氟化镁楔形微腔色散调控及孤子产生数值分析

Dispersion Engineering of Magnesium Fluoride Wedge Resonator and Numerical Analysis for Soliton Generation

用有限元计算方法仿真了MgF2楔形腔中的色散情况,并研究半径、楔角大小、楔角位置三个参数对整个腔在通讯波段的色散影响。通过从蓝失谐到红失谐的调谐过程,利用得到的色散曲线,根据Lugiato-Lefever方程和热偏移公式仿真孤子的频域和时域图。并且研究了扫描速度、品质因子、泵浦功率等对孤子产生的影响。在结合以往实验和理论基础的情况下,探讨了利用MgF2晶体腔产生孤子的一些重要参数。数据结果对制备低反常色散MgF2楔形腔及在此腔中产生孤子梳具有指导意义。

In this letter, the dispersion of the MgF2 wedge cavity is simulated using the finite element method and the dispersion effect of radius, wedge angle value, and wedge angle position on the full cavity in the communication band is studied. Further, the dispersion curve is used to simulate the frequency and time domains of solitons using the Lugiato-Lefever and thermal migration equations by employing the blue to red detuning process. The impacts of scanning speed, quality factor, and pump power on solitons are evaluated. Combined with previous experiments and assumptions, some important parameters of the MgF2 wedge cavity for the soliton generation are discussed. The data results are useful for fabricating the MgF2 wedge cavity with low anomalous dispersion and generating soliton combs in this cavity.