G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 5/18 (2006.01) G02B 5/08 (2006.01) G02B 6/124 (2006.01) G03H 1/02 (2006.01) G03H 1/04 (2006.01) G03H 3/00 (2006.01) G02B 6/16 (1990.01)
Patent
CA 2134771
2134771 9420868 PCTABS00033 A method for manufacturing optical components having a periodic or quasi-periodic structure such as diffraction gratings, volume holograms or distributed feedback mirrors in optical fibres. An optical medium is subjected to acoustic waves which induce periodic or quasi-periodic changes in the optical properties of the medium, the changes being at least partially retained on removal of the waves. The changes may result from stress associated with the antinodes of an acoustic standing wave, alternatively the stress distribution associated with a travelling acoustic wave in an electro-viscous liquid may be semi-permanently retained by the solidification of the material resulting from the application of an electric field.
Findlay Ewan D.
Maitland Arthur
Sutton Philip
Fetherstonhaugh & Co.
The Secretary Of State For Defence In Her Britannic Majesty's Go
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