The 400G SR8 optical transceiver consists of 8 channels, with each channel carrying a 53. It adopts PAM4 high-order modulation, and the internal oDSP of the module performs functions such as clock recovery, signal shaping, and conditioning. These modules leverage an 8-channel VCSEL array and PIN photodetectors to deliver 50G PAM4 per channel. A 400G optical module performs photoelectric conversion: With a 400 Gbps transmission rate, these modules support industry evolution from 100M → 1G → 25G → 40G → 100G → 400G → 1T. They form the backbone of high-throughput data center networks and AI clusters. 3cm (Draft) standard and meets the transmission link requirements of 70m OM3 and 100m OM4/OM5. The transceiver uses a standard 16-core multi-mode MPO. The Optical Transceiver Module model CC-QSS110M-SD is a high-performance 400G QSFP-DD SR8 transceiver designed for next-generation data centers and high-speed networking applications. PAM4 allows each symbol to represent two bits of information, effectively doubling the data rate compared to traditional NRZ (Non-Return-to-Zero) modulation 1.
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