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Applied Optics

Applied Optics


  • Vol. 37, Iss. 12 — Apr. 20, 1998
  • pp: 2499–2501

Frequency modulation multiplexing for simultaneous detection of multiple gases by use of wavelength modulation spectroscopy with diode lasers

Daniel B. Oh, Mark E. Paige, and David S. Bomse  »View Author Affiliations

Applied Optics, Vol. 37, Issue 12, pp. 2499-2501 (1998)

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Modulation frequency multiplexing provides a straightforward method, analogous to television or radio broadcasting, for performing simultaneous detection of multiple gases by use of wavelength modulation spectroscopy with diode lasers. When fiber-optic coupled lasers are used, our approach guarantees that all beams transit the same optical path and impinge on the same detector. Each laser is modulated at a different frequency and the detector output is processed by a set of lock-in amplifiers, one for each laser, to measure the absorbance encountered by each laser.

© 1998 Optical Society of America

OCIS Codes
(060.4230) Fiber optics and optical communications : Multiplexing
(130.6010) Integrated optics : Sensors
(140.2020) Lasers and laser optics : Diode lasers
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(300.0300) Spectroscopy : Spectroscopy
(300.6380) Spectroscopy : Spectroscopy, modulation

Original Manuscript: December 15, 1997
Revised Manuscript: January 5, 1998
Published: April 20, 1998

Daniel B. Oh, Mark E. Paige, and David S. Bomse, "Frequency modulation multiplexing for simultaneous detection of multiple gases by use of wavelength modulation spectroscopy with diode lasers," Appl. Opt. 37, 2499-2501 (1998)

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  1. A. C. Stanton, J. A. Silver, “Measurements in the HCl 3 ← 0 band using a near-IR InGaAsP diode laser,” Appl. Opt. 24, 5009–5015 (1988). [CrossRef]
  2. J. A. Silver, D. S. Bomse, A. C. Stanton, “Diode laser measurements of trace concentrations of ammonia in an entrained-flow coal reactor,” Appl. Opt. 30, 1505–1511 (1991). [CrossRef] [PubMed]
  3. D. S. Bomse, “Dual-modulation laser line-locking scheme,” Appl. Opt. 30, 2922–2924 (1991). [CrossRef] [PubMed]
  4. J. A. Silver, “Frequency-modulation spectroscopy for trace species detection: theory and comparison among experimental methods,” Appl. Opt. 31, 707–717 (1992). [CrossRef] [PubMed]
  5. D. S. Bomse, A. C. Stanton, J. A. Silver, “Frequency modulation and wavelength modulation spectroscopies: comparison of experimental methods using a lead-salt diode laser,” Appl. Opt. 31, 718–731 (1992). [CrossRef] [PubMed]
  6. J. A. Silver, D. C. Hovde, “Near-infrared diode laser airborne hygrometer,” Rev. Sci. Instrum. 65, 1691–1694 (1994). [CrossRef]
  7. D. C. Hovde, A. C. Stanton, T. P. Meyers, D. R. Matt, “Methane emissions from a landfill measured by eddy correlation using a fast response diode laser sensor,” J. Atmos. Chem. 20, 141–162 (1995). [CrossRef]
  8. E. I. Moses, C. L. Tang, “High-sensitivity laser wavelength-modulation spectroscopy,” Opt. Lett. 1, 115–117 (1977). [CrossRef] [PubMed]
  9. J. Reid, M. El-Sherbiny, B. K. Garside, E. A. Ballik, “Sensitivity limits of a tunable diode laser spectrometer with application to the detection of NO2 at the 100-ppt level,” Appl. Opt. 19, 3349–3354 (1980). [CrossRef] [PubMed]
  10. J. Reid, D. Labrie, “Second harmonic detection with tunable diode lasers—comparison of experiment and theory,” Appl. Phys. B 26, 203–210 (1981). [CrossRef]
  11. D. T. Cassidy, J. Reid, “Atmospheric pressure monitoring of trace gases using tunable diode lasers,” Appl. Opt. 21, 1186–1190 (1982).
  12. M. P. Arroyo, T. P. Birbeck, D. S. Baer, R. K. Hanson, “Dual diode-laser fiber-optic diagnostic for water-vapor measurements,” Opt. Lett. 19, 1091–1093 (1994). [CrossRef] [PubMed]
  13. D. S. Baer, R. K. Hanson, M. E. Newfield, N. K. J. M. Gopaul, “Multiplexed diode-laser sensor system for simultaneous H2O, O2, and temperature measurements,” Opt. Lett. 19, 1900–1903 (1994). [CrossRef] [PubMed]
  14. L. S. Rothman, R. R. Gamache, R. H. Tipping, C. P. Rinsland, M. A. H. Smith, D. C. Benner, V. Malathy Devi, J.-M. Flaud, C. Camy-Peyret, A. Perrin, A. Goldman, S. T. Massie, L. R. Brown, R. A. Toth, “HITRAN database,” J. Quant. Spectrosc. Radiat. Transfer 48, 469–507 (1992). [CrossRef]
  15. D. R. Herriott, H. Kogelnik, R. Kompfner, “Off-axis paths in spherical mirror interferometers,” Appl. Opt. 3, 523–526 (1964). [CrossRef]

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