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Proceedings Paper

High power Nd:YAG ceramic lasers: passive Q-switching and frequency doubling
Author(s): Ruijun Lan; Robert Fedosejevs; Hong Liu; Zhengping Wang; Yaohui Lv; Yuanhua Sang; Haohai Yu; Jiyang Wang
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Paper Abstract

A high power passive Q-switched laser and a continuous-wave (CW) green laser both with a neodymium-doped yttrium aluminum garnet (Nd:YAG) ceramic as the laser material have been demonstrated. Two Cr4+:YAG crystals with 73.9% and 79.6% initial transmission at 1064 nm have been used as saturable absorbers. In Q-switched regime the laser generated up to 209 μJ, 4.5 ns pulses, which corresponds to a peak power of 46.8 kW. In CW regime at 1064 nm the laser generated 11.3 W of output power at a pump power of 21.6 W, corresponding to an optical-optical conversion efficiency of 52.3%. By using a type-II cut KTP crystal, the CW frequency-doubled operation of Nd:YAG ceramic was achieved. The maximum output power of 1.86 W at 532 nm has been obtained. The one-dimensional intensity distribution of the green beam cross-section was observed to be Gaussian. When the output power was 1 W, the M2 factor was measured to be 1.7.

Paper Details

Date Published: 4 August 2009
PDF: 8 pages
Proc. SPIE 7386, Photonics North 2009, 738634 (4 August 2009); doi: 10.1117/12.839626
Show Author Affiliations
Ruijun Lan, Shandong Univ. (China)
Univ. of Alberta (Canada)
Robert Fedosejevs, Univ. of Alberta (Canada)
Hong Liu, Shandong Univ. (China)
Zhengping Wang, Shandong Univ. (China)
Yaohui Lv, Shandong Univ. (China)
Yuanhua Sang, Shandong Univ. (China)
Haohai Yu, Shandong Univ. (China)
Jiyang Wang, Shandong Univ. (China)

Published in SPIE Proceedings Vol. 7386:
Photonics North 2009
Réal Vallée, Editor(s)

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