Title :
Fiber coupled terahertz time domain spectroscopy system based on InGaAs/InAlAs photoconductors with 100 dB dynamic range
Author :
R. J. B. Dietz;B. Globisch;H. Roehle;T. Göbel;M. Schell
Author_Institution :
Fraunhofer Institute for Telecommunication, Heinrich Hertz Institute, Einsteinufer 37, 10587 Berlin, Germany
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.
Keywords :
"Detectors","Indium gallium arsenide","Dynamic range","Optical variables measurement","Optical pulses","Adaptive optics"
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015 40th International Conference on
Electronic_ISBN :
2162-2035
DOI :
10.1109/IRMMW-THz.2015.7327408
