A method of forming a refractive index grating in an optical...

Details A method of forming a refractive index grating in an optical... A method of forming a refractive index grating in an optical...

G - Physics

02

B

G02B 5/18 (2006.01) G02B 6/12 (2006.01) G02B 6/124 (2006.01) G02B 6/34 (2006.01) H01S 3/067 (2006.01) G02B 6/16 (1990.01)

Patent

CA 2080020

An optical fibre (2) is fixed against a first face (4) of a prism (5). A coherent beam of optical radiation (7) is directed at the prism (5) such that a portion B propagates directly to the first face (4) while a second portion (A) propagates via total internal ref- lection at a second face (8). The interference of the two portions creates a refractive index grating in the fibre (2) at a wavelength longer than that of the radiation (7). The method provides a stable and simple method of sidewriting of waveguide gratings.

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