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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 4 — Feb. 15, 2014
  • pp: 739–742

100  kHz thousand-frame burst-mode planar imaging in turbulent flames

James B. Michael, Prabhakar Venkateswaran, Joseph D. Miller, Mikhail N. Slipchenko, James R. Gord, Sukesh Roy, and Terrence R. Meyer  »View Author Affiliations


Optics Letters, Vol. 39, Issue 4, pp. 739-742 (2014)
http://dx.doi.org/10.1364/OL.39.000739


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Abstract

High-repetition-rate, burst-mode lasers can achieve higher energies per pulse compared with continuously pulsed systems, but the relatively few number of laser pulses in each burst has limited the temporal dynamic range of measurements in unsteady flames. A fivefold increase in the range of timescales that can be resolved by burst-mode laser-based imaging systems is reported in this work by extending a hybrid diode- and flashlamp-pumped Nd:YAG-based amplifier system to nearly 1000 pulses at 100 kHz during a 10 ms burst. This enables an unprecedented burst-mode temporal dynamic range to capture turbulent fluctuations from 0.1 to 50 kHz in flames of practical interest. High pulse intensity enables efficient conversion to the ultraviolet for planar laser-induced fluorescence imaging of nascent formaldehyde and other potential flame radicals.

© 2014 Optical Society of America

OCIS Codes
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(300.2530) Spectroscopy : Fluorescence, laser-induced
(140.3538) Lasers and laser optics : Lasers, pulsed

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: October 25, 2013
Revised Manuscript: December 17, 2013
Manuscript Accepted: December 23, 2013
Published: February 3, 2014

Citation
James B. Michael, Prabhakar Venkateswaran, Joseph D. Miller, Mikhail N. Slipchenko, James R. Gord, Sukesh Roy, and Terrence R. Meyer, "100  kHz thousand-frame burst-mode planar imaging in turbulent flames," Opt. Lett. 39, 739-742 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-4-739


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