Title :
Absorption line profile measurement of rovibrational transition of acetylene molecule using a fiber comb spectrometer
Author :
Yamada, K.M.T. ; Onae, A. ; Hong, F.-L. ; Inaba, H. ; Nakajima, Y. ; Matsumoto, H. ; Ito, F. ; Shimizu, T.
Author_Institution :
Inst. for Environ. Manage. Technol. (EMTech), AIST, Tsukuba
Abstract :
We have been developing a spectrometer to record an accurate absorption line profile of a rovibrational transition of acetylene in the 1.54 mum region using an extended cavity laser diode (ECLD) and a mode-locked fiber frequency comb. With the spectrometer, we have recorded the absorption line profiles for various pressures and have observed the collisional narrowing effect on the inhomogeneous Gaussian widths. Information of the Gaussian width which reflects the Maxwell-Boltzmann distribution can be used to estimate accurate temperature of the sample gas and also have possibility to provide a way to determine the Boltzmann constant.
Keywords :
infrared spectra; organic compounds; rotational-vibrational states; spectral line intensity; statistical mechanics; Boltzmann constant; Gaussian widths; Maxwell-Boltzmann distribution; NIR spectra; absorption line profile measurement; acetylene molecule; collisional narrowing effect; extended cavity laser diode; fiber comb spectrometer; rovibrational transition; wavelength 1.54 mum; Absorption; Frequency; Gas lasers; Optical attenuators; Optical fiber polarization; Optical noise; Optical recording; Servomechanisms; Spectroscopy; Uncertainty;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2008. CPEM 2008. Conference on
Conference_Location :
Broomfield, CO
Print_ISBN :
978-1-4244-2399-6
Electronic_ISBN :
978-1-4244-2400-9
DOI :
10.1109/CPEM.2008.4574692
