Fiber Optic Switch Principle
The simplest device is an on/off switch with one input and one output, which allows light to pass with low insertion loss when open, and blocks it completely (or at least causes high insertion loss) when. Fiber-optic switches control light paths within fiber optics, ranging from simple on/off types to complex matrix configurations like 64×64. A fiber optical switch, also known as a fiber channel switch or a SAN (Storage Area Network) switch, is a high-speed network transmission relay device. Fiber-optic networks that carry multiple wavelengths of light simultaneously through a single fiber (a technique called wavelength-division multiplexing) rely on optical switches to route individual wavelengths to different destinations. It is the basic component of the optical switching system in the optical fiber communication system, and is widely used in dry optical path monitoring systems and optical fiber sensing.
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