The challenge of asymmetric bidirectional optical wireless communication is majority resulted from the power shortage of uplink transmission, since it is double the downlink transmission distance. In this research, a wavelength tunable self-injection locking (SIL) system based on free-space configuration for uplink transmission in a modulated retroreflector based asymmetric bidirectional optical wireless communication system is proposed and experimentally evaluated. The proposed works were investigated from access node (AN) to terminal user(TU) respectively. A power gain of 34.51 dB, and uplink data transmission test over 2 Gbits/s, with Q-factors beyond FEC limit, are reported.

中文翻译：

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基于自注入锁定的TDM-PON波长可调非对称B-OWC系统

非对称双向光无线通信的挑战主要是上行链路传输功率不足导致的，因为它是下行链路传输距离的两倍。在这项研究中，提出了一种基于自由空间配置的波长可调谐自注入锁定（SIL）系统，用于基于调制后向反射器的非对称双向光无线通信系统中的上行链路传输，并进行了实验评估。分别从接入节点（AN）到终端用户（TU）对提出的工作进行了研究。据报道，功率增益为34.51 dB，Q因子超过FEC限制，上行链路数据传输测试超过2 Gbits / s。