Experimental Demonstration of 128QAM-OFDM Encoded Terahertz Signals over 20-km SMF

Yuan Zhang, M. Song, Haitao Zhang
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引用次数: 1

Abstract

Terahertz communication meets the increasing bandwidth requirements since its advantages of large capacity and high transmission rate. In this paper, an experimental scheme for transmitting 128QAM-OFDM terahertz signal on the optical fiber downlink is proposed. In this scheme, 10Gbit/s 128QAM-OFDM optical access signals are transmitted over 20 km single-mode fiber (SMF), and the coherent reception of 0.1 THz 128QAM-OFDM electrical signals is achieved by using the self-mixing technique. The results show that the downstream 128QAM-OFDM signal not only has higher spectral efficiency but also the value of the receiver sensitivity is lower than −10dBm when the bit error rate (BER) is 10−3.
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20公里SMF范围内128QAM-OFDM编码太赫兹信号的实验演示
太赫兹通信以其大容量、高传输速率的优点满足了日益增长的带宽需求。本文提出了一种在光纤下行链路上传输128QAM-OFDM太赫兹信号的实验方案。在该方案中,10Gbit/s 128QAM-OFDM光接入信号在20 km单模光纤(SMF)上传输,通过自混频技术实现0.1 THz 128QAM-OFDM电信号的相干接收。结果表明,下行128QAM-OFDM信号在误码率(BER)为10−3时,不仅具有较高的频谱效率,而且接收机灵敏度值低于−10dBm。
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