Optical waveguides – Having particular optical characteristic modifying chemical... – Of waveguide core
Patent
1992-06-26
1994-02-08
Gonzalez, Frank
Optical waveguides
Having particular optical characteristic modifying chemical...
Of waveguide core
501 55, 501 72, 501 32, 385129, 430616, 430617, 430608, 428428, 428701, 428410, 359885, G02B 600
Patent
active
052855171
ABSTRACT:
The invention relates to a high energy beam-sensitive glass (HEBS glass) exhibiting insensitivity and/or inertness to actinic radiation. Silver ion exchange in acidic aqueous solution results in a slab waveguide having a constant refractive index in the thickness dimension. Low loss single mode as well as multimode waveguides were fabricated with a great precision in the designed thickness and step index .DELTA.n. Channel waveguides were patterned and fabricated in one process step within a HEBS glass via a lithographic printing method using a high energy beam. Alternatively, predesigned pattern of channel waveguides were fabricated instantaneously upon direct write with a laser beam pattern generator employing a focused laser beam, within a HEBS glass which has been flood exposed to a high energy beam. The product of the present invention is also suitable for use as a phototool in photolithographic processes, as a glass filter for spatial modulation of light intensity and/or color, as a laser beam direct write recording and archival storage medium, and as a carrier plate of color filters and black matrix of a flat panel display.
REFERENCES:
patent: 4567104 (1986-01-01), Wu
patent: 4670366 (1987-06-01), Wu
patent: 4894303 (1990-01-01), Wu
patent: 5141899 (1992-08-01), Jean et al.
patent: 5212121 (1993-05-01), Omata et al.
Canyon Materials, Inc.
Gonzalez Frank
Ngo John
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