A wireless terahertz digital transmission link is demonstrated, in which a quantum-cascade laser and a spectrally-matched quantum-well photodetector serve as the emitter and receiver, respectively. An on-off modulation scheme is used. By directly amplitude modulating the laser emitting at 4.13 THz, a 1.0-Mbps pseudorandom signal is transmitted over a distance of 2.2 m.
© 2013 Chinese Optics Letters
(040.2235) Detectors : Far infrared or terahertz
(060.2605) Fiber optics and optical communications : Free-space optical communication
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade
Lasers and Laser Optics
Zhiyong Tan, Zhen Chen, Juncheng Cao, and Huichun Liu, "Wireless terahertz light transmission based on digitally-modulated terahertz quantum-cascade laser," Chin. Opt. Lett. 11, 031403- (2013)