This paper presents effect of reflection-induced optical feedback on the post-detection signal power in an intensity modulation-direct detection (IM-DD) fiber optic transreceiver. The detected signal power reduction depends on the reflectivity of the external reflector as well as on the reflectivity of the laser cavity output facet. In the present dual reflector system, any increase in FPLD end facet reflectance leads to a less reduction in detected signal power due to optical feedback. Also, an increase in reflectivity of the external reflectors results in further reduction of detected signal power due to optical feedback. The experimental observation is in agreement with the detailed theory developed.

中文翻译：

---

由于光反馈，检测后调制信号功率降低

本文介绍了反射引起的光反馈对强度调制直接检测 (IM-DD) 光纤收发器中的检测后信号功率的影响。检测到的信号功率降低取决于外部反射器的反射率以及激光腔输出面的反射率。在当前的双反射器系统中，FPLD 端面反射率的任何增加都会导致检测到的信号功率由于光反馈而减少较少。此外，由于光反馈，外部反射器反射率的增加导致检测信号功率的进一步降低。实验观察与发展的详细理论一致。