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Open AccessArticle

Experimental Study on the Damage of Optical Materials by out of Band Composite Laser

1
State Key Laboratory of Laser Interaction with Matter, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
2
Key Laboratory of Electro-Optical Countermeasures Test & Evaluation Technology, Luoyang 471003, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(10), 3578; https://doi.org/10.3390/app10103578
Received: 25 April 2020 / Revised: 17 May 2020 / Accepted: 19 May 2020 / Published: 21 May 2020
(This article belongs to the Section Optics and Lasers)
For the paper, experimental studies were performed on the damage of the Ge- and Si-based flat window by lasers out-of-band. The experimental results showed that lasers out-of-band can cause film damage and substrate damage to Ge and Si windows. The high-energy laser damage window mechanism mainly manifested as thermal effects. The composite laser damage thresholds for the substrate were an Si window of 21.6 J/cm2 and a Ge window of 3 J/cm2. Compared with continuous laser and long pulse laser experimental results, it was found that the use of long pulse-continuous composite constitution could effectively reduce the damage threshold. Compared to the long-pulse laser, the composite laser could achieve similar damage effects with a smaller energy density. View Full-Text
Keywords: flat window; high power composite laser; out of band; laser material interaction; damage effect flat window; high power composite laser; out of band; laser material interaction; damage effect
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MDPI and ACS Style

Yang, L.; Lisheng, L.; Wei, T.; Junfeng, S.; Xuelei, L.; Junjie, S.; Ming, S.; Xiangzheng, C. Experimental Study on the Damage of Optical Materials by out of Band Composite Laser. Appl. Sci. 2020, 10, 3578.

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