Key manufacturers producing 400G silicon photonics modules include Intel, Cisco, OpenLight Photonics, Tower Semiconductor, InPhi (Marvell), Finisar (II-VI Incorporated), Juniper, Rockley Photonics, and Fujitsu.

Leading Manufacturers and Platforms

Intel has historically been a major player in pluggable optical modules, including 400G silicon photonics solutions, though it has divested parts of its optical module business while continuing to support high-speed data center applications . Cisco produces 400G pluggable optics leveraging its silicon photonics technology, supporting QSFP-DD and OSFP form factors for AI and data center networks, with backward compatibility for 400G ports . OpenLight Photonics, in partnership with Tower Semiconductor, has demonstrated 400G/lane modulators on Tower's integrated silicon photonics platform (PH18DA), offering scalable solutions from 100G to 400G for cloud, AI, and ML applications . This platform supports PAM-4 modulation and low drive voltage operation, making it suitable for high-volume deployment. Other notable manufacturers include InPhi (Marvell), Finisar (II-VI Incorporated), Juniper, Rockley Photonics, and Fujitsu, all of which are active in the 400G silicon photonics market and provide modules for data center, telecom, and high-performance computing applications .

Technological Highlights

• Form Factors: QSFP-DD, OSFP, and other pluggable modules for 400G connectivity.
• Applications: Data centers, AI/ML networks, cloud computing, and long-haul optical communications.
• Integration: Some platforms integrate modulators, lasers, and optical amplifiers on a single photonic integrated circuit (PIC) for compact, power-efficient solutions .
• Scalability: Many manufacturers offer backward-compatible designs, allowing upgrades from 100G/200G to 400G without redesigning host systems . These manufacturers collectively address the growing demand for high-speed optical interconnects, providing commercially viable 400G silicon photonics modules for both enterprise and hyperscale data center deployments.