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Threshold decrease in intracavity optical parametric oscillator synchronously pumped by mode-locked laser

机译:锁模激光器同步泵浦腔内光参量振荡器的阈值降低

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摘要

An intracavity optical parametric oscillator (IOPO) pumped by a continuous-wave (CW) mode-locked laser is experimentally realized. The fundamental cavity and optical parametric oscillator cavity are designed to satisfy synchronous pumping. The output characteristics of signal and idle light are measured. Because of higher fundamental photon intensity in IOPO, the threshold of IOPO is lower than that of an extra-cavity optical parametric oscillator. The spectroscopy of signal light is obtained and the wavelength of idle light can be estimated to be 3.298 μm from noncritical phase matching. Based on the intensity fluctuation mechanism of fundamental locking, the dynamical model for IOPO pumped by a CW mode-locked laser is developed. The simulated results for the temporal shape of three lights are calculated from the derived rate equations. Because of dispersion, the signal pulse width of the theory is smaller than that of the experiment with the same pump energy.
机译:实验上实现了由连续波(CW)锁模激光器泵浦的腔内光参量振荡器(IOPO)。基本腔和光学参数振荡器腔的设计满足同步泵浦的要求。测量信号和空闲光的输出特性。由于IOPO中的基本光子强度较高,因此IOPO的阈值低于超腔光学参量振荡器的阈值。获得了信号光的光谱,并且根据非临界相位匹配可以将闲置光的波长估计为3.298μm。基于基本锁定的强度波动机制,建立了CW锁模激光器泵浦IOPO的动力学模型。根据导出的速率方程计算三盏灯的时间形状的模拟结果。由于存在色散,因此理论上的信号脉冲宽度小于在相同泵浦能量下的实验信号宽度。

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