Bragg gratings in waveguides

Details Bragg gratings in waveguides Bragg gratings in waveguides

1996-05-15

1998-03-24

Breneman, R. Bruce

Etching a substrate: processes

Forming or treating optical article

216 66, 430 5, 359569, G02B 610, B44C 122

Patent

active

057308888

ABSTRACT:
A phase grating mask is placed in-contact or near contact with an optical waveguide to make a blazed grating in the waveguide. A band of grating elements are defined across a surface of the mask such that in the plane of the surface each element is formed at a predetermined blaze angle to a central longitudinal axis of the band. The grating is made by aligning the waveguide with the axis of the band and irradiating the phase mask. Gratings may be formed in a single step, or in several steps by moving the mask relative to the waveguide after each irradiation. The mask may be formed on a substrate by electron beam lithography.

REFERENCES:
patent: 4842633 (1989-06-01), Kuribayashi et al.
patent: 5116461 (1992-05-01), Lebby
patent: 5327515 (1994-07-01), Anderson et al.
patent: 5340637 (1994-08-01), Okai et al.
patent: 5367588 (1994-11-01), Hill et al.

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