Optical Circulators and Gratings
An optical circulator is a three- or four-port designed such that entering any port exits from the next. This means that if light enters port 1 it is emitted from port 2, but if some of the emitted light is reflected back to the circulator, it does not come out of port 1 but. What is a Faraday Circulator? Figure 1: Symbol for a three-port Faraday circulator.
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