High-repetition-rate narrow pulse width mid-infrared optical parametric oscillator based on PPMgLN crystal. (23rd December 2015)

• Record Type: Journal Article
• Authors: Wang, Zi-Jian; Yu, Yong-Ji; Zhai, Rui-Zhi; Chen, Xin-Yu; Wu, Chun-Ting; Jin, Guang-Yong
• Is Part Of: Laser physics. Volume 26:Number 2(2016:Feb.)
• Publication Date: 2015-12-23
• Subjects: mid-infrared laser -- high repetition -- narrow pulse width; Lasers -- Periodicals; 621.36605
• DOI: 10.1088/1054-660X/26/2/025401
• Languages: English
• ISSNs: 1054-660X

Abstract

Abstract: This paper reports a narrow pulse width optical parametric oscillator (OPO) based on periodically poled MgO:LiNbO3 (PPMgLN). When the maximum pumping power of the 1064 nm laser was 26.07 W, the acousto-optical (AO) Q-switch repetition rate was 70 kHz and the PPMgLN crystal grating period was 29 μ m; a 3840 nm mid-infrared light output power of 4.86 W was obtained at 150 °C, corresponding to a pulse width of 9.56 ns. The optical–optical conversion efficiency was about 18.6%. In addition, by changing the temperature between 25 °C to 200 °C, a tunable mid-infrared wavelength of 3765–3974 nm output laser was achieved.