Theoretical analysis for temperature dependence of laser- induced damage threshold of optical thin films. (March 2016)

• Record Type: Journal Article
• Authors: Mikami, K; Motokoshi, S; Somekawa, T; Jitsuno, T; Fujita, M; Tanaka, KA; Azechi, H
• Is Part Of: Journal of physics. Volume 688(2016)
• Publication Date: 2016-03
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/688/1/012065
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: The temperature dependence of the laser-induced damage threshold on optical coatings was studied in detail for laser pulses from 123 K to 473 K at different temperatures. The laser-induced damage threshold increased with decreasing temperatures when we tested long pulses (200 ps and 4 ns). The temperature dependence, however, was reversed for pulses shorter than a few picoseconds (100 fs testing). We propose a scaling model with a flowchart that includes three separate processes: free-electron generation, electron multiplication, and electron heating. Furthermore, we calculated the temperature dependence of laser-induced damage thresholds at different temperatures. Our calculation results agreed well with the experimental results.