Optical grating and method of manufacture

Details Optical grating and method of manufacture Optical grating and method of manufacture

1981-06-29

1984-11-13

Lee, John D.

350 9619, 35016217, G02B 518

Patent

active

044822073

ABSTRACT:
An optical grating is provided by the deposition of thin layers of alternating materials on a substrate, the cross-section of which provides a three-dimensional grating. In one embodiment an alternating layered structure is provided by vacuum deposition of optically differing materials on a planar substrate, thereby to provide alternating layers defining planes parallel one to the other. The resulting structure is sectioned and polished such that the exposed adjacent ends of the alternating layers provide either a reflective or transmission grating of exceptional precision and accuracy due to the linear sharply-defined interfaces between adjacent exposed layers. In one embodiment, the finished structure is utilized as an optical coupler for coupling light into and out of an optical integrated circuit. In another embodiment, the grating is incorporated into a substrate over which an optical waveguide or an electro-optical element may be formed.

REFERENCES:
patent: 3484153 (1969-12-01), Hunt et al.
patent: 3674336 (1972-07-01), Kogelnik
patent: 3891302 (1975-06-01), Dabby et al.
patent: 3968789 (1972-10-01), Wolber
patent: 4194162 (1980-03-01), Uematsu
patent: 4281894 (1981-08-01), Guha

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