Performance evaluation of ZnGeP2 optical parametric oscillator pumped by a Q-switched Tm,Ho:GdVO4 laser

Yao, Baoquan; Ju, Youlun; Wang, Yuezhu; He, Wanjun

doi:10.3788/col20080601.0068

Cited by 3 publications

(1 citation statement)

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“…The biggest challenge for a high-power and high-efficiency ZGP-OPO is how to develop a high-power/energy 2 μm pump source with good beam quality [9][10][11] . To date, there are mainly three ways to produce 2 μm lasers: OPO laser sources [7,12,13] , thulium (Tm)-doped crystalline and fiber lasers [14][15][16] , and holmium (Ho)-doped crystalline lasers [10,11,[17][18][19][20][21] .…”

Section: Introductionmentioning

confidence: 99%

High-power and high-efficiency 4.3 µm ZGP-OPO

Wang

Sun

et al. 2022

中国光学快报

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In this paper, a high-power and high-efficiency 4.3 μm mid-infrared (MIR) optical parametric oscillator (OPO) based on ZnGeP 2 (ZGP) crystal is demonstrated. An acousto-optically Q-switched Ho∶Y 3 Al 5 O 12 laser operating at 2.1 μm with a maximum average output power of 35 W and pulse width of 38 ns at a repetition rate of 15 kHz is established and employed as the pump source. A doubly resonant OPO is designed and realized with the total MIR output power of 13.27 W, including the signal and idler output power of 2.65 W at 4.07 μm and 10.62 W at 4.3 μm. The corresponding total optical-to-optical and slope efficiencies are 37.9% and 67.1%, respectively. The shortest pulse width, beam quality factor, and output power instability are measured to be 36 ns, M 2 x = 1.8, M 2 y = 2.0, and RMS < 1.9% at 8 h, respectively. Our results pave a way for designing high-power and high-efficiency 4-5 μm MIR laser sources.

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