We propose a novel technique to regenerate the optical signal in a relay-based free space optical link. Our proposed regenerator is based on an Electro-absorption modulator whose optical input is the signal to be regenerated, while the electrical input is extracted by processing a part of the optical input signal. The signal at the output of the proposed regenerator based relay has lower intensity fluctuations compared to a conventional optical amplifier based relay. We have tested our proposed regenerator-based relay under medium and strong turbulence conditions by choosing the refractive index structure parameters as $5\times 10^{-15}\,\,m^{-2/3}$ and $5\times 10^{-10}\,\,m^{-2/3}$ , respectively. Our simulation results show that the proposed regenerator-based relay reduces the received power penalty by $3.5~dB$ compared to the conventional amplifier-based relay, under strong turbulence conditions.

中文翻译：

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一种新的自由空间光通信系统再生技术

我们提出了一种在基于中继的自由空间光链路中再生光信号的新技术。我们提出的再生器基于电吸收调制器，其光输入是要再生的信号，而电输入是通过处理一部分光输入信号来提取的。与传统的基于光放大器的继电器相比，所提出的基于再生器的继电器输出端的信号具有较低的强度波动。我们通过选择折射率结构参数，在中等和强湍流条件下测试了我们提出的基于再生器的继电器 $5\times 10^{-15}\,\,m^{-2/3}$ 和 $5\times 10^{-10}\,\,m^{-2/3}$ ， 分别。我们的仿真结果表明，所提出的基于再生器的中继减少了接收功率损失 $3.5~dB$ 与传统的基于放大器的继电器相比，在强湍流条件下。