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Proceedings Paper

Control of the pulse duration in a diode-pumped doubly passively Qswitched Nd:YVO4 laser with Cr4+:YAG and GaAs saturable absorbers
Author(s): Haikun Zhang; Yuan Yuan; Zhong Zhang; Xiupeng Zheng; Shengzhi Zhao; Kejian Yang
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Paper Abstract

Using both Cr4+:YAG and GaAs saturable absorbers in the same cavity, a diode-pumped doubly passively Q-switched Nd:YVO4 laser is realized. Compared with the solely passively Q-switched laser Cr4+:YAG or GaAs, the pulse shape of doubly Q-switched laser is more symmetric and the pulse duration is compressed. The technique to control the pulse duration has been studied. With different position of the saturable absorber, the pulse duration changes in the range from 41.8ns to 118ns at the pump power of 4.47W, respectively. A rate equation model is introduced to theoretically analyze the results obtained in the experiment, in which the Gaussian spatial distribution of the intracavity photon density and the longitudinal variation of the photon density are taken into account. The numerical calculations of the rate equations are consistent with the experimental results.

Paper Details

Date Published: 18 February 2009
PDF: 8 pages
Proc. SPIE 7276, Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications, 72761H (18 February 2009); doi: 10.1117/12.823339
Show Author Affiliations
Haikun Zhang, Univ. of Jinan (China)
Yuan Yuan, Shandong Jiaotong Univ. (China)
Zhong Zhang, Univ. of Jinan (China)
Xiupeng Zheng, Univ. of Jinan (China)
Shengzhi Zhao, Shandong Univ. (China)
Kejian Yang, Shandong Univ. (China)

Published in SPIE Proceedings Vol. 7276:
Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications
Peixiang Lu; Katsumi Midorikawa; Bernd Wilhelmi, Editor(s)

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