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Optical Circulator
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Optical Circulator
2021-05-15

The Fiber Optical Circulator is a device that is based on the nonreciprocal polarization of an optical signal by Faraday effect. A basic optical circulator is a three-terminal device (or four-terminal device), where terminal 1 is the input port and terminal 2 is the output port, while the reflected signal back into terminal 2 will be redirected to terminal 3 instead of terminal 1.


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Optical circulators have many applications in optical communication systems and optical instrumentations for redirecting optical signals. 


Wave Division Multiplexing System: 

Optical circulators in conjunction with Bragg gratings allow specific wavelengths to be reflected and sent down different paths.

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Duplex Transmitter/Receiver System:

Optical circulators can be used to enable 2-way transmission along a single fiber. Transmitter 1 sends signal through Port 1 of Circulator 1 and through the fiber to Port 2 of Circulator 2 so that it is directed to Receiver 2. The signal from Transmitter 2 follows the opposite path to Receiver 1.


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Fiber Bragg gratings:

Since the reflection characteristic of a fiber Bragg grating can be used either as a bandpass optical filter or as a dispersion compensator, an optical circulator has to be used to redirect the reflected optical signal into the output. 

 

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For more detail information, please contact  sales@corephy.com


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