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

Slipchenko, Mikhail N.; Miller, Joseph D.; Roy, Sukesh; Meyer, Terrence R.; Mance, Jason; Gord, James R.

doi:10.1364/ol.39.004735

Cited by 75 publications

(23 citation statements)

References 15 publications

(28 reference statements)

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“…The laser architecture utilizes both diode-and flashlamp-pumped Nd:YAG amplifiers for amplification of a nearly transform-limited 100 ps oscillator. The compact design is similar to that of previous burst-mode lasers that used narrow-bandwidth ns oscillators but with nearly two-orders-of-magnitude reduction in pulse duration [15,16]. As such, this laser will have wide applicability in an array of nonlinear spectroscopic and imaging applications in high-speed turbulent and unsteady reacting and nonreacting flows.…”

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confidence: 89%

“…Burst-mode lasers achieve high pulse energy in combination with high-repetition-rate operation by grouping a series of closely spaced pulses into short bursts, thus enabling high pulse peak power and high repetition rate with low average system power. Several master-oscillator power-amplifier (MOPA) architectures and various active laser media have been used for producing bursts of fs, ps, and ns pulses, including Yb-doped fiber amplifiers [10,11], Yb: YAG thin-disk multipass amplifiers [12], multipass amplifiers based on a cryogenically cooled Yb 3 :CaF 2 crystal [13], multi-stage Nd:YLF amplifiers [14], and Nd:YAG multi-stage amplifiers [2,3,[15][16][17][18][19][20][21][22].…”

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confidence: 99%

“…Among ns burst-mode systems, Nd:YAG multi-stage burst-mode lasers are capable of producing long burst durations of 10-100 ms [15,16] with high pulse energies up to a few Joules [17]. Such laser systems have been successfully used for linear optical-diagnostic techniques such as planar laser-induced fluorescence (PLIF) [18][19][20], simultaneous particle-image velocimetry (PIV) and PLIF mixture-fraction imaging [21], and Rayleigh and Raman scattering [3,17,22].…”

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confidence: 99%

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100-ps-pulse-duration, 100-J burst-mode laser for kHz–MHz flow diagnostics

et al. 2014

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A high-speed, master-oscillator power-amplifier burst-mode laser with ∼100 ps pulse duration is demonstrated with output energy up to 110 J per burst at 1064 nm and second-harmonic conversion efficiency up to 67% in a KD*P crystal. The output energy is distributed across 100 to 10,000 sequential laser pulses, with 10 kHz to 1 MHz repetition rate, respectively, over 10 ms burst duration. The performance of the 100 ps burst-mode laser is evaluated and been found to compare favorably with that of a similar design that employs a conventional ∼8 ns pulse duration. The nearly transform-limited spectral bandwidth of 0.15 cm(-1) at 532 nm is ideal for a wide range of linear and nonlinear spectroscopic techniques, and the 100 picosecond pulse duration is optimal for fiber-coupled spectroscopic measurements in harsh reacting-flow environments.

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confidence: 89%

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confidence: 99%

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100-ps-pulse-duration, 100-J burst-mode laser for kHz–MHz flow diagnostics

et al. 2014

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“…The goal of this work is to elucidate some of the intrusive effects that repetitive laser pulsing can have on the LII signal and to investigate the conditions under which it may be possible to use this signal for high-speed planar imaging of the soot volume fraction in turbulent flames. This work is enabled by the development and application of burst-mode laser technology [35], which allows high-energy output for 100's and even 1000's of pulse sequences at multi-kHz repetition rates [36][37][38][39]. Traditional laser-based diagnostics with high temporal and spatial resolution are unable to achieve the repetition rates necessary to track the timeevolving fluid-flame interactions at high Reynolds numbers [40].…”

Section: Introductionmentioning

confidence: 99%

“…With a trade-off in pulse energy, these systems are ultimately scalable to megahertz repetition rates [35,41,46]. The low duty cycle operation of these systems allows high pumping rates, achieving high gain and high perpulse energies ranging from 100's of mJ [36,38,39,41] to >2 J [37,43]. As continuously pulsed diode-pumped solid-state laser systems have also seen significant improvements in repetition rate (10's of kHz) and pulse energy (10's of mJ/pulse) [47], it is now feasible to consider high-repetition rate, planar LII imaging with long record lengths using either burst-mode or continuously pulsed laser systems.…”

Section: Introductionmentioning

confidence: 99%

Effects of repetitive pulsing on multi-kHz planar laser-induced incandescence imaging in laminar and turbulent flames

et al. 2015

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Planar laser-induced incandescence (LII) imaging is reported at repetition rates up to 100 kHz using a burstmode laser system to enable studies of soot formation dynamics in highly turbulent flames. To quantify the accuracy and uncertainty of relative soot volume fraction measurements, the temporal evolution of the LII field in laminar and turbulent flames is examined at various laser operating conditions. Under high-speed repetitive probing, it is found that LII signals are sensitive to changes in soot physical characteristics when operating at high laser fluences within the soot vaporization regime. For these laser conditions, strong planar LII signals are observed at measurement rates up to 100 kHz but are primarily useful for qualitative tracking of soot structure dynamics. However, LII signals collected at lower fluences allow sequential planar measurements of the relative soot volume fraction with a sufficient signal-to-noise ratio at repetition rates of 10-50 kHz. Guidelines for identifying and avoiding the onset of repetitive probe effects in the LII signals are discussed, along with other potential sources of measurement error and uncertainty. RightsThis paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: https://www.osapublishing.org/ ol/abstract.cfm?uri=ol-40-9-2029&origin=search. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. Planar laser-induced incandescence (LII) imaging is reported at repetition rates up to 100 kHz using a burst-mode laser system to enable studies of soot formation dynamics in highly turbulent flames. To quantify the accuracy and uncertainty of relative soot volume fraction measurements, the temporal evolution of the LII field in laminar and turbulent flames is examined at various laser operating conditions. Under high-speed repetitive probing, it is found that LII signals are sensitive to changes in soot physical characteristics when operating at high laser fluences within the soot vaporization regime. For these laser conditions, strong planar LII signals are observed at measurement rates up to 100 kHz but are primarily useful for qualitative tracking of soot structure dynamics. However, LII signals collected at lower fluences allow sequential planar measurements of the relative soot volume fraction with a sufficient signal-to-noise ratio at repetition rates of 10-50 kHz. Guidelines for identifying and avoiding the onset of repetitive probe effects in the LII signals are discussed, along with other potential sources of measurement error and uncertainty.

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