Abstract
Volume holographic gratings are written with ultraviolet light in high-optical-quality, commercially available Ge-doped silica films and in Ge-doped optical-fiber preform sections loaded with molecular hydrogen. In the film samples, peak refractive-index changes exceeding 10−2 and a sensitivity (index change/absorbed energy density) of 0.4 × 10−7 cm3/J are measured. Angular multiplexing of up to 51 gratings is demonstrated in the preform samples.
© 1995 Optical Society of America
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