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A new rate equation model of continuous wave Tm:YAP laser

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Abstract

Novel theoretical model based on rate equations considering re-absorption is set up to deal with the output characteristics of continuous wave (CW) Tm: YAP laser for the first time. Compared with the model that ignore the reabsorption of thulium ion at all (Model 1) or only takes it as a fixed loss (Model 2), the simulation results of the new model (Model 3) can reflect the entire process of reabsorption more accurately and obtain numerical simulation results that are closer to experimental results. Laser characteristics of LD end-pumped CW Tm: YAP crystal is achieved experimentally, which can demonstrate the accuracy of the model. Output power of 7.1 W at 1936 nm is obtained with resonator length of 78 mm under the incident pump power of 27.13 W. While the simulation results on output power of Tm: YAP laser under incident pump power of 27.13 W and cavity length of 78 mm are 17.2 W, 2.76 W, 7.36 W for Model 1, 2, 3. The finding indicates that the new model can evaluate the output performance of Tm: YAP lasers in precise.

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Data availability

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

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Acknowledgements

This work was supported by Science and Technology Department of Jilin Province in China (Grant No. 20220402021GH).

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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, China

    Yancheng Xia, Chao Niu, Kuan Li, Shiwei Xue, Yao Ma & Chunting Wu

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  1. Yancheng Xia
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  2. Chao Niu
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  3. Kuan Li
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  4. Shiwei Xue
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  5. Yao Ma
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  6. Chunting Wu
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Contributions

YX: completed the most of the article, including theoretical derivation, computer simulation, figure preparation, and some of the experiments. CN: helped with the experiments and process the experimental data. KL: prepared Fig. 1 and Fig. 4, and provided idea about experiments. SX: help wrote the main manuscript. CW and YM: as the mentors and corresponding authors, checked and revised the whole work.

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Correspondence to Yao Ma or Chunting Wu.

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Xia, Y., Niu, C., Li, K. et al. A new rate equation model of continuous wave Tm:YAP laser. Appl. Phys. B 130, 19 (2024). https://doi.org/10.1007/s00340-023-08154-0

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