Micro-optics couplers use individual optical elements such as prisms, lens, mirrors, etc. These elements divide the input optical signal into two or more separated light beams. An optocoupler, also known as photocoupler or opto-isolator, is a device which can transfer an electrical signal across two galvanically-isolated circuits by way of optical coupling. Unlike transformers or capacitors, which can only transfer AC signals across the isolation barrier, optocouplers can. Optical Fiber Communication 10EC72 Page 94 Fiber Alignment In any fiber optic communication system, in order to increase fiber length there is need to joint the length of fiber. The interconnection of fiber causes some loss of optical power. They can be the interface between devices in a system or can be important. It involves the transfer of power between different circuit components, the split or combination of power from multiple locations, and (de)multiplexing of signals with varying frequencies.
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