Coherent Generation and Detection of Continuous Terahertz Waves Using Two Photomixers Driven by Laser Diodes
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- Mendis, R., Sydlo, C., Sigmund, J. et al. Int J Infrared Milli Waves (2005) 26: 201. doi:10.1007/s10762-005-3000-6
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We report on a completely coherent, tunable, continuous-wave THz system where, for the first-time, both the transmitter and receiver are log-periodic-antenna coupled LTG-GaAs based finger-photomixers. This compact room-temperature system exhibits signal-to-noise ratios (> 103) comparable to or better than what is reported in the literature, and has potential applications in high-resolution spectroscopy and imaging. For the purpose of demonstration, we also present results of spectroscopy measurements carried out on fused silica, which are in agreement with previously published THz-TDS measurements.