Patent ID: 6965472
Filing Date: 2005-11-15
Classification: G02B,G02F,Y10S

Abstract:
1. A nonreciprocal optical element comprising: circulator means for routing a first signal from a first port to a second port and a second signal from the second port to a third port; a third signal from the third port to a fourth port and a fourth signal from the fourth port to the first port; first reflective means for reflecting a signal output by the second port back into the second port; second reflective means for reflecting a signal output by the fourth port back into the fourth port; first control means for adjusting the phase of the signal output from the second port by adjusting the position of the first reflective means relative to the second port; second control means, independent of said first control means for adjusting the phase of the signal output from the fourth port by adjusting the position of the second reflective means relative to the fourth port; and a first polarization rotation element between the second port and the first reflective means.