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Optics Letters

Optics Letters

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  • Vol. 30, Iss. 11 — Jun. 1, 2005
  • pp: 1321–1323

Diode-laser-based ultraviolet-absorption sensor for high-speed detection of the hydroxyl radical

Thomas N. Anderson, Robert P. Lucht, Terrence R. Meyer, Sukesh Roy, and James R. Gord  »View Author Affiliations


Optics Letters, Vol. 30, Issue 11, pp. 1321-1323 (2005)
http://dx.doi.org/10.1364/OL.30.001321


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Abstract

A new diode-laser-based UV-absorption sensor for high-speed detection of the hydroxyl radical (OH) is described. The sensor is based on sum-frequency generation of UV radiation at 313.5 nm by mixing the output of a 763-nm distributed-feedback diode laser with that of a 532-nm high-power, diode-pumped, frequency-doubled Nd:YVO4 laser in a beta-barium borate crystal. Approximately 25 µW of UV radiation is generated and used to probe rotational transitions in the A²Sigma+-X²Pi (v'=0, v"=0) electronic transition of OH. Single-sweep, single-pass measurements of temperature and OH concentration in a stoichiometric C2H4-air flame are demonstrated at rates up to 20 kHz.

© 2005 Optical Society of America

OCIS Codes
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(190.1900) Nonlinear optics : Diagnostic applications of nonlinear optics
(300.1030) Spectroscopy : Absorption
(300.6260) Spectroscopy : Spectroscopy, diode lasers
(300.6540) Spectroscopy : Spectroscopy, ultraviolet

Citation
Thomas N. Anderson, Robert P. Lucht, Terrence R. Meyer, Sukesh Roy, and James R. Gord, "Diode-laser-based ultraviolet-absorption sensor for high-speed detection of the hydroxyl radical," Opt. Lett. 30, 1321-1323 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-11-1321

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