Theoretical Analysis on Operation Speed of the Circular Defect in 2D Photonic Crystal (CirD) Laser
Theoretical Analysis on Operation Speed of the Circular Defect in 2D Photonic Crystal (CirD) Laser
复制标题
二维光子晶体(CirD)激光器圆形缺陷运行速度的理论分析
DOI：
10.1002/pssa.202000411
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Kondow Masahiko
中科院分区：
文献类型：
--
作者：
Ye Hanqiao;Nishimura Tomoya;Xiong Yifan;Yamaguchi Takuya;Morifuji Masato;Kajii Hirotake;Kondow Masahiko
本文从理论上分析了用于波分复用（WDM）光通信的二维光子晶体（CirD）激光器中的圆形缺陷。通过将CirD激光器耦合到波导上，可以期望获得巨大的通信容量。例如，如果成功实现50 Gbps的高速激光操作，那么具有20个CirD激光器的WDM设备可以实现1 Tbps的通信容量。基于时域有限差分（FDTD）仿真结果，本研究通过求解二维速率方程研究了电流输出和高频特性，揭示了激光腔中过高的质量因子会降低弛豫振荡频率。当光子寿命为2 ps（质量因子≈3000）时，可同时获得5 μA的小阈值电流和40 GHz的高弛豫振荡频率。这些结果表明了利用CirD激光器开发WDM器件的潜力。
Herein a circular defect in a 2D photonic crystal (CirD) laser for wavelength division multiplexing (WDM) optical communications is theoretically analyzed. By coupling CirD lasers to a waveguide, a huge communication capacity can be expected. For example, if high‐speed, 50 Gbps laser operations are successfully achieved, WDM devices with 20 CirD lasers could achieve a communication capacity of 1 Tbps. Based on finite‐difference time‐domain (FDTD) simulation results, in this study, both current‐output and high‐frequency characteristics are investigated by solving 2D rate equations, revealing that an excessively high‐quality factor in laser cavities reduces the relaxation‐oscillation frequency. When the photon lifetime is 2 ps, which corresponds to a quality factor of ≈3000, a small threshold current of 5 μA and a high relaxation‐oscillation frequency of 40 GHz can be simultaneously obtained. These results suggest the potential of developing a WDM device using CirD lasers.