We propose a novel 1 Tbps super-channel terrestrial free-space optics (FSO) link using nine distinct Nyquist-wavelength division multiplexed (WDM) sub-carriers with 14 Gbaud symbol rate. Nine independent 112 Gbps polarisation multiplexed-16-quadrature amplitude modulated data streams are transported over each sub-carrier. Further, the sub-carriers are Nyquist-spaced using pre-filter with 15 GHz bandwidth, which is approximately equal to symbol rate. Through numerical simulations, we investigate the transmission range performance for varying attenuation levels due to external climate conditions. Bit-error rate (BER), optical signal to noise ratio (OSNR), and error vector magnitude (EVM %) are used as the evaluation metrics. The proposed Nyquist-WDM FSO transmission link demonstrates 7.46 bits/sec/Hz 1 Tbps information transmission. The proposed link exhibits large-bandwidth capacity to efficiently carry high-speed data for next generation long-haul optical wireless networks.

我们提出了一种新颖的1 Tbps超通道地面自由空间光学（FSO）链路，该链路使用了14个Gbaud符号率的九种不同的奈奎斯特波分复用（WDM）子载波。在每个子载波上传输九个独立的112 Gbps偏振复用16正交幅度调制数据流。此外，使用具有15 GHz带宽（约等于符号率）的预滤波器对子载波进行Nyquist间隔。通过数值模拟，我们研究了由于外部气候条件而导致的各种衰减水平下的传输范围性能。误码率（BER），光信噪比（OSNR）和误差矢量幅度（EVM％）用作评估指标。拟议的Nyquist-WDM FSO传输链路演示了7.46位/秒/ Hz 1 Tbps的信息传输。