Patent ID: 8965155
Filing Date: 2015-02-24
Classification: B82Y,G02B,G02F

Abstract:
1. An optical isolator comprising: a two dimensional (2D) grating coupler comprising first and second waveguides and first and second corresponding gratings, the first grating coupler to direct light having a first polarization component from the first waveguide, the second grating coupler to direct light having a second polarization component that is orthogonal to the first polarization component to the second waveguide; a polarization rotator comprising a rotation angle of 45 degrees in a principle direction; a polarizer configured to pass light having a polarization state of the first polarization state rotated 45 degrees in the principle direction; and an optical coupler to receive light of a first polarization state from the first waveguide and to transmit light of a second polarization state to the second waveguide.