An all-optical DCN utilizes optical cross-connect (OXC) technology. OXC technology offers benefits such as low power consumption, low latency, high density, and high reliability, making it a valuable solution for addressing challenges in intelligent computing DCs during the AI era. A data center network (DCN) is an interconnection network consisting of network devices such as switches, firewalls, and routers in a DC. As we all know, a DC is a centralized place for storing, managing, and processing large amounts. The latest optical-DCN designs deliver up to 4-times the bandwidth and consume only 23%–26% power of a cost-equivalent electrical DCN. FEC (Forward Error Correction), DSP (Digital Signal Processing), CDR (Clock and Data Recovery), DRV (Driver), TIA (Trans-Impedance Amplifier), TOSA (Transmitter Optical Sub-Assembly), and ROSA (Receiver Optical Sub-Assembly). Low latency: Reduces processing and recovery time by eliminating stages. This paper first summarizes the topologies and traffic characteristics in data centers and analyzes the reasons and importance of moving to optical switching. Recent techniques related to the optical switching, and main challenges limiting the practical deployments of optical switches in data. In the AI era, Huawei provides a full range of GE to 800GE optical modules, featuring three major capabilities: Spanning (ultra-long transmission), Stable (ultra-high reliability), and Secure (ultra-solid security). According to third-party research, the avera le to meet the increasing traffic requirements posed by traffic floods.
