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

页码：307 / 313

页数：6

共 12 条

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