Abstract
For fiber-coupled green laser-diode pump beam, a simple model was proposed to calculate the average outputs. Then we presented a direct-pumping continuous-wave Ti:Sapphire laser producing an optimized output of 3.8-W with green diodes. It was the highest output of this kind reported so far corresponding to an optical/optical conversion efficiency of 11.5% and a high slope efficiency of 15.7% at 810 nm. A highest power of 1.41-W was also obtained with the single-sided pumping corresponding to a good slope efficiency of 14.3%. High-power green diodes realized the lowest threshold pumping intensity of ~ 16.7 × 103 W/cm2 under hundred-μm-level beam diameter size. This work would benefit the design for the direct-pumping Ti:Sapphire laser as a guide.
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Acknowledgements
The authors thank Professor Jing-Yuan Zhang for his assistance in writing up of English version of this paper. This work has been supported by National Key R&D Program of China (2017YFB0405100, 2017YFB0405200). And the National Natural Science Foundation of China (61675192, 61605195, 61308032, 61622507). Key Deployment Program of Chinese Academy of Sciences (KGZD-SW-T01-2). Chinese Academy of Sciences Scientific Equipment Research Project (Grant No. YJKYYQ20170003).
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Miao, ZW., Yu, HJ., Zou, SZ. et al. Low-threshold-intensity 3.8-W continuous-wave Ti:Sapphire oscillator directly pumped with green diodes. Appl. Phys. B 127, 105 (2021). https://doi.org/10.1007/s00340-021-07652-3
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DOI: https://doi.org/10.1007/s00340-021-07652-3