I haven't looked at SilTerra's website in quite some time, it looks like it has been updated recently. Interesting note in their End Market section (bold is mine):
Optical Data Communications
Surging cloud applications are driving the growth in data centre traffic.
This, in turn, is creating the need for high speed networks and next-generation optical connectivity in data centers so that they can continue to support the growing intensity of bandwidth and computing requirements in networks which are now primarily optical in nature.
Traditionally, the biggest challenge to cloud adoption has been security. Now, however, with increased innovation in security, the benefits of cloud computing are becoming more tangible. The growth in IoT is expected to bring rise to applications such as smart cars, connected health and smart cities, all of which will require high-end computing and storage solutions in data centers.
Silicon photonics is expected to be a key enabler in meeting the demands of future data centers as well as long-haul communications.
Since early 2017, SilTerra has been fabricating silicon photonics chips on our CMOS line. These chips are capable of supporting optical transceiver modules which handle data bandwidths of up to 100Gbps. Our partnerships with game-changers in technology is now seeing us support the development and fabrication of chips capable of handling data bandwidths of 400 Gbps and beyond.
https://www.silterra.com/end-markets/end-markets#section03
