Representing Intel is Richard Jones, Senior Principal Engineer. He leads the laser development team at Intel’s Silicon Photonics Product Division.

https://on24static.akamaized.net/event/26/71/51/1/rt/1/documents/resourceList1602546460149/richardjones1602546458264.pdf

One of the key attributes that you need to connect your laser to silicon photonics die is to look at coupling loss. This is one of the challenges around the remote lasers. For integrated lasers at Intel we measure about .5dB coupling loss between the laser and the silicon photonic waveguide. For remote lasers we are estimating coupling loss to an optical fiber to be about 2dB with a similar coupling loss between the fiber and the silicon photonic chip.  You can tweak these numbers if you can improve the coupling there but you are about 4dB coupling loss for remote lasers which needs to be accounted for and minimized where possible.

POET

POET Launches LightBar™ Solution for Data Centers

December 8th, 2020

Advanced Remote Laser Light Source for Transceivers and Data Center Switches

LightBar products are configured as a Transmit Optical Sub-Assembly (TOSA) incorporating four Continuous Wave (CW) lasers into the waveguide matrix of POET’s proprietary Optical Interposer, meeting the CWDM4 and FR4 technical specifications.  The 400G version is upgradeable to 800G with the incorporation of additional components. The LightBar is completely customizable and can support a wide range of output power from 15mW to 60mW depending on the application. In all cases, LightBar incorporates POET’s proprietary designs and assembly features that deliver an industry-leading laser coupling efficiency of >80% (power loss = <1.0dB), while maintaining wafer-scale integration capability.  These results are significantly better than the best results observed with competing integrated approaches. Better coupling efficiency allows the use of lower power, more reliable lasers to achieve the same output. POET will begin sampling the LightBar product line to customers beginning in Q1 2021.  Following qualification with customers, the Company expects to begin volume production in Q4 of 2021.