1300 nm DFB laser for silicon photonics

1300 nm DFB laser for silicon photonics

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By Nick Flaherty

Coherent has launched a 1300nm high-power continuous wave (CW) distributed feedback (DFB) laser diodes for silicon photonics-based datacom pluggable transceivers.

Cloud and AI service providers are ramping up deployments of 400G and 800G transceivers for their megascale datacentre buildouts, with an eye on 1.6T transceivers in the future. Coherent is introducing high-power CW DFB laser diodes that enable 400G to 1.6T silicon photonics-based transceivers, which are among the transceiver technology platforms deployed in the datacentere mid-reach range of 500 m to 2 km.

“Coherent continues to advance the state of the art in indium phosphide semiconductor laser technology that will enable the cloud to continue to rapidly and sustainably scale capacity,” said Dr. Kou-Wei Wang, VP and General Manager, Indium Phosphide & Integrated Circuits Business Unit. “While our new lasers are ideally suited for today’s high-speed silicon photonics-based pluggable transceivers, including our own designs, they are also perfect for future co-packaged optics applications.”

The new lasers achieve 100 mW of output power when uncooled and 300 mW of output power when cooled, to enable 100 Gbit/s and 200 Gbit/s per lane, respectively, for DR4 and DR8 transceivers. They are available in four coarse wavelength division multiplexing (CWDM) wavelengths for FR4 transceivers.

Coherent has a range of optoelectronics for datacom transceivers, including CW lasers, directly modulated lasers (DMLs), electroabsorption-modulated lasers (EMLs), vertical-cavity surface-emitting lasers (VCSELs), high-speed detectors, and power monitors. Coherent offers a full complement of driver and clock data recovery (CDR) integrated circuits. Coherent also offers a broad portfolio of WDM, LAN-WDM, and CWDM subassemblies.

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