Patent ID: 7206465
Filing Date: 2007-04-17
Classification: G02B

Abstract:
1. An all-fiber, all-states of polarization, linear design depolarizer for depolarizing a light source, which comprises: a) a first polarization combiner with two inputs and two outputs; b) a directional coupler connected to said first polarization combiner by two branches extending from the outputs of the first polarization combiner, one of the branches between the coupler and the first polarization combiner having means adapted to produce an optical phase delay greater than the coherence length of the light source, and each of the two branches having a polarization rotator means adapted to make the polarization in the two branches parallel and aligned with one eigen axis of the first polarization combiner; and c) a second polarization combiner following the coupler and connected by two branches to said coupler, one of the branches between the coupler and the second polarization combiner having means adapted to produce an optical phase delay greater than the coherence length of the light source, and also having a polarization rotator means adapted to maintains a half wave length.