Laser diodes, in general, are sensitive to optical feedback, especially with regard to maintaining single-frequency operation. Until now, however, the feedback sensitivity of high-power devices such as single-frequency distributed Bragg reflector (DBR) tapered laser diodes has not been investigated in quantitative detail. In this paper, we analyze the impact of very weak optical feedback between ${-}{{105}}\;{\rm{dB}}$ and ${-}{{40}}\;{\rm{dB}}$ on a high-power DBR tapered laser diode. The measurement setup is validated using a typical DFB laser diode. The results are in good agreement with the theory at low-feedback levels.

中文翻译：

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测量单频大功率激光二极管对光反馈的灵敏度

通常，激光二极管对光反馈敏感，特别是在保持单频工作方面。但是，到目前为止，尚未对定量单功率分布式布拉格反射器（DBR）锥形激光二极管等大功率设备的反馈灵敏度进行研究。在本文中，我们分析了$ {-} {{105}} \; {\ rm {dB}} $和$ {-} {{40}} \; {\ rm {dB }} $用于大功率DBR锥形激光二极管。使用典型的DFB激光二极管可以验证测量设置。结果与低反馈水平的理论非常吻合。