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SOA-based optical processing for terahertz time-domain spectroscopy

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3 Author(s)
J. Palací ; Nanophotonics Technology Center, Universitat Politecnica de Valencia, Camino de Vera s/n, Valencia 46022, Spain ; A. Bockelt ; B. Vidal

All-fibre control of a terahertz time-domain spectroscopy system based on photoconductive antennas fed with optical sources in the telecom band is demonstrated. A semiconductor optical amplifier (SOA) is used to obtain continuously tunable delays on 100 fs optical pulses. Additionally, the modulation required to carry out lock-in detection can be simultaneously performed avoiding mechanical choppers or high-voltage alternate biasing of the transmitter antenna.

Published in:

Electronics Letters  (Volume:48 ,  Issue: 10 )