It systematically analyzes the causes, solutions, and preventive measures for 10 typical issues of optical switches, provides a 20-item selection checklist covering performance parameters, environmental adaptability, compliance requirements, and other dimensions, and offers. It systematically analyzes the causes, solutions, and preventive measures for 10 typical issues of optical switches, provides a 20-item selection checklist covering performance parameters, environmental adaptability, compliance requirements, and other dimensions, and offers. Mechanical Optical Switches: Switching times typically range from 1-10ms, suitable for long-distance transmission scenarios where latency is not critical (such as backbone network protection switching). Solid-State Optical Switches: Based on thermooptic or electrooptic effects, response time can be. Optical switches are photonics devices that selectively direct optical signals from one or more input ports to one or more output ports, or simply block/transmit a beam. 2 dB), fastest switching speed (10 ns), broadest wavelength range (300–2400 nm), widest fiber compatibility, highest optical power handling (50 W), and space-qualified reliability. 1State Key Laboratory of Information Photonics and Optical Communications (IPOC), Beijing University of Posts and Telecommunications, 10 Xitucheng Rd, Bei Tai Ping Zhuang, Haidian Qu, Beijing, 100876, China 2IPI-ECO Research Institute, Eindhoven University of Technology, 5600MB Eindhoven, The.