Fiber-to-waveguide coupler

Details Fiber-to-waveguide coupler Fiber-to-waveguide coupler

2006-06-20

2006-06-20

Font, Frank G. (Department: 2883)

Optical waveguides

With optical coupler

Input/output coupler

C385S044000, C385S047000, C385S050000, C359S563000, C398S087000

Reexamination Certificate

active

07065272

ABSTRACT:
An optical waveguide to fiber coupler comprises a substrate, a first waveguide and a second waveguide. The first and second waveguides are formed on the substrate and intersect at a right angle. A diffraction grating structure is formed at the intersection of the first and second waveguides, such that, when the coupler is physically abutted with a single mode optical fiber, in operation, a polarization split is obtained that couples orthogonal modes from the single-mode optical fiber into single identical modes in the first and second waveguides. Also, employing the coupler in optical polarization diverse applications provides for implementing a polarization insensitive photonic integrated circuit using such diffraction grating structures, such as, for example, photonic crystals.

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