Title :
Improvement of spectral shape of sub-terahertz wave excited by multimode laser diode
Author :
Nagashima, T. ; Sumikura, H. ; Morikawa, O. ; Hangyo, M.
Author_Institution :
Res. Center for Supercond. Photonics, Osaka Univ., Japan
Abstract :
A photomixing technique for sub-THz wave generation using multimode laser diode (MLD) has been developed. To date, sub-THz spectra had a comb structure that was not suitable for application to spectroscopy. We succeeded in obtaining the improved spectral shape with broad background by optimizing the spot size of the MLD light on the photomixer in a cross-correlation spectroscopy in the sub-THz region.
Keywords :
measurement by laser beam; millimetre wave measurement; millimetre wave spectroscopy; semiconductor lasers; cross-correlation spectroscopy; multimode laser diode; photomixing technique; spectral shape; spot size; sub-terahertz spectrometer; sub-terahertz wave; Diode lasers; Infrared detectors; Laser excitation; Lenses; Optical fiber couplers; Optical pulses; Radiation detectors; Spectral shape; Spectroscopy; Superconducting photodetectors;
Conference_Titel :
Infrared and Millimeter Waves, 2002. Conference Digest. Twenty Seventh International Conference on
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-7423-1
DOI :
10.1109/ICIMW.2002.1076137
