Real-time video signal transmission over a terahertz communication link

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2013,（11）
• 页码范围: 72-74
• 页数: 3页
• 语种: 英文
• DOI: 10.3788/COL201311.112001.

摘要

A 2.4-m communication link operating at 3.9 THz based on a terahertz quantum cascade laser and a terahertz quantum well photodetector (THz QWP) are introduced.The lumped electrical models of THz QWP for small signals are presented.A discussion of the bandwidth limit of the detecting circuit is presented.Using direct on-off-keying modulation and intensity detection,the transmission of digital video signal with a data rate of 2.5 Mb/s is demonstrated.Pseudo-random binary sequences are transmitted to investigate the bit-error rate (BER) at different rates.Result shows the error free transmission when the rate is below 5 Mb/s.