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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Glenn D. Boreman
  • Vol. 44, Iss. 28 — Oct. 1, 2005
  • pp: 5972–5989

SPIRALE: a multispecies in situ balloonborne instrument with six tunable diode laser spectrometers

Guy Moreau, Claude Robert, Valéry Catoire, Michel Chartier, Claude Camy-Peyret, Nathalie Huret, Michel Pirre, Luc Pomathiod, and Gilles Chalumeau  »View Author Affiliations


Applied Optics, Vol. 44, Issue 28, pp. 5972-5989 (2005)
http://dx.doi.org/10.1364/AO.44.005972


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Abstract

The balloonborne SPIRALE (a French acronym for infrared absorption spectroscopy by tunable diode lasers) instrument has been developed for in situ measurements of several tracer and chemically active species in the stratosphere. Laser absorption takes place in an open Herriott multipass cell located under the balloon gondola, with six lead salt diode lasers as light sources. One mirror is located at the extremity of a deployable mast 3.5 m below the gondola, enabling the measurement of very low abundance species throughout a very long absorption path (up to 544 m). Three successful flights have produced concentration measurements of O3, CO, CO2, CH4, N2O, NO2, NO, HNO3, HCl, HOCl, COF2, and H2O2. Fast measurements (every 1.1 s) allow one to obtain a vertical resolution of 5 m for the profiles. A detection limit of a few tens of parts per trillion in volume has been demonstrated. Uncertainties of 3%–5% are estimated for the most abundant species rising to about 30% for the less abundant ones, mainly depending on the laser linewidth and the signal-to-noise ratio.

© 2005 Optical Society of America

OCIS Codes
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(010.4950) Atmospheric and oceanic optics : Ozone
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(230.4040) Optical devices : Mirrors
(300.1030) Spectroscopy : Absorption
(300.6260) Spectroscopy : Spectroscopy, diode lasers

ToC Category:
Atmospheric and oceanic optics

History
Original Manuscript: November 2, 2004
Revised Manuscript: March 7, 2005
Manuscript Accepted: March 7, 2005
Published: October 1, 2005

Citation
Guy Moreau, Claude Robert, Valéry Catoire, Michel Chartier, Claude Camy-Peyret, Nathalie Huret, Michel Pirre, Luc Pomathiod, and Gilles Chalumeau, "SPIRALE: a multispecies in situ balloonborne instrument with six tunable diode laser spectrometers," Appl. Opt. 44, 5972-5989 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-28-5972

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