and congratulations on the strong results. First question, Mary Jane, for you. Good to see the OpEx discipline, OpEx around 20%, 21% of sales. I'm curious what drove this low OpEx? Can you maintain this kind of OpEx intensity, right? What are you thinking about OpEx in Q2 and just what would be the puts and takes as we try to model out expenses for the next several quarters?
First of all, I think, we have made the OpEx a very significant priority for the company, as evidenced in the fact that we delivered in the first-year acquisition synergies that were twice the first-year target. I do think that the correct way to look at OpEx is as a function of the sales level, because obviously there are some costs that are associated with growing those sales. Generally speaking, we would expect to be able to hold as we go forward, inclusive of investments that I think are important as we go forward between, say, 22%-25% of sales. Some examples of the investments that we have started this quarter and will continue are the investments for silicon carbide modules and devices. There are a few that we will add.
For example, the company is going to undertake, at least in the United States, and I imagine that might expand COVID testing in the company, to continue to ensure the health and safety of all of our staff.
Got it. One question for Giovanni or Chuck, which is as we are at the start of calendar 2021, I'm just curious to hear your thoughts on the one or two things you're most excited about, and also one or two things that perhaps concern you. Where I'm coming from is that was any part of the growth or the market trends you saw this year were just there because of COVID and do they perhaps decelerate next year? Were some of these changes more structural in nature and can actually continue into next year? Thank you.
Okay. Thank you for the question. I think in general, our investments in Compound Semiconductors platforms, whether gallium arsenide, indium phosphide, silicon carbide, I think, it's probably where most of the excitement is. Not only because obviously we are merchant suppliers of components that rely on those platform, but also we are the direct beneficiaries for our subsystems and modules, which are basically integrated around those technologies. We have a very fruitful discussion with our module and subsystem designs internally, as well as our customers that rely on those platforms to differentiate their products. I just want for them, maybe one detail about indium phosphide, as I mentioned in my prepared remarks.
We are very excited about it, because we are relying on 20+ years of investments made by Finisar on a platform which we believe is really world-class, and we'll continue to invest in it as we see an array of customers really interested in scaling up the capability to leverage the performance of the individual lasers and photodiodes that we make for the internal demand as well as the external demand. That's probably where we see the greatest upside because we're starting from zero. We started from zero when we closed, and so now that's growing rapidly, and we see that eventually to become a major portion of our market presence in the optoelectronics Compound Semiconductor technologies.
All right. Thank you.
You're welcome.
Your next question comes from the line of Mark Miller with The Benchmark Company.
Congratulations on your results. Just had a question. Did you say what the bookings were for the quarter?
We haven't reported bookings in the quarter for a while. The backlog, as I said, remains very, very strong at $899 million, and the rolling 12-month bookings is still over one.
Okay, one of your competitors indicated they were seeing some delays in 5G for certain type chips. Have you seen anything like that? This is in China.
Hey, Mark, this is Chuck. No, we have not.
Thank you.
Thank you.
Your next question comes from the line of Ananda Baruah with Loop Capital.
Hi, guys. Good morning. Thanks for taking the question. Congrats on the strong execution. I guess just two quick ones, if I could. Can you talk a little bit about what your expectations are for 3D sensing for the December quarter relative to the September quarter? Congrats on the strong performance there. I have a quick follow-up after that. Thanks.
Hi, Ananda. This is Giovanni. Thanks for your question. We expect our Q2 3D sensing revenue to be higher than Q1. I think we believe we'll continue to gain share in the market where l ike we've done for the past few quarters. I'm sorry, what was the second question?
Actually, I didn't ask it yet.
Oh.
I'll ask you in a moment, Giovanni, but I appreciate the context. Guys, this is not the second one, this is the follow-on to the first. Any chance you could give. Sounds like you're gaining momentum there. Would you expect with the staggered rollout of certain phones that you could be up potential for it to be up sequentially in March quarter as well?
We'll have to see. We have forecasts, but we don't have that visibility in terms of orders. I think we have to wait.
Got it. Mary Jane, my follow-up is on operating margin. How much of the expansion you saw this quarter was from the work that you've talked about with Finisar? Is a decent amount, meaningful amount from the 3D sensing ramp as well? If there's anything else besides Finisar, I would love to know about it.
We've talked in the past that anytime we launch a new product, that the single biggest driver of change in operating margins is anything that has newly begun ramping. Sure, the fact that we are seeing 3D sensing ramping is really very, very good. A lot of excellent work has been going on at Sherman since the March quarter. The truth is, across all of our operations, not the least of which, as Giovanni talked earlier about the automotive and industrial markets coming back, that also leads to greater fab utilization, for example, in the Zurich fab. All of that is I think really a function of what drove it. 3D sensing probably was the kind of last one out there to start to move, and it did in the March quarter, and that's been very, very good.
I would take nothing away from the OpEx intensity that has been going on in the company since the acquisition closed.
That's really helpful. Thank you, guys. Really appreciate it.
Sure. Thank you, Ananda.
Your next question comes from the line of Jim Ricchiuti with Needham & Company.
Hi, thank you. Good morning. I was wondering if you could go back to an earlier comment that you made about, hopefully I heard this correctly, that you were unable to ship roughly about $40 million of finished goods. Can you elaborate on that? What areas and where are you in terms of some of those supply chain challenges?
Okay. Hey, good morning, Jim. This is Chuck.
Hey, Chuck.
Hey, good morning, Jim. The bulk of it is in the Photonics Solutions business, and that's the first part of your question. What's the second part of your question?
Well, just in terms of where are you in terms of those supply chain challenges. Is this something that you expect is going to persist?
I would say that it came up. I think we did one heck of a job, first of all, even in this quarter. Our supply chain team, global supply chain team is just fantastic. I think what began to happen is that as the industrial markets, automotive markets, and the markets in China began to heat up and became kind of back onto the track they were on, I think that the supply chains were generally under pressure. We were able to mitigate everything that we needed to be able to deliver strongly on this quarter. As you could tell from our guidance, we thought there was a possibility that we could hit $750 million. What our supply chain people have been able to do is not only mitigate the impact in this quarter, but also I'm expecting the impact to Q2 to be immaterial.
That's helpful. Chuck, the follow-up question is just with respect to the announcement on the 6-in fab for the laser diodes for industrial applications. I'm wondering, what does this do for the customers that you deal with in China on the fiber laser side in terms of their ability to perhaps move up market to higher kilowatt class fiber lasers?
That's pretty simple. It enables it.
Yeah. Okay. Thank you.
Okay, thank you.
Your next question comes from the line of Sidney Ho with Deutsche Bank.
Thanks for taking my question. A couple of them. First question is regarding the inventory and your customers on the supply chain. What is your updated view on that in terms of just the supply chain inventory or any pre-purchases that is happening, especially given the strains that you are seeing in China?
Sidney, is your question, can we comment on whether the shipments we've made are going into inventory and what the customer's level of inventory is? Is that it?
Yes. Customer level of inventory on the supply chain.
Sidney, we're not going to be able to give you an atomically precise answer. Let me just comment about inventory in general. We are focused on our operating performance at every level and in every column, on our cost, on our working capital, on our inventory management. The world has just gone through a number of climate-based challenges, the virus itself, and our customers and our suppliers are shifting, I think, conversations a little more from just in time to just in case.
We need to stay focused on that because we're expecting to grow. We have to be really smart about it, and we're engaged with customers where we're trying to win share, serve their unforecasted needs. Inventory is a part of the conversation, meaning our ability to produce it, our ability to procure it. It's a balancing act, and we're not going to get carried away, but by all means, we intend to continue to grow, and inventory is a strategic part of that equation. Okay?
Okay. That's helpful. My follow-up question is, can you talk about what portion of your revenue is coming from 3D sensing and from silicon carbide today or last quarter?
Yeah. The consumer part of the company was about 7%, I think it was about 7% of the total. Then the portion that is silicon carbide proper, is probably in the neighborhood of 4% or 5% .
Okay. Thanks. Maybe one last question for me. Thank you for the gross margin guidance for the year in the slide deck. I think you guys are expecting 38%-42% for the fiscal year. What are the major factors you see driving margins towards the high end versus low end, recognizing you're already at kind of like the midpoint of that range right now? Thanks.
Right. Well, obviously, as Chuck and Giovanni both commented on, in an engineered materials company, volume is pretty critical. The margins are very affected by the extent to which the grown materials are in demand and sold. That is going very nicely right now, as Giovanni commented on the variances across the board, whether that be EUV, industrial, 3D sensing, et cetera. That's the first one. The second one is, from an operating efficiency point of view on the ground, we have worked very hard in II-VI to put capacity in when we need it and to add capacity by breaking line bottlenecks. When we need a new line, the first thing we do is figure out whether we can make a new line out of an old line by breaking bottlenecks and putting in, say, different metrology equipment.
We will continue to do that, and as that is further deployed in the combined company, that also has significant benefits as well. Chuck is correct that the supply chain teams continue to be relentless on the goals that they have taken on for themselves. Then I think really finally, the last one is being sure that we're really in lockstep with the customer on their timing, what they're taking when, what they really need, and that we're really right there with them on their forward-looking strategic goals so that the portions of the engineering guys that might come off the line to do the design for manufacturability is also used to the most efficient extent. Those are the main things that tend to drive the gross margin. At the end of the day, volume is very important.
Great. Thank you.
Sure.
Your next question comes from the line of Richard Shannon with Craig-Hallum.
Well, good morning, Chuck and Mary Jane. Thanks for taking my questions. I think my first one is on the Compound Semi segment for Mary Jane here. Your operating margins are up very nicely in the September quarter versus June. I wonder if you could describe qualitatively how much of that is due to gross margins versus OpEx efficiencies. Kind of simultaneously here, well, you've never given us a gross margin level there. What kind of opportunity do you see for growth in Compound Semi gross margins over the next few quarters or couple of years or whatever timeframe you choose is what?
Right. A couple things. One, the operating margins in the segment tend to be, for Compound Semi, I'd say as we've said before, their gross margin tends to be above the corporate average, and then Photonics, it tends to be slightly below. Comp Semi's game really is almost won or lost on the gross margin because we make every grown material except one in that segment. All the laser diodes are made in that segment. It is the classic situation where the volume and the efficiency of the growth process is really important. Having said that, Giovanni has been very diligent in the OpEx, as we look at, for example, where do we make things? Our company has never had a situation where we make the same thing in a lot of places.
He does continue to work very hard on really what is the footprint we have, and then that also affects his OpEx footprint. In Photonics, it tends to have quite a bit more people in it, right? A little bit more assembly. The supply chain has a huge effect there. As Chuck's already said, they're already doing a wonderful job. In their case, just efficiency of line flow tends to have the biggest effect. Any way you cut it inside the segment, the gross margin is a big deal. The second part of your question was, do I think Compound Semi could go up? If you all would have asked me before what I thought the resting margin for Comp Semi was, I probably would have said between 18% and 21%. As usual, Giovanni just blows that out of the water.
I do think that they are at a pretty nice level at this point, but at the end of the day, they do have the highest margin products in the company, and I think we really need to see how the demand develops over time, how we see various design shifts going. I'm sure that Giovanni's own segment has not given up on whatever progress they can make in the segment. Generally, I'd say that I'm very proud of them for what they achieved in this quarter, and that was not easy.
Great, Mary Jane, for the detail there. My second question is on Datacom here. I wonder if you could give us a sense of how long your visibility within cloud looks like relative to normal or whatever normal is. Also, have you seen any potential share gains at the 100G speed, and what's your position in 400G so far?
This is Giovanni here. As I said earlier, we've seen a nice pickup on those sales. I think it's a combination, as I said earlier, between customers reengaging the combined team, which probably took a pause of 12, 18 months, not only because we're going through the deal, but also because probably some deployments were kind of slowed down. I think they're both coming back, the demand just from the market as well as the customers reengaging us. I think we're pretty positive about the near outlook to continue that trend. I'm sorry, what was the second part?
If you've seen the potential share gains in 100G, and where do you sit in terms of design win share in 400G?
Yeah. 400G, we are shipping in volume, as I said in my prepared remarks today. We are really shipping in volume. We believe that with quite a cycle around 400G. We think that, for example, until 2025, less than 50% of the market will be at 400G. I mean, at 400G. We have plenty of time to grow and gain share while we continue to be a leader, we think, at 200G. Of course, 100G is still going to be more than 40% of the total addressable demand until 2024. We had to have multiple platforms ready and competitive, and I think over time, eventually 400G will become the largest, the dominant segment of the market. Even in 2025, we'll still be maybe 45% of the total, still less than 50%.
It's important that we serve all of them, and while we lead on 200G, we'll grow the 400G in parallel.
Okay, great. Thanks for the detail, Giovanni.
Thank you. You're welcome.
Your next question comes from the line of Tom Diffely with DA Davidson.
Yes, good morning. Question on the indium phosphide opportunity. What is the length of the design cycle or the sales cycle for the components or subsystems in that space?
Thanks for the question, Tom. This is Giovanni . It's really dependent on the customer needs. We have shipped products which wasn't even qualified, so much was the demand for our lasers, which is really, at least for me, it's always a first time in your life. I just couldn't believe the laser was really so performant that we got POs and we shipped even before the qualification cycle was completed. I think that the whole design cycle for some of these devices can be as short as six months, and as long as maybe 18. It really depends on the application. There is no doubt that the fact that we made available to a number of customers a platform in which, as I said earlier, Finisar invested for a very long time, I think was really, really attractive to several of them.
Not only in terms of performance, but as I said earlier, also in terms of scale, right? We have a cost structure with a very well-utilized fabs between Fremont, California, Järfälla, Sweden, and we think those fabs are doing extremely well. The internal volume helps utilizing those fabs and therefore providing a very competitive platform to our external customers, too.
Great. Thanks for the color. As a follow-up, what are you seeing in the EUV market? Have you seen a near-term pause, and has your long-term outlook changed?
Not really. No, I think we are proceeding as planned. As more and more systems are deployed and operational, obviously the percentage of spare replacements as a total of the EUV business for us increases, right? That is a nice and steady, eventually over time growing demand for components. Short term, no, I don't think we have seen any change in the deployment. I think we are benefiting from the incredible need for these tools that, as you know, they are seven years behind in terms of the promised deployment. Everybody's really looking forward to deploying more and more tools in the field. We are sole sourced on over 100 piece parts, unique parts that go into the system. I think we are well positioned to take advantage of those deployments over time.
Great. Thank you.
You're welcome.
This concludes the Q&A portion of today's call. I'll now hand it back over to Ms. Mary Jane Raymond for closing remarks.
Thank you, Marsha. Thank you all for joining us today. Once again, thank you to all the veterans that we are talking to. We thank you for your service, and we will talk to you again in one quarter, if not before. Thanks again.
Ladies and gentlemen, this concludes today's conference call. Thank you for participating. You may now disconnect.