Optical coupler

Details Optical coupler Optical coupler

1976-12-16

1978-07-25

Corbin, John K.

350162R, G02B 514

Patent

active

041025601

ABSTRACT:
A pair of diffraction gratings are disposed between a fiber and a waveguide carried by a substrate. The gratings each have a common spatial frequency component that couples light between the fiber and the waveguide. Light from the gratings establish first and second components of an electromagnetic field that extend into the substrate. The gratings are constructed and positioned to cause the first and second components to be of substantially equal amplitude and opposite phase thereby inhibiting a coupling of light into the substrate.

REFERENCES:
patent: 3674336 (1972-07-01), Kogelnik
patent: 3912363 (1975-10-01), Hammer
patent: 3982810 (1976-09-01), Tamir et al.
patent: 4018506 (1977-04-01), Hammer
IBM Tech. Disc. Bulletin, vol. 13, No. 9, Feb. 71, pp. 2529-2530, article by Ash et al.

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