Photonics, Vol. 12, Pages 669: Visible Triple-Wavelength Switchable Emission Generated in Passively Q-Switched Nd:YVO4 Self-Raman Laser

Photonics doi: 10.3390/photonics12070669

Authors:
Songtao Li
Shengxi Zheng
Bowen Zheng
Yong Wei
Yongchang Zhang
Yanmin Duan
Haiyong Zhu

We report a passively Q-switched self-Raman laser using a dual-end composite c-cut Nd:YVO4 crystal, which generates switchable visible emissions at 533 nm, 560 nm, and 589 nm. A Cr4+:YAG/YAG composite crystal served the role of a saturable absorber to achieve passive Q-switching. An angle-tuned BBO crystal was used to achieve the frequency mixing between the first-tokes wave and the fundamental wave. At an incident pump power of 9.5 W, the maximum average output powers were 425 mW for the 589 nm yellow laser, 193 mW for the 560 nm lime laser, and 605 mW for the 533 nm green laser, with corresponding pulse widths of approximately 3.8, 3.6, and 35.1 ns, respectively. This result shows that a passive Q-switching operation with self-Raman crystals presents a promising approach for compact multi-wavelength pulse laser sources.

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Songtao Li www.mdpi.com