A precise high-resolution near infrared continuous wave cavity ringdown spectrometer using a Fourier transform based wavelength calibration
- 1 May 2010
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 81 (5), 053109
- https://doi.org/10.1063/1.3422254
Abstract
A wavelength calibration technique is described, which is based on a combination of a Fourier transform wavelength meter and a distributed feedback laser locked to a molecular transition as a frequency marker in the spectrum. The technique provides a reliable wavelength scale to be used in high resolution continuous wave cavity ringdown spectroscopy without need for stabilization of the probe laser and accurately known molecular transitions in the scanned wavelength range. Due to a continuous reference measurement, ambient influences on the laser sources are effectively suppressed. As an example, we measured highly resolved cavity ringdown spectra of N(2)O isotopomers and determined the line strength of several absorption lines at a wavelength around 1687 nm. A near infrared wavelength precision of 6 x 10(-8) and an absolute accuracy on the order of 1 x 10(-7) was readily achieved. The general concept is easy to implement and can be further refined by using additional reference lasers, thus holding the potential of even higher wavelength accuracy.This publication has 31 references indexed in Scilit:
- Spectroscopic database of CO2 line parameters: 4300–7000cm−1Journal of Quantitative Spectroscopy and Radiative Transfer, 2008
- Highly accurate laser wavelength meter based on Doppler effectOptics Communications, 2006
- 4 Cavity ring-down and cavity enhanced spectroscopy using diode lasersAnnual Reports Section "C" (Physical Chemistry), 2005
- Cavity ring-down spectroscopy: Experimental schemes and applicationsInternational Reviews in Physical Chemistry, 2000
- THE HITRAN MOLECULAR SPECTROSCOPIC DATABASE AND HAWKS (HITRAN ATMOSPHERIC WORKSTATION): 1996 EDITIONJournal of Quantitative Spectroscopy and Radiative Transfer, 1998
- CW cavity ring down spectroscopyChemical Physics Letters, 1997
- Recent advances in displacement measuring interferometryMeasurement Science and Technology, 1993
- Mirror reflectometer based on optical cavity decay timeApplied Optics, 1984
- Precision in Condensed Phase Vibrational SpectroscopyApplied Spectroscopy, 1982
- Simultaneous Effect of Doppler and Foreign Gas Broadening on Spectral LinesPhysical Review B, 1961