Sui Shao-Shuai, Tang Ming-Ying, Yang Yue-De, Xiao Jin-Long, Du Yun, Huang Yong-Zhen
Opt Lett. 2015 Nov 1;40(21):4995-8. doi: 10.1364/OL.40.004995.
A hybrid spiral-ring laser vertically coupled to a silicon waveguide is demonstrated to achieve stable and unidirectional output theoretically and experimentally. The mode competition between clockwise (CW) and counter-clockwise (CCW) modes is eliminated due to the mode coupling in a spiral resonator. The simulation results indicate that the CCW and CW direction traveling waves are dominant components, respectively, for the spiral resonator without and with an output waveguide. A hybrid AlGaInAs/Si spiral-ring laser is designed and fabricated vertically coupled to a silicon waveguide. For a spiral-ring laser with a radius of 30 μm and a ring width of 5 μm, the continuous-wave lasing threshold of 9.5 mA is obtained with the threshold current density of 1.1 kA/cm(2) at a temperature of 285 K. The output power fluctuations due to the mode competition between CW and CCW modes are eliminated. The output power from CCW direction is five times that from CW direction.
一种垂直耦合到硅波导的混合螺旋环形激光器在理论和实验上都被证明能实现稳定且单向的输出。由于螺旋谐振器中的模式耦合，顺时针（CW）和逆时针（CCW）模式之间的模式竞争被消除。仿真结果表明，对于没有输出波导和有输出波导的螺旋谐振器，逆时针和顺时针方向传播的波分别是主要成分。设计并制作了一种垂直耦合到硅波导的混合AlGaInAs/Si螺旋环形激光器。对于半径为30μm、环宽为5μm的螺旋环形激光器，在285K的温度下，获得了9.5mA的连续波激射阈值，阈值电流密度为1.1kA/cm²。由于CW和CCW模式之间的模式竞争导致的输出功率波动被消除。来自CCW方向的输出功率是来自CW方向的五倍。
