Patent ID: 8855449
Filing Date: 2014-10-07
Classification: G02B,G02F

Abstract:
1. An apparatus comprising: an input port to receive light from a fiber; a first and a second output port; and a polarization converter and splitter coupling the input port and the first and second output ports configured such that: wherein the polarization converter and splitter comprises: an input waveguide segment to receive light from the input port; a first output waveguide segment to receive light from the input waveguide segment and to output light to the first output port; a second output waveguide segment to receive light from the input waveguide segment and to output light to the second output port; and a taper section having a changing width increasing along a length to adiabatically convert the light to be output from the second input mode polarization state to the first pure polarization state; and wherein the waveguides of the polarization converter and splitter are disposed for an anti-crossing to occur within the taper section between a mode in the first pure polarization state and a mode in an orthogonal second pure polarization state.