Influence of Pump Light Focused Characteristics on High Repetition Frequency 1 064 nm Passively Q-switched Laser

被引：0
|
作者：
Yao C. [1 ,2 ]
Fu X. [1 ]
Shen Y. [1 ,2 ]
Li W. [1 ,2 ]
Fu X. [1 ]
机构：
[1] Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun
[2] University of Chinese Academy of Sciences, Beijing
来源：
Faguang Xuebao/Chinese Journal of Luminescence | 2023年 / 44卷 / 02期
关键词：
coupling focusing lens position; LD-pumped; passively Q-switched;
D O I：
10.37188/CJL.20220294
中图分类号：
学科分类号：
摘要：
The effect of pump focusing characteristic on output laser characteristics of passively Q-switched solid-state（PQS）laser is studied. Using a 10 W laser diode（LD）and a coupling focusing lens with focal length of 4 mm，without changing the cavity structure and the distance between LD and resonator（15 mm），five coupling focusing lens positions were selected to research the effect of pump focusing characteristic on output laser characteristics，especially on the stability of the output pulse. When the distance between LD and the coupling focusing lens is 7. 50 mm，at a continuous-wave pump power of 3. 550 W，a passively Q-switched laser with higher repetition rate（160 kHz），higher average output power（360 mW），higher single-pulse energy（2. 250 μJ）and lower time jitter（120 ns）was obtained. The experimental results indicate that the match degree between pump focusing spot and fundamental mode spot is good when the distance between LD and the coupling focusing lens is 7. 50 mm. The theoretical calculation results indicate that the ratio of the fundamental mode spot size to the focusing spot size is 0.854 when the distance between LD and the coupling focusing lens is 7. 50 mm. The ratio can be used as a reference for the research of high repetition-frequency PQS laser. © 2023 Chines Academy of Sciences. All rights reserved.
引用
收藏
页码：307 / 313
页数：6
相关论文
共 12 条
  • [1] LI M L, MENG P B, YAN F J，, Et al., Progress on passively Q-switched solid-state lasers［J］, Laser Optoelectron. Prog, 52, 9, (2015)
  • [2] LI B B., Study on Compact High Peak Power End‐pumped Solid‐state Lasers［D］, (2014)
  • [3] HALL D G, SMITH R J, RICE R R., Pump-size effects in Nd∶YAG lasers［J］, Appl. Opt, 19, 18, pp. 3041-3043, (1980)
  • [4] LAPORTA P, BRUSSARD M., Design criteria for mode size optimization in diode-pumped solid-state lasers［J］, IEEE J. Quantum Electron, 27, 10, pp. 2319-2326, (1991)
  • [5] CHEN Y F., Pump-to-mode size ratio dependence of thermal loading in diode-end-pumped solid-state lasers［J］, J. Opt. Soc. Am. B, 17, 11, pp. 1835-1840, (2000)
  • [6] DING X T., Design and Analysis on Structure Parameters of Diode Side‐pumped Thin Disk Laser［D］, (2007)
  • [7] YANG Y M, WEN J G, WANG S Y，, Et al., The thermal lens focus of the end-pumped Nd∶YAG laser［J］, Acta Photonica Sinica, 34, 12, pp. 1769-1772, (2005)
  • [8] LI G Q, ZHAO S Z, YANG K J, Et al., Control of the pulse width in a diode-pumped passively Q-switched Nd∶GdVO<sub>4</sub>/ KTP green laser with a Cr<sup>4+</sup>∶YAG saturable absorber［J］, Appl. Opt, 44, 28, pp. 5990-5995, (2005)
  • [9] YIN L., Study on Passively Q‐switched and Mode‐locked Laser Characteristics of LD‐pumped Nd∶YVO<sub>4</sub> Composite Crystal ［D］, (2012)
  • [10] WU X F., LD End‐pumped Passively Q‐switched Nd∶YAG Laser Simulation and Experimental Study［D］, (2016)
12