213 nm Nd-YAG pulsed laser damage of non-loaded and hydrogen-loaded silica-based fibers

Stefan Heiden; Philipp Raithel; Rahul Yadav; Karl-Friedrich Klein

doi:10.1117/12.2574380

20 October 2020 213 nm Nd-YAG pulsed laser damage of non-loaded and hydrogen-loaded silica-based fibers

Stefan Heiden, Philipp Raithel, Rahul Yadav, Karl-Friedrich Klein

Proceedings Volume 11514, Laser-induced Damage in Optical Materials 2020; 115141Q (2020) https://doi.org/10.1117/12.2574380
Event: SPIE Laser Damage, 2020, Online Only

Conference Poster

Abstract

An automated set-up for 213 nm UV laser damaging in parallel to spectral analyses will be used to show the spectral laser damaging in silica-based fibers with low hydroxyl content. The 213 nm wavelength is ideal, because it is close to the peak wavelength of one of the E’-centers in silica. Due to automation, short-term measurements down to 0.5 s and long-term measurements up to 2 days and more are possible. In addition, the spectral transmission changes are fitted with multiple Gaussian shaped bands. Although the basic attenuation in non-loaded fibers is high, the pulse energies are still high enough to generate defects along a 1 m long fiber. For the first time, to our knowledge, a transfer from E’γ to E’γ is observed within 1 s, with a laser repetition rate of 2 kHz. Due to optimal fitting, a band around 180 nm is likely influencing the UVC region. In hydrogen-loaded fibers, similar UV defects are seen. The related absorption bands can be optimally adopted to measurement results. The E’-centers play a minor role in short-term measurements because these defects are passivated during hydrogen-loading. Additionally, the band at 328 nm due to molecular chlorine will be reduced. The temporal behavior of all absorption band, including the predicted 180 nm band, are shown.

Conference Presentation

Citation Download Citation

Stefan Heiden, Philipp Raithel, Rahul Yadav, and Karl-Friedrich Klein "213 nm Nd-YAG pulsed laser damage of non-loaded and hydrogen-loaded silica-based fibers", Proc. SPIE 11514, Laser-induced Damage in Optical Materials 2020, 115141Q (20 October 2020); https://doi.org/10.1117/12.2574380

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