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Proceedings Paper

Laser-diode-pumped Cr:YAG passively Q-switched green laser by intracavity frequency doubling with periodically poled LiNbO3
Author(s): Shaojun Zhang; Xiangang Xu; Chunming Dong; Qingpu Wang; Xingyu Zhang; Ping Li; Fujun Zhang; Shengzhi Zhao
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Paper Abstract

A continue-wave (CW) laser-diode (LD) pumped passively Q-switched intracavity frequency-doubling green laser is reported in this paper. We used 3%at. Nd doped YVO4 with size of 3 X 3 X 1mm as gain medium, Cr4+:YAG as a saturable absorber with small-signal transmission T0=94% for passively Q-switch and periodically poled LiNbO3 (PPLN) with the grating period ? =6. 1 µm as a frequency doubler. The laser cavity was consisted of one face of the Nd:YVO4, coated high-reflectance (HR) coating at 1.06 µm and high transmittance (HT) at 0.808 µ m, and a 50mm radius of curvature output mirror with HR coating at 1.06 1 µm and HT coating at 0.53 µm.. A CW 1W LD and a grading-refractive-index lens were used for the end-pumping. The output energy of the green laser is 0.96 µ J with the pulse-width of 19ns. No green-noise problem exists in the green laser, because both the polarizations of fundamental wave and second harmonic wave are the same. Some theoretical results on the passively Q-switching and intracavity frequency-doubling are also reported.

Paper Details

Date Published: 5 September 2002
PDF: 4 pages
Proc. SPIE 4914, High-Power Lasers and Applications II, (5 September 2002); doi: 10.1117/12.481761
Show Author Affiliations
Shaojun Zhang, Shandong Univ. (China)
Xiangang Xu, Shandong Univ. (China)
Chunming Dong, Shandong Univ. (China)
Qingpu Wang, Shandong Univ. (China)
Xingyu Zhang, Shandong Univ. (China)
Ping Li, Shandong Univ. (China)
Fujun Zhang, Shandong Univ. (China)
Shengzhi Zhao, Shandong Univ. (China)

Published in SPIE Proceedings Vol. 4914:
High-Power Lasers and Applications II
Dianyuan Fan; Keith A. Truesdell; Koji Yasui, Editor(s)

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