It is shown theoretically that the feedback sensitivity of Distributed Bragg Reflector laser diodes with low-loss Bragg section decreases with the length of the Bragg section and also can be decreased by detuning from the Bragg peak. The effect of detuning is not only due to a change in effective linewidth enhancement factor, but also due to a change of the effective cavity length. The results can be applied also to laser diodes coupled on one side to one or more ring resonators Such lasers can have very weak feedback sensitivity.

中文翻译：

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DBR 型激光二极管的反馈灵敏度

理论上表明，具有低损耗布拉格截面的分布式布拉格反射激光二极管的反馈灵敏度随着布拉格截面的长度而降低，并且也可以通过从布拉格峰失谐来降低。失谐的影响不仅是由于有效线宽增强因子的变化，而且是由于有效腔长度的变化。结果也可以应用于在一侧耦合到一个或多个环形谐振器的激光二极管。这种激光器可能具有非常弱的反馈灵敏度。