Optical grating coupler

Details Optical grating coupler Optical grating coupler

2006-12-05

2006-12-05

Wells, Nikita (Department: 2881)

Optical waveguides

With optical coupler

Input/output coupler

C385S037000, C385S014000, C385S012000

Reexamination Certificate

active

07146074

ABSTRACT:
An optical grating is disposed on a waveguide to redirect light from the interior of the waveguide through the opposite side of the waveguide from the grating. In one embodiment the waveguide, the grating, and an optical sensor are combined in a single monolithic structure. In another embodiment, an absorbing layer is directly connected to the waveguide in the region of the grating. In still another embodiment, efficiency of the grating is improved by having a high index contrast between the refractive index of the grating and the refractive index of the cladding disposed over the grating, and by having an appropriately sized discontinuity in the grating.

REFERENCES:
patent: 5410622 (1995-04-01), Okada et al.
patent: 5625729 (1997-04-01), Brown
patent: 6285813 (2001-09-01), Schultz et al.
patent: 6490393 (2002-12-01), Zhou
patent: 6845184 (2005-01-01), Yoshimura et al.
Suhara, T, “Integrated Optics Components and Devices Using Periodic Structures” IEEE Journal of Quantum Electronics, vol. QE-22, No. 6, Jun. 1986, 2 pgs.

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