论文标题
具有二阶非线性和三阶非线性的光学谐振器中光频兼轰炸的频域模型
Frequency-domain model of optical frequency-comb generation in optical resonators with second- and third-order nonlinearities
论文作者
论文摘要
我们开发了一个频域模型，该模型描述了具有二阶非线性和三阶非线性的光谐振器中的光频率轰炸。与时域模型相比，我们的模型原则上可以准确地表达腔分散体，从而避免了分散体超出一定顺序的截断。此外，频域模型可以很容易地包括系统参数的频率依赖性，例如线性吸收和腔耦合比。为了证明我们的模型的有效性，我们在单一共振的第二谐波一代腔中进行了数值模拟的二次梳子，并在微谐波中以两个示例中的Kerr梳子进行了模拟。从频域模型获得的模拟结果与先前时间域模型给出的结果非常吻合。包含二阶和三阶非线性的系统会引起许多新型的物理动力学。开发的频域模型将有助于理解各种光学谐振器中多阶非线过程辅助的光学频率轰炸产生。
We developed a frequency-domain model describing optical frequency-comb generation in optical resonators with second- and third-order nonlinearities. Compared with time-domain models, our model in principle allows one to express the cavity dispersion accurately, avoiding the dispersion being truncated beyond a certain order. Moreover, the frequency-domain model can readily include frequency dependence of system parameters, such as the linear absorption and the cavity coupling ratio. To demonstrate the validity of our model, we numerically simulated quadratic combs in a singly resonant second-harmonic generation cavity and Kerr combs in a micro-resonator as two examples. The simulated results obtained from the frequency-domain model agree well with those given by previous time-domain models. A system containing both second- and third-order nonlinearities can give rise to many novel physical dynamics. The developed frequency-domain model will contribute to understanding optical frequency-comb generation assisted by multi-order nonlinear processes in various optical resonators.
