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Cleaning State of the Loop Case for Optical Crystal Module in Final Optics Assembly

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Abstract

In order to solve the online clean maintenance problem of the optical frequency-doubling crystal module in the final optics assembly, a crystal loop case is developed for better controlling the clean maintenance process. The study presents a detailed research on the cleanliness of the crystal loop case during the online maintenance process and the installation sequence of the crystal modules in the crystal. It first established a fluid simulation model of the crystal loop case system according to the online maintenance process and then analyzed the isolation effect of inlet velocity on the polluted air in view of the cleaning effect of the crystal loop case. Based on the simulation principle of gas–solid two-phase flow and the tracking results of the solid particle contamination, the range of air inflow is given for achieving the best cleaning status of the loop case. The optimal sequence of crystal module is explicit for its installation in the crystal loop case of frequency-doubling crystal module. The experimental setup has been built to examine the cleaning state of the crystal loop case, and the simulation result has been validated. The research on the cleanliness of crystal loop case can provide a useful reference for the ultra-clean manufacturing of line replaceable units and the closed loop control of cleaning in high-power laser facility.

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Acknowledgements

This research work was jointly supported by the State Key Program of National Natural Science Foundation of China (Grant No. 51535003) and the National Natural Science Foundation of China (Grant No. 51575138).

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Authors and Affiliations

  1. School of Mechanical and Electrical Engineering, Harbin Institute of Technology, Harbin, 150001, China

    Qingshun Bai, Yuhai Li, Kai Zhang, Canbin Wang & Feihu Zhang

  2. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, China

    Xiaodong Yuan

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  1. Qingshun Bai
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  2. Yuhai Li
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  3. Kai Zhang
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  4. Canbin Wang
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  5. Xiaodong Yuan
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  6. Feihu Zhang
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Correspondence to Qingshun Bai.

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Bai, Q., Li, Y., Zhang, K. et al. Cleaning State of the Loop Case for Optical Crystal Module in Final Optics Assembly. Nanomanuf Metrol 1, 260–267 (2018). https://doi.org/10.1007/s41871-018-0029-4

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  • DOI: https://doi.org/10.1007/s41871-018-0029-4

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