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Chin. Phys. B, 2020, Vol. 29(8): 084205    DOI: 10.1088/1674-1056/ab8ac4
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

High efficiency sub-nanosecond electro-optical Q-switched laser operating at kilohertz repetition frequency

Xin Zhao(赵鑫)1, Zheng Song(宋政)1, Yuan-Ji Li(李渊骥)1,2, Jin-Xia Feng(冯晋霞)1,2, Kuan-Shou Zhang(张宽收)1,2
1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China;
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
Abstract  Based on a theoretical model of Q-switched laser with the influences of the driving signal sent to the Pockels cell and the doping concentration of the gain medium taken into account, a method of achieving high energy sub-nanosecond Q-switched lasers is proposed and verified in experiment. When a Nd:YVO4 crystal with a doping concentration of 0.7 at.% is used as a gain medium and a driving signal with the optimal high-level voltage is applied to the Pockels cell, a stable single-transverse-mode electro-optical Q-switched laser with a pulse width of 0.77 ns and a pulse energy of 1.04 mJ operating at the pulse repetition frequency of 1 kHz is achieved. The precise tuning of the pulse width is also demonstrated.
Keywords:  milijoule level sub-nanosecond laser      kilohertz repetition frequency      doping concentration of laser crystal      tunable pulse width  
Received:  29 February 2020      Revised:  23 March 2020      Published:  05 August 2020
PACS:  42.60.By (Design of specific laser systems)  
  42.60.Gd (Q-switching)  
Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2017YFB0405203) and the Shanxi "1331 Project" Key Subjects Construction, China (Grant No. 1331KSC).
Corresponding Authors:  Yuan-Ji Li     E-mail:  liyuanji@sxu.edu.cn

Cite this article: 

Xin Zhao(赵鑫), Zheng Song(宋政), Yuan-Ji Li(李渊骥), Jin-Xia Feng(冯晋霞), Kuan-Shou Zhang(张宽收) High efficiency sub-nanosecond electro-optical Q-switched laser operating at kilohertz repetition frequency 2020 Chin. Phys. B 29 084205

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