Diode-pumped microchip Nd3+Cr4+:YAG laser and its frequency-doubling operation

Xiaobo Chen; Lin Wang; Guowen Wang; Zhiguo Zhang; Jane G. Zhu; Z. Charles Ying

doi:10.1117/12.459005

13 March 2002 Diode-pumped microchip Nd3+Cr4+:YAG laser and its frequency-doubling operation

Xiaobo Chen, Lin Wang, Guowen Wang, Zhiguo Zhang, Jane G. Zhu, Z. Charles Ying

Proceedings Volume 4630, Solid State Lasers XI; (2002) https://doi.org/10.1117/12.459005
Event: High-Power Lasers and Applications, 2002, San Jose, California, United States

Abstract

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.

Citation Download Citation

Xiaobo Chen, Lin Wang, Guowen Wang, Zhiguo Zhang, Jane G. Zhu, and 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

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KEYWORDS

Crystals

Neodymium

Chromium

YAG lasers

Nd:YAG lasers

Laser crystals

Ions

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