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Imec Extends Silicon Photonics Portfolio Targeting Next-generation Data Center Interconnects - With 12 presentations at ECOC, imec and its research labs at the Ghent University are at the forefront of Europe’s silicon photonics technology development - ECOC2019.org / imec-int.com
Imec Extends Silicon Photonics Portfolio Targeting Next-generation Data Center Interconnects

 

NewswireToday - /newswire/ - Leuven, Belgium, 2019/09/23 - With 12 presentations at ECOC, imec and its research labs at the Ghent University are at the forefront of Europe’s silicon photonics technology development - ECOC2019.org / imec-int.com.

   
 
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This week, at the 45th European Conference on Optical Communication (ECOC) (ecoc2019.org), imec, a world-leading research and innovation hub in nanoelectronics and digital technologies, together with IDLab and the Photonics Research Group, both imec research labs at Ghent University, are presenting key milestone results in silicon photonics (SiPho) technology development. The demonstrated building blocks help pave the way for 400Gb/s and beyond optical links as well as for co-packaged optics in next-generation datacenter switches key enablers for data transmission in future data centers. Highlights include a TSV-assisted, high-density (Tbps/mm2) CMOS-SiPho transceiver prototype, a low-power 106Gb/s PAM-4 SiPho transmitter, a high-speed Ge/Si avalanche photodetector, and ultra-broadband low-loss single-mode fiber couplers.

The exponential growth of the Internet and its associated applications has pushed datacenters to deploy optical interconnects with continuously increasing performance, and ever smaller power consumption and footprint. In the next few years, data center optical links will be upgraded to 400Gb/s capacity, by aggregating four 100Gb/s PAM-4 lanes per link. As a consequence, the aggregate bandwidth to be handled by a single datacenter switch will increase to 51.2Tb/s, requiring ultra-high-density SiPho transceiver technology, tightly integrated and co-packaged with the switch CMOS chip.

To help industry meeting these challenging scaling requirements, imec and its research labs at Ghent University are developing the key technology building blocks, by leveraging imec’s Si Photonics Platforms on 200mm and 300mm wafers, in combination with high-speed electronics.

Joris Van Campenhout, Program Director Optical I/O at imec commented: “Our R&D programs have delivered substantial improvements at various levels of Si Photonics technology, both at the level of process integration, individual component development as well as at the sub-assembly level. We are thrilled to share our progress with industry and academia at the ECOC conference. We look forward to continue helping the communications industry in Europe and beyond to address the key challenges in developing next-generation optical interconnect technology.”

One of the highlights that imec presents at ECOC is the first through-silicon-via (TSV) assisted hybrid FinFET CMOS/Si-photonics transceiver technology. Operating at a data rate of 40Gb/s non-return-to-zero (NRZ, single lane), this prototype combines ultra-low power consumption with impressive (1Tbps/mm2) bandwidth density, paving the way to ultra-dense co-packaged optics in future datacenter switches.

Imec and Ghent University are also presenting a 106Gb/s transmitter that uses PAM-4 as a modulation format. This 4-level modulation format has recently been adopted by industry as the modulation format of choice for 53GBd single-lane transmission over 500m. Compared to other PAM-4 transmitters, imec’s solution does not use any equalization or digital signal processing and integrates two parallel GeSi electro-absorption modulators. This results in an extremely compact and low-power (1.5pJ/b) transmitter able to transmit data over 1km single-mode fiber at 106Gb/s.

Also, imec demonstrates improved edge coupler designs, based on a hybrid Si/SiN photonic platform. Innovations to the layer stack resulted in better than -1.5dB/fiber coupling efficiency to industry-standard single mode fibers for operation in the O- and C-band. On the receive side, a high-speed Ge/Si avalanche photodetector is presented with a multiplication gain of 8 and 32GHz bandwidth. These avalanche photodetectors show great potential for improving receiver sensitivities and optical link margins at data rates of 40Gb/s and beyond.

About imec

Imec (imec-int.com) is a world-leading research and innovation hub in nanoelectronics and digital technologies. The combination of our widely acclaimed leadership in microchip technology and profound software and ICT expertise is what makes us unique. By leveraging our world-class infrastructure and local and global ecosystem of partners across a multitude of industries, we create groundbreaking innovation in application domains such as healthcare, smart cities and mobility, logistics and manufacturing, energy and education.

As a trusted partner for companies, start-ups and universities we bring together more than 4,000 brilliant minds from over 97 nationalities. Imec is headquartered in Leuven, Belgium and has distributed R&D groups at a number of Flemish universities, in the Netherlands, Taiwan, USA, and offices in China, India and Japan. In 2018, imec's revenue (P&L) totaled 583 million euro.

Imec is a registered trademark for the activities of IMEC International (a legal entity set up under Belgian law as a "stichting van openbaar nut”), imec Belgium (IMEC vzw supported by the Government of Flanders), imec the Netherlands (Stichting IMEC Nederland, part of Holst Centre which is supported by the Dutch Government), imec Taiwan (IMEC Taiwan Co.), imec China (IMEC Microelectronics (Shanghai) Co. Ltd.), imec India (Imec India Private Limited) and imec Florida (IMEC USA nanoelectronics design center).

About IDLab and the Photonics Research Group

IDLab (internet technologies and data science) and the Photonics Research Group are both imec research groups at Ghent University. Inside IDLab (about 350 people), the Design team (20 people) (idlab.technology) is currently one of the leading groups in the research and development of high-speed, low-power transmitter and receiver integrated circuits for next generation transport, metro, access, datacenter and radio-over-fiber networks with extensive experience on high-speed design in CMOS and SiGe BiCMOS for different optical devices. The Photonics Research Group is specialized in photonic integration and more specifically in silicon photonics. With 9 professors (of which 6 current or former ERC grantees) and about 90 researchers the group works on new device concepts and technologies, new system architectures and design methodologies, new application domains and proof-of-concept demonstrations, all building on the capabilities of silicon photonics.

 
 
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Imec Extends Silicon Photonics Portfolio Targeting Next-generation Data Center Interconnects

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