Diode-end-pumped CW and actively Q-switched Tm,Ho:YLF ring laser |
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| Authors: | D. X. Zhang Y. L. Ju C. T. Wu Z. G. Wang |
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| Affiliation: | 1.Xidian University,Xi’an,China;2.National Key Laboratory of Tunable Laser Technology,Harbin Institute of Technology,Harbin,China |
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| Abstract: | This paper presents CW and acoustic-optical Q-switched Tm,Ho:YLF laser performance in a laser-diode end-pumping figure-eight ring resonator structure at 77 K. Under CW operation, different transmission of output couplers and different cavity length were used to achieve best characteristics of the laser. The maximum power of 1.85 W is achieved with the threshold of 2.09 W, slope efficiency of 28.14% and optical-to-optical efficiency of 20.3% on the condition of 1 m cavity length and 18% transmission. Under pump power of 4 W, laser characteristics under Q-switched operation with different pulse repeat frequency was investigated. Maximum energy of 5.86 mJ is achieved with pulse width of 171.2 ns, peak power of 34.2 kW and dynamic-static ratio about Q-switch laser of 0.62 at pulse repeat frequency 70 Hz. |
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