POET Technologies’ 400G FR4 Receive Optical Engine is among its products built on the company’s optical interposer platform that have attracted industry attention.

At POET Technologies, we have been a company of “-ization”. We had a goal for the “legitimization” of photonics in the semiconductor industry and built a hybrid-integration solution to deliver on the “optimization” of products built with the proprietary POET Optical Interposer. We have touted “miniaturization” of photonic solutions using chip-scale, wafer-level assembly as critical to gaining industry attention and the “semiconductorization” of photonics as a description of what our seamless integration of photonics and electronics achieves.

Now, we bring the most exciting suffix of all to the top line of our story: commercialization.

Momentum has steadily grown for our products, which are currently being sampled by customers in data centers, telecommunications, and AI. They’re attracted to the POET Optical Interposer-based solutions that eliminate costly use of discrete components and labor-intensive assembly, alignment, and testing methods. Those earliest adopters of the technology include:

The O-Band LightBar™ by POET Technologies features high-power CW lasers for co-packaged optics and AI-ML GPUs. Celestial AI is POET’s lead customer for AI products.
  • ADVA: The European network equipment provider (recently merged with AdTran, Inc.) has collaborated with POET on an innovative set of optical engines to extend the life of legacy data center infrastructure while enabling simple seamless migration to next generation speeds.
  • LuxshareTech: POET’s 400G and 800G optical engines will help this global datacom company offer its end customers high-speed transceiver modules.
  • Celestial AI: The high-powered, well-funded Silicon Valley startup has received alpha samples of POET’s C-band Light Engines for high-speed chip-to-chip communications in the first quarter of 2023. Purchase orders are expected later in the year.
  • FiberTop Technology: The transceiver company plans to leap over its competition with the help of POET’s 100G and 200G optical engines in its pluggable transceivers.
  • What these companies — and others whose names remain shrouded by confidentiality agreements — have realized is that the POET Optical Interposer provides market differentiation in four key areas and that gives its suite of products advantages over alternative technologies.

1. Ease of Integration

The capital costs of replacing old equipment to accommodate new technology is always a challenge for companies. Whenever a solution emerges that can extend the life of existing infrastructure, executives are sure to consider the opportunity. That’s what happened more than two years ago when POET and ADVA began discussing how to get the most out of 100G ports (which are currently prolific in data centers) and how best to transition the industry to 400G. On January 18 this year, POET and ADVA announced a strategic collaboration for optical engines that represent a life extension for a significant number of legacy 100G ports. POET has developed a multi-engine 100G CWDM4 and 100G LR4 optical engine that ADVA will use in its pluggable transceiver solution that packs the functionality of four independent 100Gbit/s interfaces into a single 400G transceiver in a QSFP-DD housing.

The POET Optical Interposer is designed to be a platform technology that seamlessly integrates with legacy solutions to extend the life of pluggables and support the development of next-generation photonics products.

ADVA’s MicroMuxTM Quattro has individual 100G ports in a QSFP-DD package that plugs into a 400G port. Along with fitting into standard sockets, it fans out 4x100GbE, maximizing the use of existing hardware in data centers. The solution creates compatibility to the legacy 100G links without the need for retrofits in network design or the use of additional hardware.

POET Technologies has shipped samples of its 1.6Tbps receive optical engine.

“ADVA’s MicroMux™ Quattro brings the industry’s smallest aggregation technology all the way to the network core. Engineered as a standard-compliant plug in a QSFP-DD form factor, it fits into a 400Gbit/s socket, enabling it to meet legacy needs. This innovative pluggable solution packs the functionality of four independent 100Gbit/s interfaces or two independent 200Gbit/s interfaces into a single QSFP-DD housing,” said Ross Saunders, GM of Optical Engines, ADVA, in a press release. “POET’s unique design of its optical engines with hybrid integration of optical chips and monolithically integrated MUX and DMUX enables us to deliver industry-leading products in a small form factor that is scalable to high volume production as well as to higher data rates, such as 1.6Tbit/s and 3.2Tbit/s, thereby enabling much higher bandwidth in a pluggable form factor.”  

It’s the most public example of the ease with which POET’s products integrate with current systems and equipment, though much of the excitement building for interposer-based optical engines has to do with inherently lower capital and assembly costs — especially at a time when many companies are coming off of a difficult two years.

2. Scalability

Among POET’s hallmarks is the ability to scale to high volume while avoiding high capital and operating expenses associated with conventional assembly of transceiver modules. By procuring optical engines from POET, our customers benefit from a steep reduction in the bill of materials, which results in a dramatic drop in module assembly costs. The company estimates its technology lowers industry assembly costs by as much as 70 per cent from current solutions, by reducing the number of components and eliminating active alignments.

The smaller form factor (6mm x 9mm for an optical engine) and wafer-level manufacturing is critical to its scalability – increasing volume while driving down size, cost, and energy consumption. Even more importantly, chip-scale wafer-level packaging is considered the only means available to meet the scalability demands of the future.

3. Versatility

The POET Optical Interposer design allows engineers to layer components on top of each other and to achieve unique architecture to solve problems at chip level. For example, ADVA asked POET’s team to tweak the design of the engines in order to maximize the routing within the module.

POET Technologies is scheduled to unveil an 800G transceiver solution in the first half of 2023. In the meantime, it has completed its 800G 2xFR4 Receive Optical Engine with integrated trans-impedance amplifier (TIA) and photodiodes.

POET pulled wire bonds (which are on the side of an engine) to the front to accommodate other components in the tight space. Such clever adjustments were done to deliver a customized solution.

On top of that, POET uses known-good components that have been selected for their appropriateness to specific applications. Last year, the company announced the addition to its product designs of high-speed directly modulated lasers (DMLs) from Lumentum. It also uses continuous-wave (CW) lasers from Broadcom, adding to the best-of-breed components in its designs.

Produced solely with CMOS-compatible wafer fabrication methods, the POET Optical Interposer uses a standard high-resistivity silicon substrate to enable high-speed communications among all the components on a single chip. A wide variety of components (e.g., lasers, detectors, modulators, photodiodes, drivers, etc.) are flip-chipped and bonded onto the optical interposer, creating an “optical engine” on a single chip. That simplicity allows engineers to imagine how to develop more innovations and to do it with a platform technology created to be used with diverse material systems and for generations of products to come.

4. Future Deployments

Speaking of the future, POET is already building toward it with partners and customers.

An industry that has struggled to find a reliable and cost-efficient solution to achieving higher speeds of data transfer can soon adopt POET’s technology to architect 400G, 800G, 1.6Tbps and 3.2Tbps pluggable transceivers. By using POET’s optical engine “chiplets”, module designers can easily scale simply by multiplying the number of them in a single package. A 400G chiplet, when multiplied by two, becomes an 800G solution, all within the same housing and without taking up any more space in a module.

The flexibility of the POET Optical Interposer extends to the materials it can use. POET is working with Liobate Technologies, an inventive company that specializes in Thin Film Lithium Niobate (TFLN), known as a stable and reliable material with promise of delivering higher speeds and reducing insertion loss. POET is using TFLN initially as a modulator solution for the commercialization of its 400G and 800G transmit and receive optical engines. It is on track to have a 400G transmit solution — which can easily scale to 800G and 1.6Tbps — ready for sampling in the first half of this year. Called POET Infinity, the powerful chiplet earned praise when it was demonstrated at the OFC industry event in March.

It’s these building-block advancements that are proving that POET’s goal for commercialization in a market of need is taking shape. While it’s novel now, the use of the POET Optical Interposer appears to be lining up for wide-scale utilization and, perhaps eventually, normalization as the go-to technology for wafer-level, chip-scale engineering.


The Information contained here is a paid advertisement and is for information purposes only and is not to be construed as an offer or solicitation for the sale or purchase of securities. Prior to making any investment decision, it is recommended that readers consult directly with the public company and seek advice from a qualified investment advisor. The corporate information included in this was provided by POET Technologies in order to help investors learn more about their company. The information provided is purely and solely the responsibility of POET Technologies who has reviewed and approved all material for accuracy. Stockhouse does not provide investment advice and the information on this profile should not be considered a recommendation to buy or sell any security. Investing in securities is speculative and carries risk. Persons who wish to buy or sell securities should only do so at their own risk and in consultation with their registered securities advisers. Stockhouse does not own stock in POET Technologies.

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