Title :
Laser Difference-Frequency Generation in the Mid-Infrared and Applications to High-Resolution Molecular Spectroscopy and Trace Gas Detection
Author :
Chen, Weidong ; Cousin, Julien ; Poullet, Emmanuelle ; Boucher, Daniel ; Gao, Xiaoming ; Sigrist, Markus W. ; Tittel, Frank K.
Author_Institution :
Univ. du Littoral Cote d´´Opale, Dunkerque
Abstract :
We report on the development of a widely tunable continuous-wave (CW) laser spectrometer based on difference-frequency generation (DFG) in a nonlinear optical crystal, which operates in the mid-infrared (MIR) spectral region of 3-20 mum with a Doppler linewidth limited spectral resolution. The state-of-the-art of CW DFG techniques as well as the applications of the DFG-based laser source to high-resolution molecular spectroscopy and trace gas spectroscopy were presented.
Keywords :
infrared sources; infrared spectroscopy; laser tuning; measurement by laser beam; optical frequency conversion; optical materials; spectral line breadth; spectrochemical analysis; CW DFG techniques; DFG-based laser source; Doppler linewidth limited spectral resolution; high-resolution molecular spectroscopy; laser difference-frequency generation; nonlinear optical crystal; trace gas detection; trace gas spectroscopy; tunable continuous-wave laser spectrometer; wavelength 3 micron to 20 micron; Biomedical optical imaging; Chemical lasers; Gas lasers; Infrared spectra; Laser theory; Nonlinear optics; Optical mixing; Optical sensors; Spectroscopy; Tunable circuits and devices;
Conference_Titel :
Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics, 2006. IRMMW-THz 2006. Joint 31st International Conference on
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0400-2
Electronic_ISBN :
1-4244-0400-2
DOI :
10.1109/ICIMW.2006.368790
