Communication band becomes more and more crowded, terahertz (THz) technology can obtain more than 300GHz frequency, and easy to obtain the transmission rate of Gbit/s. This paper reports a kind of wide-band THz communication based on a THz time domain spectroscopy (TDS) system, which uses photoconductive antenna as a THz source, ZnTe crystal as a receiver. In our experiment, the modulation mode is the on-off keying (OOK)  method based on amplitude-shift keying (ASK) .An audio signal was generated by program, and we put the signal into a voltage amplifier and increase the peak-to-peak voltage, which was used as a bias voltage on the photoconductive antenna. Then the signal to noise ratio of the received audio signal is 51.4. The wide-band terahertz communication on ambient atmosphere was demonstrated on a THz time domain spectroscopy system. The received signal has the same spectrum with the original audio signal, but noisier than the original signal.
© 2014 Optical Society of AmericaPDF Article
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