Applied Physics B

, Volume 75, Issue 2, pp 195–202

Methane analyzer based on TDL’s for measurements in the lower stratosphere: design and laboratory tests

  • F. D’Amato
  • P. Mazzinghi
  • F. Castagnoli

DOI: 10.1007/s00340-002-0981-x

Cite this article as:
D’Amato, F., Mazzinghi, P. & Castagnoli, F. Appl Phys B (2002) 75: 195. doi:10.1007/s00340-002-0981-x

Abstract.

This paper describes a tunable diode laser spectrometer for the in situ measurement of methane by high-resolution absorption spectroscopy of roto-vibrational lines, using a distributed feedback laser emitting in the near infrared (1.65 μm) and a multi-pass cell, with a two-tone detection scheme. The instrument was designed to be installed on the high-altitude aircraft M55 Geophysica, for high-sensitivity and high-temporal-resolution measurement of CH4, both as a greenhouse gas and as a tracer of air-mass motion. The instrument-design criteria to achieve the compactness, low weight, and ruggedness necessary for automatic operation on an unpressurized high-altitude aircraft are reported. Results of the laboratory testing are also shown and discussed.

PACS: 42.55.Px; 39.30.+w; 07.88.+y

Copyright information

© Springer-Verlag 2002

Authors and Affiliations

  • F. D’Amato
    • 1
  • P. Mazzinghi
    • 2
  • F. Castagnoli
    • 2
  1. 1.SIT s.r.l., Via delle Case Dipinte 17, 56100 Pisa, ItalyIT
  2. 2.Istituto Nazionale di Ottica Applicata, L.go E. Fermi 6, 50125 Firenze, ItalyIT
  3. 3.IFAC-CNR, Via Panciatichi 64, 50127 Firenze, ItalyIT