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

 
: Dietz, R.J.B.; Globisch, B.; Roehle, H.; Göbel, T.; Schell, M.

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Institute of Electrical and Electronics Engineers -IEEE-:
40th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2015. Vol.2 : Hong Kong, China, 23 - 28 August 2015
Piscataway, NJ: IEEE, 2015
ISBN: 978-1-4799-8273-8
ISBN: 978-1-4799-8272-1
pp.904-905
International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) <40, 2015, Hong Kong>
English
Conference Paper
Fraunhofer HHI ()

Abstract
We present an all fiber coupled terahertz (THz) time domain spectroscopy (THz-TDS) system operating at 1.5 mu m 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.

: http://publica.fraunhofer.de/documents/N-404608.html