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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 15 — Aug. 1, 2012
  • pp: 3285–3287

Mid-infrared virtually imaged phased array spectrometer for rapid and broadband trace gas detection

Lora Nugent-Glandorf, Tyler Neely, Florian Adler, Adam J. Fleisher, Kevin C. Cossel, Bryce Bjork, Tim Dinneen, Jun Ye, and Scott A. Diddams  »View Author Affiliations


Optics Letters, Vol. 37, Issue 15, pp. 3285-3287 (2012)
http://dx.doi.org/10.1364/OL.37.003285


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Abstract

We present and characterize a two-dimensional (2D) imaging spectrometer based on a virtually imaged phased array (VIPA) disperser for rapid, high-resolution molecular detection using mid-infrared (MIR) frequency combs at 3.1 and 3.8 μm. We demonstrate detection of CH4 at 3.1 μm with >3750 resolution elements spanning >80nm with 600MHz resolution in a <10μs acquisition time. In addition to broadband detection, we also demonstrate rapid, time-resolved single-image detection by capturing dynamic concentration changes of CH4 at a rate of 375 frames per second. Changes in absorption above the noise floor of 5×104 are readily detected on the millisecond time scale, leading to important future applications such as real-time monitoring of trace gas concentrations and detection of reactive intermediates.

© 2012 Optical Society of America

OCIS Codes
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: May 31, 2012
Manuscript Accepted: June 16, 2012
Published: July 31, 2012

Citation
Lora Nugent-Glandorf, Tyler Neely, Florian Adler, Adam J. Fleisher, Kevin C. Cossel, Bryce Bjork, Tim Dinneen, Jun Ye, and Scott A. Diddams, "Mid-infrared virtually imaged phased array spectrometer for rapid and broadband trace gas detection," Opt. Lett. 37, 3285-3287 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-15-3285


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References

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