Study on the laser-induced damage characteristics and structure changes of fluorotellurite glass under femtosecond pulsed laser irradiation
Source abstract
Abstract
TeO 2-ZnF 2-BaF 2-Ta 2O 5 fluorotellurite glasses have excellent optical properties and stability which makes them promising candidates for mid-infrared (mid-IR) fiber applications. In this work, the properties and structure of fluorotellurite glasses with gradient change of BaF 2 content were compared. Under the irradiation of femtosecond (fs) laser, the potential relationship between fs laser-induced damage characteristics, glass composition and structural property were systematically studied. The fs laser-induced damage threshold (FLIDT) of investigated fluorotellurite glass samples increased from 892.45 mJ/cm 2 by more than one-third to 1223.84 mJ/cm 2 and the attenuation coefficient of multi-pulse FLIDT increases from 7.69 to 25.29 with the increase of [TeO 3] content from 0.312 to 0.565 induced by increasing BaF 2 content. Further, structural transformation from TeO 4 units to TeO 3 units in the glass network triggered by fs laser irradiation is confirmed by Raman spectra measurements. This study provides theoretical guidance for tailoring the fs laser damage threshold through glass microstructural modulation by composition optimization, which is of great importance to improve the output power in mid-IR supercontinuum (SC) spectra and rare earth (RE) doped fiber laser systems.
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Research context
OpenAlex topics: Laser Material Processing Techniques · Glass properties and applications · Cultural Heritage Materials Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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