OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 34 — Dec. 1, 2012
  • pp: 8057–8067

Multiwavelength diode-laser absorption spectroscopy using external intensity modulation by semiconductor optical amplifiers

Solon Karagiannopoulos, Edward Cheadle, Paul Wright, Stylianos Tsekenis, and Hugh McCann  »View Author Affiliations


Applied Optics, Vol. 51, Issue 34, pp. 8057-8067 (2012)
http://dx.doi.org/10.1364/AO.51.008057


View Full Text Article

Enhanced HTML    Acrobat PDF (1406 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

A novel opto-electronic scheme for line-of-sight Near-IR gas absorption measurement based on direct absorption spectroscopy (DAS) is reported. A diode-laser-based, multiwavelength system is designed for future application in nonintrusive, high temporal resolution tomographic imaging of H2O in internal combustion engines. DAS is implemented with semiconductor optical amplifiers (SOAs) to enable wavelength multiplexing and to induce external intensity modulation for phase-sensitive detection. Two overtone water transitions in the Near-IR have been selected for ratiometric temperature compensation to enable concentration measurements, and an additional wavelength is used to account for nonabsorbing attenuation. A wavelength scanning approach was used to evaluate the new modulation technique, and showed excellent absorption line recovery. Fixed-wavelength, time-division-multiplexing operation with SOAs has also been demonstrated. To the best of our knowledge this is the first time SOAs have been used for modulation and switching in a spectroscopic application. With appropriate diode laser selection this scheme can be also used for other chemical species absorption measurements.

© 2012 Optical Society of America

OCIS Codes
(250.5980) Optoelectronics : Semiconductor optical amplifiers
(300.1030) Spectroscopy : Absorption

ToC Category:
Spectroscopy

History
Original Manuscript: July 30, 2012
Revised Manuscript: October 22, 2012
Manuscript Accepted: October 22, 2012
Published: November 27, 2012

Citation
Solon Karagiannopoulos, Edward Cheadle, Paul Wright, Stylianos Tsekenis, and Hugh McCann, "Multiwavelength diode-laser absorption spectroscopy using external intensity modulation by semiconductor optical amplifiers," Appl. Opt. 51, 8057-8067 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-34-8057

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited