High-Speed VCSEL Arrays for 400 Gbit/s Data Center Interconnects

摘要

This paper reviews device design and performance of high-speed vertical cavity surface emitting laser (VCSEL) arrays for next- generation short-reach 400 Gbit/s applications in data centersusing the advanced PAM-4 modulation format. The both 850 nm/900 nm PAM-4 VCSELs have been optimized to improve dynamic performance and suppress noise for PAM-4 transmission. The new VCSELs also show good uniformity of characteristics, which is advantageous for array products.