Chinese Optics Letters, 2007, 5 (s1): 42, Published Online: Jul. 15, 2007  

LD end-pumped 1.5-W passively CW mode-locked Nd:YVO4 laser Download: 790次

Jianfeng Cui 1,2,3,*Zhongwei Fan 1,2,3Yan Xue 1,3,4Jing Zhang 1,3,4Gang Niu 3Zhaohui Shi 3Bo Pei 1,2,3Yong Bi 1,2,3Yan Qi 1,2,3
Author Affiliations
1 Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130022
2 Graduate School of the Chinese Academy of Sciences, Beijing 100039
3 Beijing GK Laser Technology Co., Ltd., Beijing 100085
4 Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 100085
Abstract
In order to get stable continuous wave (CW) mode-locked (ML) laser, conventionally, the laser cavity was designed to reach very small mode radius in the laser crystal to make the laser material saturated. While for the laser diode (LD) end pumped Nd:YVO4 without fiber coupling transmission, as long as choosing the appropriate short focus lens and making the focus area in front of the Nd:YVO4 small enough, we found even large cavity mode volume can make the laser material saturated. In addition, relatively large cavity mode volume can make high power output with single mode come true. Ideal beam quality without high order transverse mode oscillating, the CW ML state turned to be very stable. Accordingly, relatively large mode volume in the laser crystal was designed with semiconductor saturated absorber mirror (SESAM), over 1.5-W CW ML output with near diffraction limited was acquired. The optical-to-optical conversion efficiency reached 30%.

Jianfeng Cui, Zhongwei Fan, Yan Xue, Jing Zhang, Gang Niu, Zhaohui Shi, Bo Pei, Yong Bi, Yan Qi. LD end-pumped 1.5-W passively CW mode-locked Nd:YVO4 laser[J]. Chinese Optics Letters, 2007, 5(s1): 42.

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