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Optical Engineering • Open Access

Quantitative measurement of CO2 laser-induced residual stress in fused silica optics
Author(s): Liang Yang; Wei Liao; Xinxiang Miao; Xiaodong Yuan; Wanguo Zheng; Haibin Lv; Guorui Zhou; Xiaotao Zu; Xia Xiang

Paper Abstract

The residual stress field of fused silica induced by continuous wave CO2 laser irradiation is investigated with specific photoelastic methods. Both hoop stress and axial stress in the irradiated zone are measured quantitatively. For the hoop stress along the radial direction, the maximum phase retardance of 30 nm appears at the boundary of the laser distorted zone (680-μm distance to center), and the phase retardance decreases rapidly and linearly inward, and decreases slowly and exponentially outward. For the axial stress, tensile stress lies in a thin surface layer (<280  μm) and compressive stress lies just below the tensile region. Both tensile and compressive stresses increase first and then decrease along the depth direction. The maximum phase retardance induced by axial tensile stress is 150 nm, and the maximum phase retardance caused by axial compression stress is about 75 nm. In addition, the relationship between the maximum axial stress and the deformation height of the laser irradiated zone is also discussed.

Paper Details

Date Published: 8 May 2015
PDF: 5 pages
Opt. Eng. 54(5) 057105 doi: 10.1117/1.OE.54.5.057105
Published in: Optical Engineering Volume 54, Issue 5
Show Author Affiliations
Liang Yang, China Academy of Engineering Physics (China)
Univ. of Science and Technology of China (China)
Wei Liao, China Academy of Engineering Physics (China)
Xinxiang Miao, China Academy of Engineering Physics (China)
Xiaodong Yuan, China Academy of Engineering Physics (China)
Wanguo Zheng, China Academy of Engineering Physics (China)
Haibin Lv, China Academy of Engineering Physics (China)
Guorui Zhou, China Academy of Engineering Physics (China)
Xiaotao Zu, Univ. of Electronic Science and Technology of China (China)
Xia Xiang, Univ. of Electronic Science and Technology of China (China)


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