Patent ID: 9170438
Filing Date: 2015-10-27
Classification: G02B,G02F

Abstract:
1. A device comprising: a first waveguide, including a curved section having a first width, the first width having polarization conversion of light over the curved section of the first waveguide; and a second waveguide, including a curved section having a second width, the second width being different than the first width and the second waveguide being spaced from the first waveguide, the second width having reduce polarization conversion of light over the curved section of the second waveguide, the reduction of polarization conversion in the first and second waveguides being relative to resonant polarization conversion that would otherwise occur if the first and second waveguides were of equal width, where the first width has a value, such that a first arc-length of the curved section of the first waveguide is a first integer multiple of a first beat length of the first waveguide, and where the second width has a value, such that a second arc-length of the curved section of the second waveguide is a second integer multiple of a second beat length of the second waveguide, where the first waveguide includes a first straight section, connected to the curved section of the first waveguide; and wherein the curved section of the first waveguide has an associated change in optical path length which would not be present in an absence of the first arc-length having the first integer multiple of the first beat length, a width of the first straight section offsetting the change in the optical path length of the first waveguide, and