Abstract Asymmetric nonlinear gain in tunable three sections distributed Bragg reflector (3s-DBR) laser is theoretically studied with multimode rate equations. It is found, with a special design, anomalous interaction between adjacent modes can be used to enhance modulation bandwidth of the 3s-DBR laser. Tuning characteristics and direct modulation response of a designed laser are simulated and analyzed. Results show that, by taking advantages of the nonlinear gain, 3 dB bandwidth of the 3s-DBR laser could be improved from 18 GHz up to 27 GHz, 9 nm tuning range is kept meanwhile. Combining high speed direct modulation with tunability, this design may be attractive for future short reach optical communication.

中文翻译：

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利用非对称非线性增益提高可调三段分布式布拉格反射激光器的调制带宽：设计与仿真

摘要 利用多模速率方程对可调三段分布式布拉格反射(3s-DBR)激光器的非对称非线性增益进行了理论研究。研究发现，通过特殊设计，可以利用相邻模式之间的异常相互作用来提高3s-DBR激光器的调制带宽。对设计的激光器的调谐特性和直接调制响应进行了仿真和分析。结果表明，利用非线性增益，3s-DBR激光器的3 dB带宽可以从18 GHz提高到27 GHz，同时保持9 nm的调谐范围。将高速直接调制与可调性相结合，这种设计可能对未来的短距离光通信具有吸引力。