Planar waveguides made by use of photosensitive changes to the r

Details Planar waveguides made by use of photosensitive changes to the r Planar waveguides made by use of photosensitive changes to the r

1997-03-07

1998-11-24

Palmer, Phan T. H.

Optical waveguides

Planar optical waveguide

385131, 385132, 216 74, 216 80, 65444, 65448, G02B 610

Patent

active

058419284

ABSTRACT:
Planar waveguides are produced by using radiation to write path regions into a photosensitive layer. Originally, the photosensitive layer had the same refractive index as the confining regions, e.g., it consists of silica doped with oxides of Ge and B. Composite path regions are produced by depositing a glass soot onto a partial region. On sintering the soot melts to fill up the empty spaces and thereby create a composite layer.

REFERENCES:
patent: 5141549 (1992-08-01), Tumminelli
Mizrahi et al, "Ultraviolet Laser Fabrication of Ultrastrong Optical Fiber Gratings and of Germania-Doped Channel Waveguides", Applied Physics Letters, vol. 63, No. 13, 27 Sep. 1993, New York, pp. 1727-1729.
Barbarossa et al, "Vertically Integrated High-Silica Channel Waveguides on Si", Electronics Letters, vol. 28, No. 5, 27 Feb. 1992, Stevenage, GB, pp. 437-438.

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