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Proceedings Paper

Tunable-diode-laser-based one-component instrument for open-path measurements of trace concentrations of atmospheric gases
Author(s): Andrian I. Kouznetsov; Alexander I. Nadezhdinskii; Eugene V. Stepanov; M. A. Bloch
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Paper Abstract

A simple tunable diode laser based system for routine monitoring of concentrations of atmospheric gases was developed. The instrument operation is based on a PbSnSe diode laser emitting radiation at about 4.7 microns, and InSb photodiodes. Usually, the laser operates in multimode regime with an optical power of about 0.1 mW in the mode. The system consists of the emitter-receiver unit (including optical elements and a cryostat with liquid nitrogen, which contains the diode laser and two InSb photodetectors) and the retroreflector. The instrument has two limitations: (1) the gas should have absorption lines within the mid-IR spectral region (4-8 microns) and (2) the gas should be stable enough while in the instrument's cell to allow periodic calibration of the instument. The instrument, which in the manufacturing stage, is presently used for carbon monoxide monitoring.

Paper Details

Date Published: 12 February 1993
PDF: 7 pages
Proc. SPIE 1715, Optical Methods in Atmospheric Chemistry, (12 February 1993); doi: 10.1117/12.140223
Show Author Affiliations
Andrian I. Kouznetsov, General Physics Institute (Russia)
Alexander I. Nadezhdinskii, General Physics Institute (Russia)
Eugene V. Stepanov, General Physics Institute (Russia)
M. A. Bloch, Central Bureau for Unique Instrumentation (Russia)

Published in SPIE Proceedings Vol. 1715:
Optical Methods in Atmospheric Chemistry
Harold I. Schiff; Ulrich Platt, Editor(s)

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