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

Quasi-continuous burst-mode laser for high-speed planar imaging

Mikhail N. Slipchenko, Joseph D. Miller, Sukesh Roy, James R. Gord, Stephen A. Danczyk, and Terrence R. Meyer
Opt. Lett. 37(8) 1346-1348 (2012)

Ultrahigh-frame-rate OH fluorescence imaging in turbulent flames using a burst-mode optical parametric oscillator

Joseph D. Miller, Mikhail Slipchenko, Terrence R. Meyer, Naibo Jiang, Walter R. Lempert, and James R. Gord
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Burst-mode OH/CH₂O planar laser-induced fluorescence imaging of the heat release zone in an unsteady flame

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Opt. Express 26(14) 18105-18114 (2018)

100  kHz, 100  ms, 400  J burst-mode laser with dual-wavelength diode-pumped amplifiers

Mikhail N. Slipchenko, Joseph D. Miller, Sukesh Roy, Terrence R. Meyer, Jason G. Mance, and James R. Gord
Opt. Lett. 39(16) 4735-4738 (2014)

4D spatiotemporal evolution of combustion intermediates in turbulent flames using burst-mode volumetric laser-induced fluorescence

Benjamin R. Halls, Naibo Jiang, Terrence R. Meyer, Sukesh Roy, Mikhail N. Slipchenko, and James R. Gord
Opt. Lett. 42(14) 2830-2833 (2017)