Xiaobo Chen,1 Lin Wang,2 Guowen Wang,3 Zhiguo Zhang,4 Jane G. Zhu,5 Z. Charles Ying5
1Beijing Normal Univ. and New Mexico State Univ. (China) 2Bejing Normal Univ. and Institute of Physics (China) 3Peking Univ. (China) 4Institute of Physics (China) 5New Mexico State Univ. (United States)
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A diode-pumped microchip laser is developed and achieves self Q-switched operation, which produces nanosecond pulses at a wavelength of 946 nm. The laser medium is a crystal of yttrium aluminum garnet (YAG) doped with both neodymium and chromium. The two surfaces of the NdCr:YAG crystal are coated with dielectric layers, which serve as the mirrors of the laser cavity. The Nd3+ ions in the NdCr:YAG crystal function as the gain medium while the Cr4+ ions act as a saturable absorber. The presence of the saturable absorber leads to self Q-switching, which produces laser pulses of 3.7-ns duration and 946-nm wavelength at a peak power of 240 W. When the laser output is focused onto a KNbO3 crystal, nanosecond pulses of blue color at 473 nm are obtained. The blue laser output has a single frequency and TEM00 transverse mode at a peak power of approximately 18 W.
Xiaobo Chen,Lin Wang,Guowen Wang,Zhiguo Zhang,Jane G. Zhu, andZ. Charles Ying
"Diode-pumped microchip Nd3+Cr4+:YAG laser and its frequency-doubling operation", Proc. SPIE 4630, Solid State Lasers XI, (13 March 2002); https://doi.org/10.1117/12.459005
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Xiaobo Chen, Lin Wang, Guowen Wang, Zhiguo Zhang, Jane G. Zhu, Z. Charles Ying, "Diode-pumped microchip Nd3+Cr4+:YAG laser and its frequency-doubling operation," Proc. SPIE 4630, Solid State Lasers XI, (13 March 2002); https://doi.org/10.1117/12.459005