caa a22 4500 445306076 CHVBK 20180317142613.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s10762-010-9751-8 doi (NATIONALLICENCE)springer-10.1007/s10762-010-9751-8 Compact cw Terahertz Spectrometer Pumped at 1.5 μm Wavelength [Elektronische Daten] [Dennis Stanze, Anselm Deninger, Axel Roggenbuck, Stephanie Schindler, Michael Schlak, Bernd Sartorius] A compact and low-cost continuous wave terahertz spectrometer operating at an optical wavelength of 1.5μm is presented. The spectrometer employs high power distributed feedback (DFB) laser diodes in integrated "butterfly” packages. No further optical amplification of the beating signal is required. An integrated photodiode antenna with an output power of 5μW at 500GHz is used as efficient terahertz emitter. Employing low-temperature grown (LT-) InGaAs/InAlAs photoconductive receivers as coherent detectors, SNR values of the terahertz power up to 75dB are attained at an integration time of 300ms. Accurate characterization of the thermal tuning behavior of the DFBs and precise thermal control yield an absolute accuracy of 1GHz and a resolution of better than 5MHz, without any on-line monitoring of the optical frequency. Due to the high frequency resolution no delay line is needed to vary the terahertz phase. The Author(s), 2010 Continuous wave terahertz system nationallicence Distributed feedback laser nationallicence Photodiode terahertz emitter nationallicence Photoconductive terahertz receiver nationallicence Terahertz spectroscopy nationallicence Stanze Dennis Fraunhofer Institute for Telecommunication, Heinrich Hertz Institut, Einsteinufer 37, 10587, Berlin, Germany aut Deninger Anselm TOPTICA Photonics, Lochhamer Schlag 19, 82166, Gräfelfing, Germany aut Roggenbuck Axel TOPTICA Photonics, Lochhamer Schlag 19, 82166, Gräfelfing, Germany aut Schindler Stephanie TOPTICA Photonics, Lochhamer Schlag 19, 82166, Gräfelfing, Germany aut Schlak Michael Fraunhofer Institute for Telecommunication, Heinrich Hertz Institut, Einsteinufer 37, 10587, Berlin, Germany aut Sartorius Bernd Fraunhofer Institute for Telecommunication, Heinrich Hertz Institut, Einsteinufer 37, 10587, Berlin, Germany aut Journal of Infrared, Millimeter, and Terahertz Waves Springer US; http://www.springer-ny.com 32/2(2011-02-01), 225-232 1866-6892 32:2<225 2011 32 10762 https://doi.org/10.1007/s10762-010-9751-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10762-010-9751-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Stanze Dennis Fraunhofer Institute for Telecommunication, Heinrich Hertz Institut, Einsteinufer 37, 10587, Berlin, Germany aut NATIONALLICENCE 700 1- Deninger Anselm TOPTICA Photonics, Lochhamer Schlag 19, 82166, Gräfelfing, Germany aut NATIONALLICENCE 700 1- Roggenbuck Axel TOPTICA Photonics, Lochhamer Schlag 19, 82166, Gräfelfing, Germany aut NATIONALLICENCE 700 1- Schindler Stephanie TOPTICA Photonics, Lochhamer Schlag 19, 82166, Gräfelfing, Germany aut NATIONALLICENCE 700 1- Schlak Michael Fraunhofer Institute for Telecommunication, Heinrich Hertz Institut, Einsteinufer 37, 10587, Berlin, Germany aut NATIONALLICENCE 700 1- Sartorius Bernd Fraunhofer Institute for Telecommunication, Heinrich Hertz Institut, Einsteinufer 37, 10587, Berlin, Germany aut NATIONALLICENCE 773 0- Journal of Infrared, Millimeter, and Terahertz Waves Springer US; http://www.springer-ny.com 32/2(2011-02-01), 225-232 1866-6892 32:2<225 2011 32 10762 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer