Theoretical and experimental study of a terahertz time-domain spectrometer based on photoconductive antenna
© 2014 IEEE. We construct a terahertz time-domain spectrometer (THz-TDS) system based on photoconductive antenna (PCA). A 800 nm Ti:sapphire femtosecond laser with 80 MHz repetition rate provides the pump and probe laser pulse, which has a 45 fs pulse width (as short as 15 fs is available) and as much as 400 mW power. Two commercial PCAs with 34 um and 6 um gap size are used as the emitter and receiver, respectively. We characterize this system by measuring its absolute radiated THz power, spectral bandwidth, signal-to-noise ratio (SNR) and dynamic range. Using this system, we study the response of the PCA as the emitter and receiver to the laser power and/or biased DC voltage, as well as their influences on the SNR and dynamic range of the TDS system.
Zhang, J; Ng, WR; Tuo, M; Liang, M; Golish, DR; Gehm, ME; Xin, H
2014 United States National Committee of Ursi National Radio Science Meeting, Usnc Ursi Nrsm 2014
International Standard Book Number 13 (ISBN-13)
Digital Object Identifier (DOI)