OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 28 — Oct. 1, 2010
  • pp: 5302–5308

Off-axis cavity enhanced spectroscopy based on a pulsed quantum cascade laser for sensitive detection of ammonia and ethylene

Jagadeeshwari Manne, Alan Lim, Wolfgang Jäger, and John Tulip  »View Author Affiliations


Applied Optics, Vol. 49, Issue 28, pp. 5302-5308 (2010)
http://dx.doi.org/10.1364/AO.49.005302


View Full Text Article

Enhanced HTML    Acrobat PDF (756 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

A pulsed, distributed feedback (DFB) quantum cascade (QC) laser centered at 970 cm 1 was used in combination with an off-axis cavity enhanced absorption (CEA) spectroscopic technique for the detection of ammonia and ethylene. Here, the laser is coupled into a high-finesse cavity with an optical path length of 76 m . The cavity is installed into a 53 cm long sample cell with a volume of 0.12 L . The laser is excited with short current pulses ( 5 10 ns ), and the pulse amplitude is modulated with an external current ramp, resulting in a 0.3 cm 1 frequency scan. A demodulation approach followed by numerical filtering was utilized to improve the signal-to-noise ratio. We demonstrated detection limits of ~15 ppb and 20 ppb for ammonia and ethylene, respectively, with less than 5 s averaging time.

© 2010 Optical Society of America

OCIS Codes
(280.3420) Remote sensing and sensors : Laser sensors
(300.1030) Spectroscopy : Absorption
(300.6340) Spectroscopy : Spectroscopy, infrared
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: January 15, 2010
Revised Manuscript: August 24, 2010
Manuscript Accepted: August 27, 2010
Published: September 24, 2010

Citation
Jagadeeshwari Manne, Alan Lim, Wolfgang Jäger, and John Tulip, "Off-axis cavity enhanced spectroscopy based on a pulsed quantum cascade laser for sensitive detection of ammonia and ethylene," Appl. Opt. 49, 5302-5308 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-28-5302

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

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited