Waveguide Polarization Rotator and Method of Construction Thereof

摘要

An embodiment waveguide polarization rotator includes an optical waveguide and an overlay strip. The optical waveguide has an input end and an output end oppositely disposed thereon. The optical waveguide is operable to receive, at the input end, an input optical signal having a mode having an input polarization. The optical waveguide is further operable to generate, at the output end, an output optical signal having an output polarization orthogonal to the input polarization. The overlay strip is disposed over and non-orthogonally crosses the optical waveguide. The overlay strip has a first end laterally offset from the optical waveguide by a first offset distance and a second end laterally offset from the optical waveguide by a second offset distance.

主权项

1. A waveguide polarization rotator, comprising:
an optical waveguide having an input end and an output end oppositely disposed thereon, the optical waveguide operable to:
receive, at the input end, an input optical signal having a mode having an input polarization, andgenerate, at the output end, an output optical signal having an output polarization orthogonal to the input polarization; and an overlay strip disposed over and non-orthogonally crossing the optical waveguide, and having a first end laterally offset from the optical waveguide by a first offset distance and a second end laterally offset from the optical waveguide by a second offset distance, wherein the optical waveguide has a waveguide width and the overlay strip has an overlay width no greater than the waveguide width.