Low cost fiber optic circulator

Details Low cost fiber optic circulator Low cost fiber optic circulator

1998-05-19

2000-06-13

Turner, Samuel A.

Optics: measuring and testing

By particle light scattering

With photocell detection

356351, G01B 902

Patent

active

060755962

ABSTRACT:
Improved optical devices, systems, and methods for selectively directing optical signals generally based on a Mach-Zehnder interferometer. Through accurate control of the phase relationship, the Mach-Zehnder interferometer allows optical signals to either be cumulatively combined so as to enhance the transmitted signal strength, or destructively combined so as to effectively prevent transmission from an optical signal port. This phase relationship can be controlled using a nonreciprocal device having a pair of retarder plates disposed along one of the two legs of the Mach-Zehnder interferometer so as to provide an optical isolator or circulator.

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