Patent ID: 7009770
Filing Date: 2006-03-07
Classification: G02B,G02F,H04J

Abstract:
1. An optical device, comprising: a first polarization beam splitter (PBS); a set of optical rotators optically coupled to the first PBS at a face intersecting a main axis of the device, the set of optical rotators comprising a non-reciprocal optical rotator (NRR) and a reciprocal optical rotator (RR); a second PBS optically coupled to the set of optical rotators at a side opposite to the first PBS; a non-linear interferometer (NLI) optically coupled to the second PBS at a side opposite to the set of rotators for reflecting a linearly polarized light comprising a first set of channels and a second set of channels, wherein the first set of channels is reflected without a polarization plane rotation, wherein the second set of channels is reflected with a polarization plate rotation; a first optical port optically coupled to the first PBS at a side opposite to the set of optical rotators; a second optical port optically coupled to a face of the first PBS not intersecting the main axis; and a third optical port optically coupled to the second PBS at a face not intersecting the main axis.