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Effects of resonator design on the efficiency of singly-resonant optical parametric oscillator with intracavity sum-frequency generation

机译:谐振腔设计对腔内和频产生的单谐振光参量振荡器效率的影响

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摘要

We present a theoretical model to investigate the performance of an intracavity sum-frequency generation (SFG) inside the ring resonator of a singly-resonant optical parametric oscillator (SR-OPO) scheme. The effect of the resonator specifications on the efficiency of such SFG-OPO configuration is modeled and simulated by solving the coupled equations in a normalized from which describe simultaneous SFG and OPO interactions inside two individual phase-matched nonlinear crystals. Numerical simulation is carried out using real practical values associated with experimental results that are recently reported by Devi et al. (Opt Express 21:24829-24836, 2013). We found very good agreement and consistent with the used experimental data, indicating the validity of our simulation. The influence of the beam waist of interacting beams on the conversion efficiency of resultant SFG-OPO radiation is investigated through introducing a magnifying factor that relates optical and physical characteristics of the designed SFG-OPO configuration. It is found that when this factor is taken equal to 3, the maximum of normalized SFG power reaches to ~ 0.0034 for an OPO loss of ~ 10 %. This is very consistent with the measured value of ~ 0.0030, confirming that our represented model is valid. The SFG-OPO arrangement is then optimized by extracting a mathematical formula that relates the optimum magnifying factor to the gain parameters of OPO and SFG interactions.
机译:我们提出了一个理论模型来研究单谐振光学参量振荡器(SR-OPO)方案的环形谐振器内部腔内和频生成(SFG)的性能。通过求解归一化后的耦合方程来建模和仿真谐振器规格对这种SFG-OPO配置效率的影响,该方程描述了两个单独的相位匹配非线性晶体中同时发生的SFG和OPO相互作用。使用与Devi等人最近报道的实验结果相关的实际实际值进行数值模拟。 (Opt Express 21:24829-24836,2013)。我们发现很好的一致性,并且与使用的实验数据一致,表明我们的仿真是正确的。通过引入与设计的SFG-OPO配置的光学和物理特性相关的放大系数,研究了相互作用光束的束腰对合成SFG-OPO辐射的转换效率的影响。可以发现,当该因子等于3时,OPO损耗约为10%时,归一化SFG功率的最大值达到〜0.0034。这与〜0.0030的测量值非常一致,确认我们表示的模型有效。然后,通过提取数学公式来优化SFG-OPO布置,该数学公式将最佳放大系数与OPO和SFG相互作用的增益参数相关联。

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