THz Time-Domain Spectrometer Based on LT-InGaAs Photoconductive Antennas Exited by a 1.55 μm Fibre Laser

We present a THz time-domain spectrometer based on a 1.55 mum fibre laser and LT- InGaAs/InAlAs MQW photoconductive antennas. We discuss the system stability and present first spectroscopic data taken with the system.