Title :
Terahertz spectroscopy using photomixing of multimode and singlemode laser diodes
Author :
Morikawa, O. ; Fujita, Masayuki ; Hangyo, M.
Author_Institution :
Japan Coast Guard Acad., Kure, Japan
Abstract :
The photomixing technique is applied to the sub-THz spectroscopic system with a continuous wave multimode laser diode (CW-MLD) to extend the spectral range. In the Fourier spectrum of the signal waveform a new broad component is found to appear in the higher frequency region of 0.5-1.0 THz by mixing the light from the CW-MLD with light from a continuous wave single mode laser diode. This result enables us to extend the frequency range of spectroscopy up to about 1 THz.
Keywords :
Fourier transform spectroscopy; laser modes; measurement by laser beam; semiconductor lasers; terahertz spectroscopy; Fourier spectrum; continuous wave multimode laser diode; frequency 0.5 THz to 1.0 THz; light mixing; photomixing technique; signal waveform; single mode laser diode; sub-THz spectroscopic system; Diode lasers; Fluctuations; Frequency measurement; Helium; Optical pulses; Solids; Spectroscopy; Superluminescent diodes; Time measurement; Ultrafast optics;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on
Conference_Location :
Busan
Print_ISBN :
978-1-4244-5416-7
Electronic_ISBN :
978-1-4244-5417-4
DOI :
10.1109/ICIMW.2009.5324684
