An optical switch is a device that controls the flow of light signals between different paths. At their simplest, they operate as on/off gates, allowing light to pass with low insertion loss in the open state and blocking transmission (causing high insertion loss) when closed. Figure: Optical Switch. 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. Micro-electro-mechanical systems (MEMS) are miniature electrically operated mechanical devices which can be constructed using the same materials and similar processing techniques as for large scale integrated electronic components.
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