Hengtong Optic-Electric releases 400G silicon photonic transceivers

Created April 7, 2021
Technologies and Products

Hengtong Optic-Electric subsidiary company Hengtong Rockley Technology has launched a 400G QSFP-DD DR4 transceiver based on silicon photonic circuits and a 400G QSFP-DD FR4 transceiver based on the traditional free space solution. Hengtong says it is now capable of providing customers with 400G single mode optical transceiver modules for different transmission distances.

The mass production version of 400G QSFP-DD DR4 silicon photonic transceiver is based on the miniaturized silicon photonic integrated chips and electronic integrated chips made by UK-based Rockley Photonics Limited, which also utilises the most advanced 7nm DSP chip, with a power consumption less than 9W.

The company says the module’s manufacturing cost is 10-30% less than traditional 400G transceivers based on free space optics, satisfying the demand of low power consumption and environment-friendly requirement of data centre applications. Hengtong’s 400G transceivers utilise chip-on-board (COB) assembly solution, and passive alignment for optical coupling between fibre and silicon photonic chips due to a unique fabrication process, which is beneficial to mass production and cost reduction. Hengtong Rockley says it will accelerate mass production on 400G QSFP-DD DR4 silicon photonic transceivers.

Hengtong Rockley’s 400G QSFP-DD FR4 transceiver also utilizes 7nm DSP chip, EML is used on transmitter side, and InP detector is used on receiver side, with the help of low-cost and mature WDM photonic device, making the entire module design and layout very compact. The power consumption is less than 9W.

Hengtong has also released the first prototype of 3.2T CPO switch based on silicon photonic technology in China, which it claims is an important milestone in silicon photonic industry.

For more information, visit www.hengtonggroup.com


This article was written
by Peter Dykes

Peter Dykes is a independent telecoms and technology journalist who has over that last 30 years written for a wide range of B2B publications and companies. A former BT engineer, he specialises in networks and associated support systems. He is currently Editor of Optical Connections.