Quantitative measurement of CO<sub>2</sub>laser-induced residual stress in fused silica optics

W1844080556 · 수집 2026-10-04 18:12:17

T10732 Laser Material Processing Techniques

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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.

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PDF 본문 자동 추출 실패: [download] not a PDF (Content-Type: text/html, final URL: https://www.spiedigitallibrary.org/journals/optical-engineering/volume-54/issue-5/057105/Quantitative-measurement-of-CO2-laser-induced-residual-stress-in-fused/10.1117/1.OE.54.5.057105.pdf) (2026-10-04 20:35:49)

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