Generation of UV-defects in UV fibers: comparison between different pulsed UV lasers

Stefan Heiden; Philipp Raithel; Karl-Friedrich Klein; Georg Hillrichs

doi:10.1117/12.2597970

19 November 2021 Generation of UV-defects in UV fibers: comparison between different pulsed UV lasers

Stefan Heiden, Philipp Raithel, Karl-Friedrich Klein, Georg Hillrichs

Proceedings Volume 11910, Laser-Induced Damage in Optical Materials 2021; 119100O (2021) https://doi.org/10.1117/12.2597970
Event: SPIE Laser Damage, 2021, Online Only

Abstract

Temporal and spectral Laser-induced UV-loss studies in DUV-fibers with undoped synthetic silica core, mainly low-OH silica and modifications, were carried out with an automated set-up using pulsed 213 nm, 266 nm and 355 nm Nd-YAG Lasers. A multiple Gaussian band approximation was used to separate the individual but superimposed optically active UV defects leading to new temporal results of the individual UV defects. The curve shape of spectral losses was found to be different and strongly influenced by the Laser wavelengths, which are within absorption bands in low-OH silica, reducing the correlated defect at the beginning of irradiation significantly. In addition to solarization caused by 266 nm Laser damaging, annealing of some defects was observed. Depending on the fiber type, including hydrogen-treated types, different time constants were determined. Obvious transformations were observed during damaging with Lasers and/or broadband D₂-lamp. Finally, an improved fitting of the UV attenuation or UV-induced losses in UV-fibers around 250 nm (ODC-II region) was possible by introducing two bands with slightly different peak wavelengths and temporal behaviors.

Conference Presentation

Citation Download Citation

Stefan Heiden, Philipp Raithel, Karl-Friedrich Klein, and Georg Hillrichs "Generation of UV-defects in UV fibers: comparison between different pulsed UV lasers", Proc. SPIE 11910, Laser-Induced Damage in Optical Materials 2021, 119100O (19 November 2021); https://doi.org/10.1117/12.2597970

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