High-repetition-rate tunable mid-infrared optical parametric oscillator based on MgO: periodically poled lithium niobate

Yongji Yu; Xinyu Chen; Jing Zhao; Chao Wang; Chunting Wu; Guangyong Jin

doi:10.1117/1.OE.53.6.061604

2 December 2013 High-repetition-rate tunable mid-infrared optical parametric oscillator based on MgO: periodically poled lithium niobate

Yongji Yu, Xinyu Chen, Jing Zhao, Chao Wang, Chunting Wu, Guangyong Jin

Author Affiliations +

Optical Engineering, Vol. 53, Issue 6, 061604 (December 2013). https://doi.org/10.1117/1.OE.53.6.061604

Abstract

A mid-infrared optical parametric oscillator (OPO) with an idler wavelength of 3.85 μm at a repetition rate of 200 kHz is presented, and a high-repetition-rate electro-optic (EO) Q-switched Nd∶GdVO₄ laser with a double-crystal RbTiOPO₄EO modulator is used as the pump source. The OPO is designed as an extracavity singly resonant optical parametric oscillator. The threshold value of the OPO system is only 1.3 W at 1.06 μm. When the MgO: periodically poled lithium niobate (MgO: PPLN) crystal is operated at 90°C and the pump power is 10.5 W with a repetition of 200 kHz, a maximum average output power of 1.82 W at idler wavelength of 3.85 μm and pulse width of 14.3 ns are obtained. The slope efficiency of the 3.85-μm laser with respect to the pump laser is 21.3%. The M² factors of the 3.85-μm laser are 1.84 and 1.76 in the parallel and perpendicular directions, respectively. The mid-infrared tunability of 3.7 to 3.9 μm can be achieved by adjusting the temperature of MgO∶PPLN crystal from 210 to 35°C.

Citation Download Citation

Yongji Yu, Xinyu Chen, Jing Zhao, Chao Wang, Chunting Wu, and Guangyong Jin "High-repetition-rate tunable mid-infrared optical parametric oscillator based on MgO: periodically poled lithium niobate," Optical Engineering 53(6), 061604 (2 December 2013). https://doi.org/10.1117/1.OE.53.6.061604

Published: 2 December 2013

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