AI Article Synopsis
- Researchers are investigating how to create photochemical two-photon Bragg gratings in hydrogenated fibers without causing stress damage from UV light in the core or cladding.
- The introduction of color-centers, under specific UV femtosecond irradiation, is solely responsible for changes in refractive index without inducing additional stress.
- When fibers are not hydrogen-loaded, significant stress and glass compaction occur in both the core and cladding, but no changes in inelastic strains are seen unlike in fibers that are hydrogen-loaded.
Article Abstract
We report on photochemical two-photon Bragg grating preparation in hydrogenated fiber without any UV-induced stress in the core or cladding, leaving only the color-center model responsible for refractive index changes for UV femtosecond irradiation. Without hydrogen loading strong stress changes are observed in the core and in the cladding indicating glass compaction. The irradiation does not change the inelastic strains, in contrast to H(2)-loading.
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| http://dx.doi.org/10.1364/oe.15.005610 | DOI Listing |
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