Dual-wavelength mid-infrared CW and Q-switched laser in diode end-pumped Tm,Ho:GdYTaO4 crystal

Dual-wavelength continuous-wave and Q-switched lasers are demonstrated in a Tm,Ho:GdYTaO4 crystal under 790 nm laser diode end pumping for the first time to the best of our knowledge. The laser operates with a dual wavelength at 1949.677 nm and 2070 nm for continuous-wave with a spacing of about 120...

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Bibliographic Details
Published in:Laser physics letters 2018-02, Vol.15 (2)
Main Authors: Wang, Beibei, Gao, Congcong, Dou, Renqin, Nie, Hongkun, Sun, Guihua, Liu, Wenpeng, Yu, Haijuan, Wang, Guoju, Zhang, Qingli, Lin, Xuechun, He, Jingliang, Wang, Wenjun, Zhang, Bingyuan
Format: Article
Language:English
Subjects:
dual-wavelength
mid-infrared
passively Q-switched
Tm,Ho:GdYTaO
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Summary:Dual-wavelength continuous-wave and Q-switched lasers are demonstrated in a Tm,Ho:GdYTaO4 crystal under 790 nm laser diode end pumping for the first time to the best of our knowledge. The laser operates with a dual wavelength at 1949.677 nm and 2070 nm for continuous-wave with a spacing of about 120 nm. The maximum output power is 0.332 W with a pump power of 3 W. By using graphene as the saturable absorber, a passively Q-switched operation is performed with a dual-wavelength at 1950.323 nm and 2068.064 nm with a wavelength interval of about 118 nm. The maximum average output power of the Q-switched laser goes up to 200 mW with a minimum pulse duration of 1.2 µs and a maximum repetition rate of 34.72 kHz.
ISSN:1612-2011
1612-202X
DOI:10.1088/1612-202X/aa9aad