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Laser-induced damage of Ta2O5/SiO2 narrow-band interference filters under different 1064 nm Nd:YAG laser modes |
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| Authors: | Weidong Gao Meiqiong Zhan Shuhai Fan Janda Shao Zheng-Xiu Fan |
| Institution: | R&D Center for Optical Thin Flim Coatings, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, No. 390, Qinghe Road, Jiading, P.O. Box 800-211, Shanghai 201800, China |
| Abstract: | The laser-induced damage (LID) behavior of narrow-band interference filters was investigated with a Nd:YAG laser at 1064 nm under single-pulse mode and free-running mode. The absorption measurement of such coatings was performed with surface thermal lensing (STL) technique. The damage morphologies under the two different laser modes were also studied in detail. It was found that all the filters exhibited a pass-band-center-dependent absorption and laser-induced damage threshold (LIDT) behavior, but the damage morphologies were diverse. The explanation was given with the analysis of the electric field distribution and the operational behavior of the irradiation laser. |
| Keywords: | Laser-induced damage Narrow-band interference filter Single-pulse laser Free-running laser |
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