Coherent’s 140 GBaud subassembly targets emerging 800G opportunities

Oct. 3, 2023
The new platform enables ultracompact pluggable form factors for optical communications networks.
GLASGOW, SCOTLAND--Coherent has introduced its 140 GBaud integrated coherent transmitter-receiver optical subassembly (IC-TROSA), a platform focused on enabling 800G QSFP-DD and OSFP digital coherent optics (DCO) pluggable transceivers for high-speed datacenter interconnects and metro networks.

A big driver of this new product is a response to how Artificial Intelligence (AI) and machine learning (AI/ML) applications are accelerating the growth of datacenter traffic in cloud networks. This creates new demands for bandwidth upgrades in data center interconnects and optical transport networks.

The 140 GBaud IC‑TROSA from Coherent offers 800 Gbps ZR/OpenZR+ transmission in data center interconnects and metro communications networks in the ultra-dense QSFP-DD and OSFP pluggable form factors. As a highly integrated coherent optics subassembly with embedded optical amplification that can deliver high transmitter output power with low power dissipation, IC‑TROSA allows DCO modules that can plug directly into routers. This solution lowers the total cost of network ownership for hyperscalers and service providers by eliminating an entire layer of transponder equipment.

This latest offering is just a series of IC-TROSA products Coherent offers. In March 2020, Coherent introduced the 64 GBaud IC-TROSA. “We continue to advance the state of the art of optical transmission in core networks by leveraging the inherent capabilities of our indium phosphide technology platform,” said Matthias Berger, VP of Coherent Technology, at Coherent Corp. “Indium phosphide photonic integrated circuits are differentiated by their high output power, which enables disruptive use cases such as IP-over-DWDM in metro networks.”

Coherent’s IC-TROSA was combined with Marvell’s Orion digital signal processor (DSP) to demonstrate the performance capabilities of a complete transceiver solution for 800 Gbps transmission.

“Marvell’s close collaboration with Coherent has enabled us to showcase the power of the combination of technologies from two leading companies,” said Samuel Liu, Sr. Director of Product Line Management, Coherent DSP at Marvell. “Together, the 140 GBaud IC-TROSA and the Orion coherent DSP enable pluggable transceivers for 800 Gbps with more than 500 km reach, allowing data center interconnects to scale network capacity quickly and economically to accommodate the surging traffic from AI/ML and other distributed, data-intensive workloads.”

The 140 GBaud IC-TROSA is a coherent optical engine with a wavelength-tunable laser, optical amplifiers, modulators, drivers, a coherent mixer, a photodiode array, and transimpedance amplifiers. It features an embedded microcontroller, DAC/ADCs, and a simple digital communication interface for all control and monitoring.

The module supports symbol rates of up to 140 GBaud and multiple modulation formats, including QPSK, 8QAM, 16QAM, 32QAM, and 64QAM. It is designed to meet the requirements of the OIF IC-TROSA Implementation Agreement (Type-2 version). Alpha samples of the 140 GBaud IC-TROSA are available now and the product will be generally available in mid-2024.

For related articles, visit the Optical Tech Topic Center.

For more information on optical components and suppliers, visit the Lightwave Buyer’s Guide.

To stay abreast of optical communications technology, subscribe to Lightwave’s Enabling Technologies Newsletter.

About the Author

Sean Buckley

Sean is responsible for establishing and executing the editorial strategies of Lightwave and Broadband Technology Report across their websites, email newsletters, events, and other information products.

Sponsored Recommendations

New Optical Wavelength Service Trends

July 1, 2024
Discover how optical wavelength services are reshaping the telecom landscape, driven by rapid expansion and adoption of high-speed connections exceeding 100 Gbps, championed by...

ON TOPIC: Innovation in Optical Components

July 2, 2024
Lightwave’s latest on-topic eBook, sponsored by Anritsu, will address innovation in optical components. The eBook looks at various topics, including PCIe (Peripheral...

Data Center Interconnection

June 18, 2024
Join us for an interactive discussion on the growing data center interconnection market. Learn about the role of coherent pluggable optics, new connectivity technologies, and ...

From 100G to 1.6T: Navigating Timing in the New Era of High-Speed Optical Networks

Feb. 19, 2024
Discover the dynamic landscape of hyperscale data centers as they embrace accelerated AI/ML growth, propelling a transition from 100G to 400G and even 800G optical connectivity...