Fiber coupled terahertz time domain spectroscopy system based on InGaAs/InAlAs photoconductors with 100 dB dynamic range

R J B Dietz ,Thorsten Göbel ,Björn Globisch ,H Roehle ,Martin Schell

doi:10.1109/irmmw-thz.2015.7327408

Fiber coupled terahertz time domain spectroscopy system based on InGaAs/InAlAs photoconductors with 100 dB dynamic range

R J B Dietz , Thorsten Göbel + Show 3 more

https://doi.org/10.1109/irmmw-thz.2015.7327408

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Publication Date: Aug 1, 2015

Citations: 5

Affiliation: Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute

#Terahertz Time Domain Spectroscopy System #Terahertz Time Domain Spectroscopy + Show 8 more

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Abstract

We present an all fiber coupled terahertz (THz) time domain spectroscopy (THz-TDS) system operating at 1.5 μm wavelength with very high dynamic range. The broadband THz radiation is generated by a high mobility InGaAs/InAlAs heterostructure photoconductive emitter. For the detection a low temperature grown (LTG) Be-doped InGaAs/InAlAs heterostructure is employed. Both, detector and emitter, are packaged into fiber-coupled housings. The system reaches a dynamic range in excess of 100 dB and a spectral bandwidth of 6.5 THz.

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