12 March 2018
NeoPhotonics to demo 64Gbaud coherent optical sub-assembly for coherent 400G-1.2T applications
© Semiconductor Today Magazine / Juno PublishiPicture: Disco’s DAL7440 KABRA laser saw.
In booth 3322 at the Optical Networking and Communication Conference & Exhibition (OFC 2018) in San Diego (13-15 March), NeoPhotonics Corp of San Jose, CA, USA (a vertically integrated designer and manufacturer of hybrid photonic integrated optoelectronic modules and subsystems for high-speed communications networks) is demonstrating its 64Gbaud coherent optical sub-assembly (COSA). The 64Gbaud COSA is based on the same technology as the firm’s coherent intradyne receiver (ICR) product line and its recently introduced coherent driver modulator (CDM), and integrates these two functions into a single compact package.
The 64Gbaud COSA is designed to work with NeoPhotonics’ ultranarrow-linewidth external-cavity Nano-ITLA (integrated tunable laser assembly) to achieve high optical performance in a form factor compatible with coherent pluggable OSFP modules. A 400ZR OSFP module with the COSA and Nano-ITLA operating at 64Gbaud and 16 QAM are also being demonstrated using off-module processing. The COSA and Nano-ITLA can also be used for single-lambda 600G and two-lambda 1.2T using 64Gbaud and 64QAM.
The 64Gbaud COSA contains a coherent I/Q modulator co-packaged with drivers, as well as a coherent receiver co-packaged with trans-impedance amplifiers (TIAs). The COSA is based on NeoPhotonics’ photonic integration technology and uses design elements that have been proven in production. It is about the same size as either the discrete CDM or the discrete Micro-ICR, so cuts the component footprint in half while simplifying fiber management and board layout. When the COSA is combined with NeoPhotonics’ external-cavity Nano-ITLA (which is also half the size of its Micro-ITLA predecessor), the size of the optics for next-generation modules is cut in half without impacting performance, meeting the requirements for OSFP pluggable modules and compact daughter cards.
The demonstration shows that “we have maintained all of the performance of the discrete components, but at half the size,” says chairman & CEO Tim Jenks. “These compact and highly integrated components are well suited for 400G and 600G per lambda applications that require very compact optical components,” he adds.
At OFC, NeoPhotonics is exhibiting its 64Gbaud COSA along with its suite of coherent components for 600G and 1.2T, along with its broad family of products for high-speed applications.
In addition, it is participating in a panel discussion and co-authoring two papers as part of the OFC technical conference:
- 12 March (11:15) - Paper M2C.3: ‘8×506-Gb/s 16QAM WDM Signal Coherent Transmission over 6000- km Enabled by PS and HB-cDM’, by Jianjun Yu (ZTE) et al, with co-author Steve Dzioba of NeoPhotonics.
- 15 March (10:15-11:15) - Winston Way, NeoPhotonics’ chief technology officer, Systems, is participating in a panel discussion ‘400G Coherent: What Does it Mean to You?’ as part of the ‘Intra and Inter Data Center Connectivity’ program in Theater II, Hall E.
- 15 March (10:30) - Paper Th2A.21a: ‘Block-wise Time Domain Large Signal Model of Carrier-depletion Mach-Zehnder Silicon Photonic Modulators’, Qun Zhang (Minnesota State University) et al, with co-authors Jianying Zhou and Jin Hong of NeoPhotonics.