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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN 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)
http://dx.doi.org/10.1364/AO.37.002499


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Abstract

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

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

Citation
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)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-12-2499

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