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Title: Optical feedback cavity-enhanced absorption spectroscopy with a 3.24 μm interband cascade laser

Abstract

The development of interband cascade lasers (ICLs) has made the strong C-H transitions in the 3 μm spectral region increasingly accessible. We present the demonstration of a single mode distributed feedback ICL coupled to a V-shaped optical cavity in an optical feedback cavity-enhanced absorption spectroscopy (OF-CEAS) experiment. We achieved a minimum detectable absorption coefficient, α{sub min}, of (7.1±0.2)×10{sup −8} cm{sup −1} for a spectrum of CH{sub 4} at 3.24 μm with a two second acquisition time (100 scans averaged). This corresponds to a detection limit of 3 ppb CH{sub 4} at atmospheric pressure, which is comparable to previously reported OF-CEAS instruments with diode lasers or quantum cascade lasers. The ability to frequency lock an ICL source in the important 3 μm region to an optical cavity holds great promise for future spectroscopic applications.

Authors:
;  [1]; ; ;  [2]
  1. Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Rd, Oxford OX1 3QZ (United Kingdom)
  2. Leibniz Institute for Plasma Science and Technology (INP Greifswald), Felix-Hausdorff-Str. 2, 17489 Greifswald (Germany)
Publication Date:
OSTI Identifier:
22412533
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 22; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION SPECTROSCOPY; ATMOSPHERIC PRESSURE; LASERS; METHANE; SENSITIVITY; SPECTRA

Citation Formats

Manfred, K. M., Ritchie, G. A. D., Lang, N., Röpcke, J., and Helden, J. H. van, E-mail: jean-pierre.vanhelden@inp-greifswald.de. Optical feedback cavity-enhanced absorption spectroscopy with a 3.24 μm interband cascade laser. United States: N. p., 2015. Web. doi:10.1063/1.4922149.
Manfred, K. M., Ritchie, G. A. D., Lang, N., Röpcke, J., & Helden, J. H. van, E-mail: jean-pierre.vanhelden@inp-greifswald.de. Optical feedback cavity-enhanced absorption spectroscopy with a 3.24 μm interband cascade laser. United States. doi:10.1063/1.4922149.
Manfred, K. M., Ritchie, G. A. D., Lang, N., Röpcke, J., and Helden, J. H. van, E-mail: jean-pierre.vanhelden@inp-greifswald.de. Mon . "Optical feedback cavity-enhanced absorption spectroscopy with a 3.24 μm interband cascade laser". United States. doi:10.1063/1.4922149.
@article{osti_22412533,
title = {Optical feedback cavity-enhanced absorption spectroscopy with a 3.24 μm interband cascade laser},
author = {Manfred, K. M. and Ritchie, G. A. D. and Lang, N. and Röpcke, J. and Helden, J. H. van, E-mail: jean-pierre.vanhelden@inp-greifswald.de},
abstractNote = {The development of interband cascade lasers (ICLs) has made the strong C-H transitions in the 3 μm spectral region increasingly accessible. We present the demonstration of a single mode distributed feedback ICL coupled to a V-shaped optical cavity in an optical feedback cavity-enhanced absorption spectroscopy (OF-CEAS) experiment. We achieved a minimum detectable absorption coefficient, α{sub min}, of (7.1±0.2)×10{sup −8} cm{sup −1} for a spectrum of CH{sub 4} at 3.24 μm with a two second acquisition time (100 scans averaged). This corresponds to a detection limit of 3 ppb CH{sub 4} at atmospheric pressure, which is comparable to previously reported OF-CEAS instruments with diode lasers or quantum cascade lasers. The ability to frequency lock an ICL source in the important 3 μm region to an optical cavity holds great promise for future spectroscopic applications.},
doi = {10.1063/1.4922149},
journal = {Applied Physics Letters},
number = 22,
volume = 106,
place = {United States},
year = {Mon Jun 01 00:00:00 EDT 2015},
month = {Mon Jun 01 00:00:00 EDT 2015}
}