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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 2 — Jan. 15, 2013
  • pp: 130–132

Fiber-coupled, 10 kHz simultaneous OH planar laser-induced fluorescence/particle-image velocimetry

Paul S. Hsu, Naibo Jiang, James R. Gord, and Sukesh Roy  »View Author Affiliations


Optics Letters, Vol. 38, Issue 2, pp. 130-132 (2013)
http://dx.doi.org/10.1364/OL.38.000130


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Abstract

Planar laser-induced fluorescence (PLIF) and particle-image velocimetry (PIV) techniques that employ free-standing optics face severe challenges when implemented in harsh environments associated with practical combustion facilities because of limited optical access and restrictions on operation of sensitive laser systems. To circumvent this problem, we have developed and implemented a fiber-coupled, high-speed ultraviolet (UV) PLIF/PIV system for measuring hydroxyl radical (OH) concentration and velocity in a realistic 4 MW combustion rig. This system permits delivery of high-power, 10 kHz, nanosecond-duration OH-PLIF excitation pulses (283 nm) and PIV pulses (532 nm) through a common 6 m long, 600 μm core, deep-UV-enhanced multimode fiber. Simultaneous OH-PLIF and PIV imaging at a data-acquisition rate of 10 kHz is demonstrated in turbulent premixed flames behind a bluff body. The effects of delivering high-repetition-rate, intense UV and visible beams through a long optical fiber are investigated, and potential system improvements are discussed.

© 2013 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(120.7250) Instrumentation, measurement, and metrology : Velocimetry
(160.2290) Materials : Fiber materials
(300.2530) Spectroscopy : Fluorescence, laser-induced

ToC Category:
Spectroscopy

History
Original Manuscript: November 20, 2012
Revised Manuscript: December 7, 2012
Manuscript Accepted: December 10, 2012
Published: January 8, 2013

Citation
Paul S. Hsu, Naibo Jiang, James R. Gord, and Sukesh Roy, "Fiber-coupled, 10 kHz simultaneous OH planar laser-induced fluorescence/particle-image velocimetry," Opt. Lett. 38, 130-132 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-2-130


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