Title :
Fiber-coupled terahertz TDS combining high speed operation with superior dynamic range
Author :
Roehle, Helmut ; Dietz, Roman ; Sartorius, Bernd ; Schell, Martin
Author_Institution :
Fraunhofer Heinrich Hertz Inst., Berlin, Germany
Abstract :
Highly efficient mesa-structured 1.5 μm photoconductive antennas, direct detection without lock-in amplifier, and a voice-coil mirror drive with accurate position sensor are merged to a fast and precise system. A pulse trace of 25 ps is measured every 50 ms, and integration over 15 s results in a superior 75 dB dynamic range and a bandwidth of 5 THz.
Keywords :
antennas; high-speed optical techniques; optical fibre couplers; terahertz wave spectra; accurate position sensor; bandwidth 5 THz; direct detection; fiber-coupled terahertz TDS; high speed operation; highly efficient mesa-structured photoconductive antennas; superior dynamic range; time 25 ps; time 50 ms; wavelength 1.5 mum; Accuracy; Bandwidth; Dynamic range; Mirrors; Noise; Optical fiber sensors; Pulse measurements;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on
Conference_Location :
Wollongong, NSW
Print_ISBN :
978-1-4673-1598-2
Electronic_ISBN :
2162-2027
DOI :
10.1109/IRMMW-THz.2012.6380181
