Laser-diodeend-pumped electro-optic Q-switched Tm:SrF<sub>2</sub> laser

Wu Guang; Zhang Zhen; Wang Tao; Ji Lailin; Cui Yong; Gao Yanqi; Sui Zhan

doi:10.11884/HPLPB202436.230140

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Wu Guang, Zhang Zhen, Wang Tao, et al. Laser-diodeend-pumped electro-optic Q-switched Tm:SrF2 laser[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202436.230140

Citation:

Wu Guang, Zhang Zhen, Wang Tao, et al. Laser-diodeend-pumped electro-optic Q-switched Tm:SrF₂ laser[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202436.230140

Wu Guang, Zhang Zhen, Wang Tao, et al. Laser-diodeend-pumped electro-optic Q-switched Tm:SrF2 laser[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202436.230140

Citation:

Wu Guang, Zhang Zhen, Wang Tao, et al. Laser-diodeend-pumped electro-optic Q-switched Tm:SrF₂ laser[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202436.230140

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Laser-diodeend-pumped electro-optic Q-switched Tm:SrF₂ laser

doi: 10.11884/HPLPB202436.230140

Wu Guang^1
,,
Zhang Zhen²,
Wang Tao¹,
Ji Lailin^{1
,
,},
Cui Yong¹,
Gao Yanqi^{1
,
,},
Sui Zhan¹

1.
Shanghai Institute of Laser Plasma, CAEP, Shanghai 201800, China
2.
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China

Received Date: 2023-05-19
Accepted Date: 2024-01-04
Rev Recd Date: 2024-01-04

Available Online: 2024-01-29

Abstract

Abstract

The Tm³⁺ gain medium with high doping concentration can improve the quantum efficiency of the laser through the cross relaxation process, but it also increases the energy loss caused by energy up-conversion and limits the improvement of laser efficiency. The fluorescence characteristics and laser performance of Tm:SrF₂ crystal are studied. Under laser-diode (LD) end-pumping, a continuous-wave laser with a maximum output power of 2.99 W and a slope efficiency of up to 82.1% is realized. The pump threshold of the laser is 0.81 W, and the center wavelength is 1851 nm. Electro-optic Q-switching of the Tm:SrF₂ laser is demonstrated. At the repetition rate of 500 Hz, a maximum pulse energy of 1.02 mJ and a minimum pulse width of 45 ns are achieved, resulting in a peak power of 22.67 kW. The experimental results indicate that the Tm:SrF₂ laser based on LD pumping has very high efficiency and is expected to be an ideal pump source for optical parametric oscillators (OPOs) and optical parametric amplifiers (OPAs).
- laser technology,
- Tm:SrF₂ laser,
- electro-optical Q-switching,
- LD end-pump,
- slope efficiency

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References(22)

References

[1]	Fried N M. Recent advances in infrared laser lithotripsy [Invited][J]. Biomedical Optics Express, 2018, 9(9): 4552-4568. doi: 10.1364/BOE.9.004552
[2]	Henderson S W, Suni P J M, Hale C P, et al. Coherent laser radar at 2 μm using solid-state lasers[J]. IEEE Transactions on Geoscience and Remote Sensing, 1993, 31(1): 4-15. doi: 10.1109/36.210439
[3]	Targ R, Steakley B C, Hawley J G, et al. Coherent lidar airborne wind sensor II: flight-test results at 2 and 10 μm[J]. Applied Optics, 1996, 35(36): 7117-7127. doi: 10.1364/AO.35.007117
[4]	Leindecker N, Marandi A, Byer R L, et al. Octave-spanning ultrafast OPO with 2.6-6.1µm instantaneous bandwidth pumped by femtosecond Tm-fiber laser[J]. Optics Express, 2012, 20(7): 7046-7053. doi: 10.1364/OE.20.007046
[5]	Lippert E, Fonnum H, Arisholm G, et al. A 22-watt mid-infrared optical parametric oscillator with V-shaped 3-mirror ring resonator[J]. Optics Express, 2010, 18(25): 26475-26483. doi: 10.1364/OE.18.026475
[6]	Jin Lin, Liu Pian, Huang Haitao, et al. High average power of Q-switched Tm: YAG slab laser[J]. Optics Communications, 2016, 372: 241-244. doi: 10.1016/j.optcom.2016.04.026
[7]	Kwiatkowski J. Power and spectral analyses in diode-pumped c-cut Pbnm Tm: YAP laser[J]. Chinese Optics Letters, 2020, 18: 091401. doi: 10.3788/COL202018.091401
[8]	Na Quanxin, Xu Changwen, Huang Zhiyang, et al. High-power and high-efficiency short wavelength operation of a Tm: YLF laser at 1.83 μm[J]. Optics Letters, 2019, 44(17): 4403-4406. doi: 10.1364/OL.44.004403
[9]	Li Shutao, Niu C, Wen Y, et al. Laser characteristics of LD end-pumped CW and Q-switched Tm: LuYAG laser[J]. Infrared Physics & Technology, 2020, 111: 103559.
[10]	Sottile A, Damiano E, Rabe M, et al. Widely tunable, efficient 2 µm laser in monocrystalline Tm³⁺: SrF₂[J]. Optics Express, 2018, 26(5): 5368-5380. doi: 10.1364/OE.26.005368
[11]	Berthomé Q, Grisard A, Faure B, et al. Actively Q-switched tunable single-longitudinal-mode 2 µm Tm: YAP laser using a transversally chirped volume Bragg grating[J]. Optics Express, 2020, 28(4): 5013-5021. doi: 10.1364/OE.384499
[12]	Liu Jian, Dong Jifei, Wang Yinyin, et al. Tm: YAG single-crystal fiber laser[J]. Optics Letters, 2021, 46(18): 4454-4457. doi: 10.1364/OL.434618
[13]	Shaw L B, Chang R S F, Djeu N. Measurement of up-conversion energy-transfer probabilities in Ho: Y₃A1₅O₁₂ and Tm: Y₃A1₅O₁₂[J]. Physical Review B, 1994, 50(10): 6609-6619. doi: 10.1103/PhysRevB.50.6609
[14]	Zhang Zhen, Guo Xinsheng, Wang Jingya, et al. High-efficiency 2 μm continuous-wave laser in laser diode-pumped Tm³⁺, La³⁺: CaF₂ single crystal[J]. Optics Letters, 2018, 43(17): 4300-4303. doi: 10.1364/OL.43.004300
[15]	Ma Fengkai, Su Fang, Zhou Rongfu, et al. The defect aggregation of RE³⁺ (RE = Y, La ~ Lu) in MF₂ (M = Ca, Sr, Ba) fluorites[J]. Materials Research Bulletin, 2020, 125: 110788. doi: 10.1016/j.materresbull.2020.110788
[16]	Doualan J L, Camy P, Moncorgé R, et al. Latest developments of bulk crystals and thin films of rare-earth doped CaF₂ for laser applications[J]. Journal of Fluorine Chemistry, 2007, 128(4): 459-464. doi: 10.1016/j.jfluchem.2006.12.017
[17]	Liu Jingjing, Zhang Cheng, Zhang Zhen, et al. 1886-nm mode-locked and wavelength tunable Tm-doped CaF₂ lasers[J]. Optics Letters, 2019, 44(1): 134-137. doi: 10.1364/OL.44.000134
[18]	Wang Yangxiao, Liu Wenxin, Zhang Zhonghan, et al. Laser-diode-pumped Tm: SrF₂ single crystal for high efficiency CW laser operation at ~2 µm[J]. Optics Letters, 2022, 47(5): 1117-1120. doi: 10.1364/OL.449484
[19]	Liu Wenxin, Zu Yuqian, Wang Yangxiao, et al. Active Q-switching operation of a Tm: SrF₂ single crystal fiber laser near 2 µm[J]. Optical Materials Express, 2021, 11(9): 2877-2882. doi: 10.1364/OME.436045
[20]	Ma Weiwei, Qian Xiaobo, Wang Jingya, et al. Highly efficient dual-wavelength mid-infrared CW Laser in diode end-pumped Er: SrF₂ single crystals[J]. Scientific Reports, 2016, 6: 36635. doi: 10.1038/srep36635
[21]	Camy P, Doualan J L, Renard S, et al. Tm ³⁺: CaF₂ for 1.9 μm laser operation[J]. Optics Communications, 2004, 236(4/6): 395-402.
[22]	Degnan J J. Theory of the optimally coupled Q-switched laser[J]. IEEE Journal of Quantum Electronics, 1989, 25(2): 214-220. doi: 10.1109/3.16265