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Re: Dr MoTalking with Dr. Mo Jinyu about POET and its optical integration technology
Fiber Optic Online Editorial Department 2022-04-02 17:01:16 Article source: All
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Introduction: POET is a designer and developer of optical engines based on innovative optical Interposer technology. Their Optical Interposer is a flexible, proven, low-cost, unparalleled flexibility for a wide variety of applications ranging from pluggable optical modules to on-chip photonic integration, artificial intelligence, smart wearables, consumer electronics and more Yes, wafer-level optoelectronic integrated products. This technology will help POET become the world leader in chip-scale photonic devices.
4/02/2022,
Optical Fiber Online News, "What we do is actually an optoelectronic
carrier that can be flip-chip mounted." As soon as they met, Dr. Mo
Jinyu broke the editor's mind about their "Interposer" technology and
Product "fear" psychology. From
Bookham to Oclaro, from Macom to joining POET more than a year ago, Dr.
Mok has been well-known inside and outside the industry as a technical
expert. After so many
companies doing optical integration, why did she leave a big company to
join a small company that is not well-known, and few people can even
explain what they are doing? What about this little company with a poetic name and their "interposer" technology? On
the morning of April 1, in the Tims Cafe in Shenzhen Science and
Technology Park, Dr. Mo revealed to the editor the mystery of this small
Canadian multinational company.
Dr. Mo (left) was interviewed by the editor . What kind of company is POET? POET is a designer and developer of optical engines based on innovative Optical Interposer technology. Their Optical Interposer is a flexible, proven, low-cost, unparalleled flexibility for a wide variety of applications ranging from pluggable optical modules to on-chip photonic integration, artificial intelligence, smart wearables, consumer electronics and more Yes, wafer-level optoelectronic integrated products. This technology will help POET become the world leader in chip-scale photonic devices. Headquartered in Toronto, Canada, POET has branches in Toronto, Canada, Allentown, Binzhou, USA, Singapore, and China. POET is listed in Toronto and Nasdaq, and the stock code (TSX-V:PTK NASDAQ:POET) above is based on the official introduction of the company's website. It is particularly pointed out that on March 14 this year, POET was transferred from the NASDAQ OTC market to the official market. POET President Vivek Rajgarhia The GoPhotonics website has an interview with POET President Vivek Rajgarhia in August 2021 [1]. A 30-year veteran of the optical communications industry, Vivek's last job was general manager of the lightwave business at MACOM. In this interview, Vivek mentioned that today's POET will start in 2015, when former GlobalFoundries CTO Dr. Suresh Venkatesan joined as CEO. At the time he was invited to validate GaAs VCSEL technology from the UConn lab, a project that was abandoned in 2017 with the advent of the Optical Interposer. The name POET appeared in 2013. The company was originally established by a Canadian mining company through a reverse takeover and was registered as OPEL International in 2006. According to Dr. Mo, POET's staff in Canada today are mainly financial staff. What kind of technology is Light Interposer? Optical Interposer technology is the core technology of POET. But just explaining the technology is not easy. The editor tried to understand Interposer from the English etymology and found a suitable Chinese translation for it, but found it difficult to understand the poser (Webster dictionary poser). Dr Mo said the term Interposer was actually quite common in the electronics industry. Edited to find the definition of Interposer from ScienceDirect: "An electrical connection usually formed by a photolithographic process of metallized flexible polyimide tape" [2]. Dr. Mo said that Interposer in the electronics industry plays the role of interconnecting electrical chips. Through TSV (Through Silivon Vias) forms a bridge for chip interconnection on silicon wafers, which is a typical 2.5D semiconductor packaging technology. An article on 2.5D semiconductor packaging pointed out [3][4], 2.5D refers to the fact that the chips are not packaged first, but are arranged in parallel on the same substrate, and then wire-bonded or flip-chip or silicon. The process of through-hole is connected to the interposer (Inter-poser), and the manufacturing process of connecting multiple functional chips in the vertical direction. Therefore, POET is to expand the Interposer technology to the optical domain based on the electrical domain. The optical Interposer of POET covers both optical and electrical parts. Perhaps the above statement of the intermediary layer is at least a reasonable Chinese translation. So what are the similarities and differences between the optical interposer of POET and the traditional electrical interposer? According to Dr. Mo, the optical interposer of POET is actually a silicon optical waveguide grown on a silicon substrate, on which various optical passive devices can be fabricated. At the same time, it can cooperate with flip chip technology to realize integrated packaging with active devices of various other materials. The devices of these other materials can be semiconductor lasers, receivers, silicon light modulators, or fashionable Lithium niobate thin film modulator (POET and Jiangsu Liobate announced their cooperation in February this year). It is the combination of these two technologies that gives POET the confidence to become a leader in optical integrated devices. First, their silicon nitride waveguide technology is unique, says Dr. Mo. Not only is it fully compatible with the existing CMOS process, it does not require equipment adjustment like many silicon photonic processes, but also has better performance indicators, such as easy to achieve athermal design, more support for polarization-maintaining design, etc. POET also creatively introduced flip-chip technology into optical device packaging. Through their design of alignment marks on silicon waveguides, mode spot matching and other designs, SMD devices are supported to achieve high-precision passive alignment. Dr. Mo said that some of the current mainstream high-precision placement equipment can support their process. As a representative of the combination of these two technologies, the laser coupling efficiency of POET can reach 90% and above. Such high coupling efficiency solves the pain points of difficult supply and high power consumption of ultra-high-power lasers in external light sources for CPO applications [5][6]. What are the advantages of using an optical interposer? In an interview with GoPhotonics, Vivek pointed out that through advanced wafer-level semiconductor manufacturing technology and novel packaging methods, POET's optical interposer can help reduce the cost of traditional optical device packaging, alignment, and testing. Dr. Mo explained this more clearly. She told the editor that the RF circuit and optical circuit design of the current high-speed optical module is actually very complex, which has exceeded the capabilities of many small optical module companies. The POET optical engine products based on the optical interposer have packaged the high-speed circuit and optical circuit design together, which greatly reduces the threshold for customers to develop high-end optical modules. What's more, Dr. Mo revealed that their products also make customer modules more cost-effective. At present, some customers have begun to experiment with their 100G, 200G and 400G optical engines for development and production. POET's optical engine based on optical interposer and its application Dr. Mo said that compared with many current silicon photonics solutions, POET's optical interposer technology is also based on silicon photonics integration. Different from the deep etch coupling scheme of traditional silicon photonics chips, they realize coupling on the surface, which is easier and more efficient. Why trust POET? Dr. Mo said that her choice to go to POET inspired many friends. She said that she usually likes to study technology and ponder technology, and has been doing photonic integration for so many years. She believes in POET's technical route. She asked the editor, "Which company have you seen like POET spending five or six years on research and development, and pondering every detail until it's done?" In order to solve the difficulty of cooperating with lasers, POET acquired it in 2016. Denselight Singapore. The fusion and collision of the two companies subsequently resolved the cooperation of POET's optical interposer to the laser. POET has kept a low profile over the years, and now their product is ready and ready to start shipping in bulk. Marked by the official listing on Nasdaq, POET will go out of the mode of only burning money without output. For small and medium module manufacturers, they provide a variety of ready-made optical engine products, allowing more optical module manufacturers to enter the high-end module business. For large module manufacturers, they provide more mature silicon photonics solutions, CPO solutions. OIF's Near Optics Package (NPO) interoperability demonstration at OFC this year is a good demonstration of their optical interposer technology. POET's Optical Interposer is used for CPO indication In June last year, POET and Xiamen Sanan Optoelectronics established a joint venture. In the future, their optical engines based on optical interposer technology will be assembled and produced in Xiamen. "Hopefully soon, you will see POET products and technologies everywhere," said Dr. Mo. References 1 https://www.gophotonics.com/interviews/details/interview-with-vivek-rajgarhia-from-poet-technologies 2 https://www.sciencedirect.com/topics/engineering/interposer 3 Optical Interconnects for Data Centers Woodhead Publishing Series in Electronic and Optical Materials 2017, Pages 265-286 4 https://blog.csdn.net/qq_39021670/article/details/108940547 5 https://cloud.tencent.com/developer/article/1887589 6 https://poet-technologies.com/poet-platform.html |
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