This article unpacks the technologies powering this leap (silicon photonics, advanced modulation, and co-packaged optics), compares deployment paradigms, and delivers a tactical upgrade roadmap that balances performance, cost, and scalability. When replacing an optical module, do not look into the optical port without eye protection. The device must use optical modules recommended on the configurator because non-Huawei-certified optical modules cannot ensure transmission reliability. With 400G modules now the baseline, 800G adoption is surging—especially across AI and hyperscaler environments—while 1. Its primary function is to achieve optoelectronic conversion by converting electrical signals into optical signals and vice versa. An. Connect the connectors of the fiber-optic cable to the transceiver module. Open the bail latch by rotating it 90 degrees, grasp the transceiver module, and then carefully pull the module. The optical module is one of the core devices of the optical communication system, and its development has a vital impact on its related industrial chain, from the upstream industry chip substrate, PCB to the downstream telecom market and data communication market, and the field of lidar driverless.