High-Speed Semiconductor Laser Technologies for Data Center beyond 400 GbE

DOI

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Other Title
  • 400 GbE超のデータセンタを支える高速半導体レーザ技術

Abstract

The data rate in transceiver module is going to increase from 100 Gbps to 400 Gbps and even to 800 Gbps due to global data traffic increasing. 4-level pulse amplitude modulation (PAM4) format has been standardized for 400 GbE instead of conventional non-return-to-zero (NRZ) format. We review high speed directly modulated DFB lasers and electro-absorption modulator integrated distribute feedback (EA-DFB) lasers technologies for 100 G-PAM4 operation. Additionally, we describe 200 G-PAM4 EA-DFB for 200 Gbps per lane and 384 Gbps-PAM8 EA-DFB for upcoming 400 Gbps per lane.

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