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High power and efficiency of a 2044-nm c-cut Tm, Ho:YAlO3 laser |
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| Authors: | L. J. Li B. Q. Yao J. P. Qin D. Y. Wu Y. M. Wang J. Wang Z. L. He W. Y. Liu J. J. Chen Y. Z. Wang Z. G. Zhang A. H. Li |
| Affiliation: | 1. Institute of Optoelectronic Technology, Heilongjiang Institute of Technology, Harbin, 150001, China 2. National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin, 150001, China 3. Department of Physics, Harbin Institute of Technology, Harbin, 15000, China |
| Abstract: | A high power and efficiency of c-cut Tm, Ho:YAlO3 (YAP) laser is reported in the paper. The laser operated in continuous wave (CW) mode or Acousto-optical (AO) Q-switched mode at 2044 nm. The Tm, Ho:YAP crystal was cooled at the temperature of 77 K and pumped by a fiber-coupled laser diode (LD) with the centre output wavelength of 794.8 nm. In CW operation, a 9.30-W output power was obtained at a 150-mm physical cavity length, corresponding to a slope efficiency of 42.5%. In Q-switch mode, the output average power of 9 W was achieved at the pulse repetition frequency (PRF) of 10 kHz with a 130-ns pulse width. Moreover, the energy per pulse of 3.54 mJ in 47 ns was acquired at 2.5 kHz with a 75.3-kW peak power. |
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