Thermal management of water-cooled 10 Hz Yb:YAG laser amplifier

Jiang Xinying; Wang Zhenguo; Zheng Jiangang; Yan Xiongwei; Li Min; Zhang Xiongjun; Su Jingqin; Zhu Qihua; Zheng Wanguo

doi:10.11884/HPLPB202032.190456

Volume 32 Issue 1

Dec. 2019

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Article Navigation > High Power Laser and Particle Beams > 2020 > 32(1): 011010

Jiang Xinying, Wang Zhenguo, Zheng Jiangang, et al. Thermal management of water-cooled 10 Hz Yb:YAG laser amplifier[J]. High Power Laser and Particle Beams, 2020, 32: 011010. doi: 10.11884/HPLPB202032.190456

Citation:

Jiang Xinying, Wang Zhenguo, Zheng Jiangang, et al. Thermal management of water-cooled 10 Hz Yb:YAG laser amplifier[J]. High Power Laser and Particle Beams, 2020, 32: 011010. doi: 10.11884/HPLPB202032.190456

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Thermal management of water-cooled 10 Hz Yb:YAG laser amplifier

doi: 10.11884/HPLPB202032.190456

Jiang Xinying^{1, 2, 3
,},
Wang Zhenguo^{1, 2},
Zheng Jiangang^{1, 2},
Yan Xiongwei^{1, 2},
Li Min¹,
Zhang Xiongjun¹,
Su Jingqin^{1, 2
,
,},
Zhu Qihua¹,
Zheng Wanguo^{1, 2
,
,}

1.
Research Center of Laser Fusion , CAEP, Mianyang 621900, China
2.
Key Laboratory of Science and Technology on High Energy Laser, China Academy of Engineering Physics, Mianyang 621900, China
3.
Graduate School, CAEP, Beijing 100088, China

Funds: Key Laboratory of Science and Technology on High Energy Laser,China Academy of Engineering Physics (2019HEL05-2)

More Information

Author Bio:
Jiang Xinying(1979—),female, PhD candidate, associate researcher, engaged in diode pumped solid state high powe laser research; noveltymm@126.com
Corresponding author: Su Jingqin, sujingqin@caep.cn; Zheng Wanguo, wgzheng_caep@sina.com
Received Date: 2019-11-15
Rev Recd Date: 2019-12-20
Publish Date: 2019-12-26

Abstract

Abstract

To control the thermal wavefront distortion of repetition frequency laser, we′ve developed a water-cooled active-mirror laser amplifier, which was uniformly cooled from the rear of crystal disk. The numerical anslysis and experimental study on the characterstics of the amplifier’s thermal distortion were carried out. It was found that the thermal distorition devoted a significiant modulation to the near field of the laser when the average pump power density was as high as 200 W/cm² with the operation frequency of 10 Hz. Near-field modulation would bring a risk to damage the amplifier. To eliminate the modulation of thermal distortion in the near field, two approaches were taken. Firstly, the pump intensity distribution was homogenized, then the edge thermal balance control was carried out. The near field modulation from thermal wavefront distortion was eliminated by these means, a four-pass amplifier with water-cooled laser heads ran well at 10 Hz. The focal spot of output laser was smaller than 5 diffraction limits without any compensation.
- laser amplifiers,
- diode-pumped lasers,
- thermal effects,
- water-cooled active mirror

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References(13)

References

[1]	Bourdet G. Comparison of pulse amplification performances in longitudinally pumped ytterbium doped materials[J]. Opt Commun, 2001, 200: 331-342. doi: 10.1016/S0030-4018(01)01622-4
[2]	Yu Haiwu, Duan Wentao, Xu Meijian, et al. Review of ytterbium-doped laser materials[J]. Laser &Optoelectronics Progress, 2007, 44(5): 30-41.
[3]	Bayramian A, Armstrong P, Ault E, et al. The Mercury project: A high average power, gas-cooled laser for inertial fusion energy development[J]. Fus Sci Technol, 2007, 52: 383-387. doi: 10.13182/FST07-A1517
[4]	Dong Jun, Bass Michael, Mao Yanli, et al. Dependence of the Yb³⁺ emission cross section and lifetime on temperature and concentration in yttrium aluminum garnet[J]. Journal of the Optical Society of America B, 2003, 20(9): 1975-1979. doi: 10.1364/JOSAB.20.001975
[5]	Gonçalvès-Novo T, Albach D, Vincent B, et al. 14 J/2 Hz Yb³⁺: YAG diode pumped solid state laser chain[J]. Optics Express, 2013, 21(1): 855-866. doi: 10.1364/OE.21.000855
[6]	Marrazzo S, Gonçalvès-Novo T, Millet F, et al. Low temperature diode pumped active mirror Yb³⁺: YAG disk laser amplifier studies[J]. Optics Express, 2016, 24(12): 12651-12660. doi: 10.1364/OE.24.012651
[7]	Mason P, Divoký M, Butcher T, et al. Commissioning of a kW-class nanosecond pulsed DPSSL operating at 105 J, 10 Hz [C]//Proceedings of the SPIE. 2017: 102380H.
[8]	Iyama K, Tokita S, Kawashim T, et al. Development of sub-ns, 1 J Yb: YAG TRAM multipass amplifier[C]//HEC-DPSSL. 2017.
[9]	Kabeya Y, Morita T, Hatano Y, et al. Development of a 10-J, 10-Hz laser amplifier system with cryo-cooled Yb: YAG ceramics using active-mirror method [C]//Proc of SPIE. 2019: 108960M.
[10]	Han Chi, Baumgarten C M, Jankowska E, et al. Thermal behavior characterization of a kilowatt-power-level cryogenically cooled Yb: YAG active mirror laser amplifier[J]. Journal of the Optical Society of America B, 2019, 36(4): 1084-1090. doi: 10.1364/JOSAB.36.001084
[11]	Liu Tinghao, Sui Zhan, Chen Lin, et al. 12 J, 10 Hz diode-pumped Nd: YAG distributed active mirror amplifier chain with ASE suppression[J]. Optics Express, 2017, 25(18): 21981-21992. doi: 10.1364/OE.25.021981
[12]	Zheng Jiangang, Jiang Xinying, Yan Xiongwei, et al. Progress of the 10 J water-cooled Yb: YAG laser system in RCLF[J]. High Power Laser Science and Engineering, 2014, 2: e27. doi: 10.1017/hpl.2014.29
[13]	Jiang Xinying, Yan Xiongwei, Wang Zhenguo, et al. Influence of thermal reduced depolarization on a repetition-frequency laser amplifier and compensation[J]. High Power Laser Science and Engineering, 2015, 3: e9. doi: 10.1017/hpl.2015.4