Diffraction gratings and optical branching filter elements

Details Diffraction gratings and optical branching filter elements Diffraction gratings and optical branching filter elements

1985-10-10

1987-06-16

Arnold, Bruce Y.

350 9614, 350 9634, G03H 102, G02B 642

Patent

active

046732411

ABSTRACT:
An optical branching filter element comprised of a substrate having a wave guide thereon of a material capable of reversibly changing its refractive index and an erasable diffraction grating formed on the waveguide. The diffraction grating may be formed by a holographic exposure method or a light beam scanning method and may be erased by suitable erasing means.

REFERENCES:
patent: 4286838 (1981-09-01), Huignard et al.
patent: 4431263 (1984-02-01), Garito
patent: 4515429 (1985-05-01), Smith et al.

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