有源微型环腔谐振器的数值仿真

Numerical Simulation on Active Micro-Ring Resonator

结合载流子速率方程以及时域有限差分(FDTD)法,通过将增益因子等效引入电导率,成功实现了有源微型环腔谐振器的数值仿真,并模拟了有源微环的传输特性。仿真结果表明,有源微环存在谐振波长漂移的现象。由于增益的作用,有源微环的谐振光场建立时间比无源微环要短,直通端口消光更快,表明有源微环比无源微环具有更高的开关速度。

Active micro-ring resonator is theoretically investigated and numerically simulated based on FDTD （Finite-Difference Time-Domain） solutions of the full-wave Maxwell＇s equations and carrier rate-equations. Transmission spectrum characteristics and the resonating characteristics of the active micro-ring are simulated. The results show that resonance wavelength shifting exists in active micro-ring resonator. The resonance build-up time of the active micro-ring is much shorter than that of the passive micro-ring and the extinction of light in the throughput port is much faster. It indicates that active micro-ring has faster on-off shift time than passive micro-ring.