NDLI: A precise high-resolution near infrared continuous wave cavity ringdown spectrometer using a Fourier transform based wavelength calibration.

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A precise high-resolution near infrared continuous wave cavity ringdown spectrometer using a Fourier transform based wavelength calibration.

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A precise high-resolution near infrared continuous wave cavity ringdown spectrometer using a Fourier transform based wavelength calibration.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Fehling, Carsten Friedrichs, Gernot
Description	Country affiliation: Germany Author Affiliation: Fehling C ( Institut für Physikalische Chemie, Christian-Albrechts-Universität zu Kiel, Olshausenstr. 40, 24098 Kiel, Germany.)
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.
ISSN	00346748
Issue Number	5
Journal	Review of Scientific Instruments
Volume Number	81
e-ISSN	10897623
Language	English
Publisher	American Institute of Physics
Publisher Date	2010-05-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Physics Discipline Chemistry
Content Type	Text
Resource Type	Article
Subject	Medicine Instrumentation

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