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Research on mode selection characteristics of high repetition frequency Pr:YLF laser based on pre-laser and multi-F-P combination technology

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Abstract

To obtain single-longitudinal-mode (SLM) laser output under high power injection conditions, a theoretical model of multi-mode rate equation based on pre-laser Q-switched and a Fabry–Perot (F-P) etalon group is established in this research. The simulation results show that with the combination of three F-P etalons, not only can the spectral linewidth be initially narrowed, but the transmission loss difference between adjacent longitudinal modes can also be further adjusted. Therefore, the longitudinal mode selection ability of the pre-laser Q-switch under high-power energy injection is effectively enhanced. In the experiment, dynamic modeling is used as a key parameter guide. The final stable output 639.7 nm Pr:YLF SLM laser was obtained. The upper limit of pump absorption was effectively increased by 57%, the single pulse energy was increased by 56%, and the linewidth was compressed to 14 MHz. The experimental results are in good agreement with the simulation results.

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Data availability

The datasets generated and analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

We thank the Key Laboratory of Jilin Province Solid-State Laser Technology and Application for the use of the equipment.

Funding

The authors acknowledge the support of the Changchun Science and Technology Development Plan Project (No. 21ZY34), National Natural Science Foundation of China (No. U19A2077), the Department of Science and Technology of the Jilin Province (Grant no. 20230508138RC), and the Department of Human Resources and Social Security of the Jilin Province (Grant no. 634230337004).

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Authors and Affiliations

  1. Jilin Key Laboratory of Solid-State Laser Technology and Application, School of Physics, Changchun University of Science and Technology, Changchun, 130022, People’s Republic of China

    Chang Liu, Long **, Weicheng Dai, Guangyong **, Yuan Dong & Yongji Yu

Authors
  1. Chang Liu
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  2. Long **
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  3. Weicheng Dai
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  4. Guangyong **
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  5. Yuan Dong
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  6. Yongji Yu
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Contributions

Chang Liu: Writing-Original draft preparation, Writing-Review & Editing, Methodology, Software，experiment; Long **: Validation, Conceptualization, Formal analysis; Weicheng Dai: Project analysis and support; Yuan Dong : Project administration, Supervision; Guangyong **: Resources； Yongji Yu: Investigation.

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Correspondence to Guangyong ** or Yuan Dong.

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Liu, C., **, L., Dai, W. et al. Research on mode selection characteristics of high repetition frequency Pr:YLF laser based on pre-laser and multi-F-P combination technology. Appl. Phys. B 129, 189 (2023). https://doi.org/10.1007/s00340-023-08129-1

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