Cai Yuancheng, Xiang Shitong, Zhu Min, Luo Wei, Lei Mingzheng, Zhang Jiao, Hua Bingchang, Zou Yucong, Fang Miaomiao, Tian Liang, Chen Xingyu, Yu Jianjun
Opt Lett. 2023 Sep 1;48(17):4554-4557. doi: 10.1364/OL.498886.
This Letter demonstrates a novel, to the best of knowledge, overlapping single-sideband (OSSB) transmission scheme for spectrally efficient multi-service fiber-wireless (FiWi) access in a low-cost direct-detection (DD) THz system. Utilizing the proposed OSSB scheme, user data from different services can share the same spectrum resource yet can be successfully demodulated via one cost-effective DD THz receiver in conjunction with the Kramers-Kronig (KK) based SSB field reconstruction and look-up table (LUT) enabled signal separation algorithms. A proof-of-principle experiment is conducted. Based on an IQ modulator and a single THz zero-bias diode (ZBD), two independent 10-GBd quadrature phase shift keying (QPSK) signals with an overlapped spectrum are successfully demodulated after 20-km fiber and up to 3-m wireless transmission at the 300-GHz band. To the best of our knowledge, this is the first demonstration of multi-service FiWi access with an OSSB format in a 300-GHz DD THz system.
据我们所知，本文展示了一种新颖的重叠单边带（OSSB）传输方案，用于低成本直接检测（DD）太赫兹系统中频谱高效的多业务光纤无线（FiWi）接入。利用所提出的OSSB方案，来自不同业务的用户数据可以共享相同的频谱资源，并且可以通过一个经济高效的DD太赫兹接收器，结合基于克拉默斯 - 克朗尼格（KK）的单边带场重建和启用查找表（LUT）的信号分离算法，成功地进行解调。进行了原理验证实验。基于一个IQ调制器和一个单太赫兹零偏置二极管（ZBD），在300 GHz频段经过20公里光纤和长达3米的无线传输后，成功解调了两个具有重叠频谱的独立10 GBd正交相移键控（QPSK）信号。据我们所知，这是在300 GHz DD太赫兹系统中首次展示采用OSSB格式的多业务FiWi接入。
