,Continuous-wave mid-infrared intracavity singly resonant optical parametric oscillator based on per

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This paper reports a continuous-wave (CW) mid-infrared intracavity singly resonant optical parametric o6cillatorbased on periodically poled lithium niobate (PPLN) pumped by a diode-end-pumped CW Nd:YVOa laser.Considering the thermal lens effects,it adopted an optical ballast lens and the near-concentric cavity for better operation.At the PPLN’s grating period of 28.5 Dm and the temperature of 140°C,the maximum idler output power of 155 mW at 3.86μm has been achieved when the 808 nm pump power is 8.5 W,leading to an optical-to-optical conversion efficiency of 1.82%.
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