Enhanced UV photosensitivity in boron codoped germanosilicate fibres
1993
Boron codoped germanosilcate fibres are shown to be highly photosensitive. A UV written 1-53 μm Bragg grating with 95% reflectivity and a 1-1 nm bandwidth is formed with a UV intensity as low as 1 W/cmz in only 10 min
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