Patent ID: 7085441
Filing Date: 2006-08-01
Classification: G01C

Abstract:
1. An apparatus comprising: an optical circuit device having at least one input coupled to a light source, at least two outputs and a birefringent crystal substrate waveguide having a first birefringence axis, between said input and said outputs; a connecting fiber having a second birefringence axis at an angular displacement of approximately 45 degrees to said first birefringence axis, connected to said at least one input of said optical circuit device; a loop of polarization maintaining optic fiber having having first and second ends where one of the first and second ends is connected to one of the at least two outputs and the other of the first and second ends is connected to the other of the at least two outputs, the first and second ends each having a birefringence axis at an angular displacement of approximately 0 degrees to said first birefringence axis; the optical circuit device, connecting fiber and loop cooperating to form a Lyot-type depolarizer.