Title :
Harmonic-frequency-comb spectroscopy in the mid infrared and THz regions
Author :
Keilmann, Fritz ; Brehm, Markus ; Schliesser, Albert ; Von Ribbeck, Hans-Georg
Author_Institution :
Max-Planck-Inst. fur Biochem. & Center for Nanosci., Munich
Abstract :
One implementation of coherent frequency-comb spectroscopy (c-FTIR) uses GaSe for the mid-infrared wavelength range 9-11 mum. Here we use direct interference of sample and reference beams on a power detector, the output of which is online-Fourier transformed in a digital scope. This paper illustrate this setup and the achievement of 3000 spectra of NH3 transmittance taken in 3 s of continuous recording.
Keywords :
Fourier transform optics; infrared spectroscopy; optical frequency conversion; spectroscopic light sources; submillimetre wave spectroscopy; GaSe; coherent frequency-comb spectroscopy; digital scope; direct interference; harmonic-frequency-comb spectroscopy; mid infrared region; online-Fourier transformation; terhertz regions; transmittance spectra; wavelength 9 mum to 11 mum; Frequency; Gases; Infrared spectra; Interference; Laser beams; Optical scattering; Optical sensors; Phase detection; Phase measurement; Spectroscopy;
Conference_Titel :
Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-0930-3
Electronic_ISBN :
978-1-4244-0931-0
DOI :
10.1109/CLEOE-IQEC.2007.4387066
