Patent ID: 6075596
Filing Date: 2000-06-13
Classification: G02F

Abstract:
An optical device comprising:a first optical element disposed in a first optical path of a first optical signal so as to direct a portion of the first signal along a first optical path leg and a portion of the first signal along a second optical path leg;a second optical element optically coupled to the first and second legs, the second element constructively combining the first signal portions to transmit the first signal along a second optical path, the second element directing a portion of a second optical signal from the second path along the first leg, and a portion of the second signal along the second leg;a Faraday rotator disposed along the first leg or the second leg;first and second retarder plates disposed along the first leg, wherein the retarder plates are arranged relative to each other such that the first element destructively combines the second signal portions to diminish transmission of the second signal along the first optical path.