Patent ID: 7068862
Filing Date: 2006-06-27
Classification: G02B,G02F

Abstract:
1. A method of controlling polarization dependent properties of an integrated a waveguide structure: providing a high index difference waveguide structure having a core and cladding having an effective index greater than or equal to 0.3; changing symmetry of the index of said cladding around the core of the waveguide to alter the cross-sectional symmetry of said waveguide by changing substantially the index on one axis of symmetry of said high index difference waveguide while the index on another axis of symmetry is hardly changed at all or is changed with opposite sign with respect to the index profile in the other axis of symmetry; changing birefringence of said cladding or the core of the waveguide to change the cross-sectional symmetry of said wave guide; and changing absorption of the index of said cladding around the core of the waveguide to alter the polarization dependent loss of said waveguide.