For 400G VCSEL applications, top brands include Lumentum, Princeton Optronics, and Coherent, offering high reliability, bandwidth, and suitability for short-reach multimode optical interconnects.

Leading VCSEL Manufacturers

• Lumentum Holdings Inc.: Offers a broad portfolio of VCSELs optimized for 3D sensing, mobile, and automotive applications. Their devices provide flexibility in wavelength and output power, making them suitable for high-speed 400G multimode transceivers in data centers and AI networks .
• Princeton Optronics: Specializes in high-power VCSELs with wafer-level manufacturing, ensuring superior reliability and design flexibility. Their VCSELs are ideal for LIDAR, 3D sensing, and short-reach optical interconnects .
• Coherent: Recently developed lithographic-aperture VCSELs capable of achieving bandwidths up to 45 GHz, paving the way for 200G per lane and 400G multimode optical transceivers. These devices are highly reproducible and reliable, making them suitable for AI, HPC, and data center applications .
• VIGO Photonics: Focuses on IR spectrum VCSELs, particularly 850 nm devices for telecom and datacom, with precise epitaxial layer control for high performance and mass production .
• Inneos: Provides high-reliability VCSELs for harsh environments, supporting wide temperature ranges and high-speed optoelectronic sensing, which can be advantageous for industrial 400G deployments .

Key Considerations for 400G VCSEL Selection

1. Bandwidth: For 400G multimode transceivers, VCSELs with bandwidths above 25–30 GHz are preferred to support high-speed modulation .
2. Wavelength: 850 nm VCSELs are standard for short-reach multimode fiber links in data centers .
3. Reliability: Wafer-level testing and lithographic-aperture designs improve device uniformity and long-term stability .
4. Application Fit: VCSELs excel in short-reach links (up to a few hundred meters), making them ideal for intra-data center 400G connections .

Recommendation

For 400G multimode optical interconnects, Lumentum, Princeton Optronics, and Coherent are currently the most recognized brands due to their high bandwidth, reliability, and proven performance in data center and AI networking environments. Selection should also consider the specific link distance, power requirements, and environmental conditions.