Journal article

Direct and wavelength modulation spectroscopy using a cw external cavity quantum cascade laser

Abstract:: A continuous wave external cavity quantum cascade laser (EC-QCL) operating between 1872 and 1958 cm-1 has been used to make rotationally resolved measurements in the fundamental band of nitric oxide at 140 mTorr, and the v2 band of water at atmospheric pressure. These measurements demonstrate the advantages of wide tunability and high resolution of the EC-QCL system. From direct absorption spectroscopy on nitric oxide a laser bandwidth of 20 MHz has been deduced and a sensitivity of 8.4 × 10-4 cm-1 Hz-1/2 was achieved. Wavelength modulation spectroscopy using current modulation enhances the sensitivity by a factor of 23 to 3.7× 10-5 cm-1 Hz-1/2. © 2009 American Institute of Physics.

Publication status:: Published

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APA Style

Hancock, G., van Helden, J., Peverall, R., Ritchie, G., & Walker, R. (2009). Direct and wavelength modulation spectroscopy using a cw external cavity quantum cascade laser. APPLIED PHYSICS LETTERS, 94(20), 201110–201110.

MLA Style

Hancock, G, et al. “Direct and Wavelength Modulation Spectroscopy Using a Cw External Cavity Quantum Cascade Laser.” APPLIED PHYSICS LETTERS, vol. 94, no. 20, 2009, pp. 201110–10.

Chicago Style

Hancock, G, J van Helden, R Peverall, G Ritchie, and R Walker. 2009. “Direct and Wavelength Modulation Spectroscopy Using a Cw External Cavity Quantum Cascade Laser.” APPLIED PHYSICS LETTERS 94 (20): 201110–10.
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Publisher copy:: 10.1063/1.3141521

Authors

+ Hancock, G More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Chemistry
Sub department:: Physical & Theoretical Chem
Role:: Author

+ van Helden, J More by this author

Role:: Author

+ Peverall, R More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Chemistry
Sub department:: Physical & Theoretical Chem
Role:: Author

+ Ritchie, G More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Chemistry
Sub department:: Physical & Theoretical Chem
Role:: Author

+ Walker, R More by this author

Role:: Author

Journal:: APPLIED PHYSICS LETTERS More from this journal
Volume:: 94
Issue:: 20
Pages:: 201110-201110
Publication date:: 2009-05-18
DOI:: 10.1063/1.3141521
ISSN:: 0003-6951

Language:: English
Keywords:: quantum cascade lasers

modulation spectroscopy
Pubs id:: pubs:41192
UUID:: uuid:0c1d20d5-66c3-4bf0-8c62-c179a0b2f77c
Local pid:: pubs:41192
Source identifiers:: 41192
Deposit date:: 2012-12-19
ARK identifier:: ark:/29072/ora_0c1d20d566c34bf08c62c179a0b2f77c

Terms of use

Copyright date:: 2009

Licence:: Terms and Conditions of Use for Oxford University Research Archive

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