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  • Received: Jul. 30, 2019

    Accepted: Nov. 14, 2019

    Posted: Dec. 24, 2019

    Published Online: Dec. 30, 2019

    The Author Email: Xiaodong Fang (xdfang@aiofm.ac.cn), Xi Wang (eastangus@126.com)

    DOI: 10.3788/COL202018.021403

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    Jingzhen Shao, Xu Liang, Libing You, Ning Pan, Ying Lin, Shimao Wang, Zanhong Deng, Xiaodong Fang, Xi Wang. Laser-induced damage and periodic stripe structures of a CaF2 single crystal by an ArF excimer laser[J]. Chinese Optics Letters, 2020, 18(2): 021403

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Experimental setup for laser-induced damage test.

Fig. 1. Experimental setup for laser-induced damage test.

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Exposed sites of CaF2 samples and the corresponding laser fluence.

Fig. 2. Exposed sites of CaF2 samples and the corresponding laser fluence.

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Damage probability plot, damage threshold 2.37 J/cm2.

Fig. 3. Damage probability plot, damage threshold 2.37J/cm2.

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Optical micrograph of the damage site for different laser fluence.

Fig. 4. Optical micrograph of the damage site for different laser fluence.

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(a), (b) Optical damage micrograph for the laser fluence of 5.10 J/cm2. (c) Analysis of Newton’s rings for the four fragments [a, b, c, d in (a)]. (d) The origin of the ring pattern.

Fig. 5. (a), (b) Optical damage micrograph for the laser fluence of 5.10J/cm2. (c) Analysis of Newton’s rings for the four fragments [a, b, c, d in (a)]. (d) The origin of the ring pattern.

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SEM image of the laser-irradiated CaF2 under different laser fluence at (a) 7.34 J/cm2, (b) 6.60 J/cm2, (c) 5.75 J/cm2, and (d) 4.53 J/cm2.

Fig. 6. SEM image of the laser-irradiated CaF2 under different laser fluence at (a) 7.34J/cm2, (b) 6.60J/cm2, (c) 5.75J/cm2, and (d) 4.53J/cm2.

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SEM image of the laser-irradiated CaF2 under 7.34 J/cm2.

Fig. 7. SEM image of the laser-irradiated CaF2 under 7.34J/cm2.

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