✦ LIBER ✦

A Near-Infrared Diode Laser Spectrometer of High Resolution and Wide Scanning Range

✍ Scribed by Michael Thompson; John G Baker; Nicholas J Bowring

Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 169 KB
Volume: 216
Category: Article
ISSN: 0022-2852
DOI: 10.1006/jmsp.2002.8680

No coin nor oath required. For personal study only.

✦ Synopsis

We have constructed a simple and inexpensive diode laser spectrometer in which the source is locked to and tracked by a scanning Fabry-Perot interferometer and in which absolute frequency measurements are made by markers generated by a further Fabry-Perot interferometer, itself locked either to a selected spectral line of the sample or to the saturated absorption of a D2 line in atomic Rb at 780 nm. With this technique we have been able to obtain near-continuous spectra stretching over the range from 12 640 to 12 780 cm -1 at Doppler-limited resolution. In this paper we describe the principles of the spectrometer along with absolute frequency measurements of a number of overtone rovibrational transitions in two isotopomers of acetylene. The combination relations formed by these transitions demonstrate the accuracy of our measurements to be typically ±0.0002 cm -1 .

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