Lasers, Fiber Optics, and Communications

Optical modulation study of repaired damage morphologies of fused silica by scalar diffraction theory

[+] Author Affiliations
Bo Li, Qingyan Zhou, Xia Xiang

University of Electronic Science and Technology of China, School of Physical Electronics, No. 4, Segment 2, North Jianshe Road, Chenghua District, Chengdu 610054, China

Yong Jiang

Southwest University of Science and Technology, Laboratory for Extreme Conditions Matter Properties, No. 59, Middle Segment of Qinglong Avenue, Pucheng District, Mianyang 621010, China

Wei Liao, Xiaolong Jiang, Haijun Wang, Xiaoyu Luan, Wanguo Zheng, Xiaodong Yuan

China Academy of Engineering Physics, Research Center of Laser Fusion, No. 64, Mianshan Road, Youxian District, Mianyang 621900, China

Opt. Eng. 56(1), 016113 (Jan 19, 2017). doi:10.1117/1.OE.56.1.016113
History: Received September 23, 2016; Accepted December 27, 2016
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Abstract.  The cone and Gaussian repaired damage craters are two typical morphologies induced by CO2 laser evaporation and nonevaporation technologies. The mathematical models are built for these two types of repaired craters, and the light modulation at 355 nm induced by the millimeter-scale repaired damage morphology is studied by scalar diffraction theory. The results show that the modulation of the Gaussian repaired morphology has one peak and then decreases with the increasing distance from 0 to 30 cm. While the modulation for cone repaired morphology remains stable after decreasing quickly with the increasing distance. When the horizontal radius increases, the modulation looks like a saw-tooth. However, the modulation has irregular variations for two kinds of morphologies with the increasing vertical depth. The simulated results agree well with experimental results. The horizontal and vertical dimensions, and downstream distance have different influences on the modulation. The risk of damage to downstream optical components can be suppressed to improve the stability of the optical system if the shape and size of repaired craters are well controlled and the positions of downstream optical components are selected appropriately.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Bo Li ; Qingyan Zhou ; Yong Jiang ; Xia Xiang ; Wei Liao, et al.
"Optical modulation study of repaired damage morphologies of fused silica by scalar diffraction theory", Opt. Eng. 56(1), 016113 (Jan 19, 2017). ; http://dx.doi.org/10.1117/1.OE.56.1.016113


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