Third-generation megahertz-rate pulse burst laser system

Thurow, Brian S.; Satija, Aman; Lynch, Kyle P.

doi:10.1364/ao.48.002086

Cited by 58 publications

(22 citation statements)

References 8 publications

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“…To overcome the challenges associated with conventional high-average-power continuously pulsed DPSS lasers, it is possible to employ burst-mode laser technology in which the pulse sequence can reach energies of 100's of mJ per individual pulse up to MHz rates, while maintaining low average power [8][9][10][11][12]. This technology has been demonstrated for high-speed measurements of temperature [13]; mixture fraction [14]; PLIF of OH [10,15], NO [12,16,17], CH [18][19][20], and CH 2 O [21,22]; and Raman line imaging of O 2 , N 2 , CH 4 , and H 2 [23], with measurements ranging from 1 kHz to 1 MHz.…”

Section: Introductionmentioning

confidence: 99%

All-diode-pumped quasi-continuous burst-mode laser for extended high-speed planar imaging

Slipchenko¹,

Miller²,

Roy³

et al. 2013

Opt. Express

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An all-diode-pumped, multistage Nd:YAG amplifier is investigated as a means of extending the duration of high-power, burst-mode laser pulse sequences to an unprecedented 30 ms or more. The laser generates 120 mJ per pulse at 1064.3 nm with a repetition rate of 10 kHz, which is sufficient for a wide range of planar laser diagnostics based on fluorescence, Raman scattering, and Rayleigh scattering, among others. The utility of the technique is evaluated for image sequences of formaldehyde fluorescence in a lifted methane-air diffusion flame. The advantages and limitations of diode pumping are discussed, along with long-pulse diode-bar performance characteristics to guide future designs. Keywordsfluorescence, laser diagnostics, methane, Q switched lasers, diode-pumping, future designs, image sequence, laser pulse sequences, long pulse, methane-air diffusion flames, performance characteristics, planar imaging Disciplines Mechanical Engineering CommentsThis article is from Optics Express 21 (2013) Abstract: An all-diode-pumped, multistage Nd:YAG amplifier is investigated as a means of extending the duration of high-power, burstmode laser pulse sequences to an unprecedented 30 ms or more. The laser generates 120 mJ per pulse at 1064.3 nm with a repetition rate of 10 kHz, which is sufficient for a wide range of planar laser diagnostics based on fluorescence, Raman scattering, and Rayleigh scattering, among others. The utility of the technique is evaluated for image sequences of formaldehyde fluorescence in a lifted methane-air diffusion flame. The advantages and limitations of diode pumping are discussed, along with long-pulse diode-bar performance characteristics to guide future designs.

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Section: Introductionmentioning

confidence: 99%

All-diode-pumped quasi-continuous burst-mode laser for extended high-speed planar imaging

Slipchenko¹,

Miller²,

Roy³

et al. 2013

Opt. Express

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“…Thus, these techniques are somewhat prohibited by the low pulse energies of commercially available DPSS lasers. Similarly, many important combustion radicals such as CH, O, H, or NO cannot be imaged using PLIF because the UV laser energy obtained using commercial systems is too low.As an alternative to a continuous duty cycle, previous authors have demonstrated the ability to generate a limited number of higher energy pulses at high repetition rates (e.g., [4][5][6][7][8][9]). Perhaps the best-known examples of these types of laser systems are pulse-burst Nd:YAG systems that can produce a series of sequential pulses at repetition rates as high as 1 MHz [10] and pulse energies exceeding hundreds of millijoules at kilohertz rates (e.g., 11-17]).…”

mentioning

confidence: 99%

“…As an alternative to a continuous duty cycle, previous authors have demonstrated the ability to generate a limited number of higher energy pulses at high repetition rates (e.g., [4][5][6][7][8][9]). Perhaps the best-known examples of these types of laser systems are pulse-burst Nd:YAG systems that can produce a series of sequential pulses at repetition rates as high as 1 MHz [10] and pulse energies exceeding hundreds of millijoules at kilohertz rates (e.g., [11][12][13][14][15][16][17]).…”

mentioning

confidence: 99%

Ultrahigh laser pulse energy and power generation at 10 kHz

et al. 2012

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This Letter presents results from a new master-oscillator, power-amplifier pulse-burst laser system demonstrating ultrahigh pulse energies greater than 2.0 J/pulse at 1064 nm with interpulse separations of 100 μs (10 kHz) for burst durations of 100 pulses. Each pulse generates peak powers exceeding 130 MW and an average power of approximately 20 kW is generated over a 100-pulse-burst. Pulse energies decrease by less than 10% over a 100 sequential pulses, demonstrating negligible "droop" over long-duration pulse trains. Second-harmonic generation of 532 nm with conversion efficiency greater than 50% is demonstrated for 100-pulse-burst durations.

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“…The temporal resolution was achieved by sampling with pulses of our Satsuma laser system (Amplitude Systèmes, Pessac, France) in delay steps of 100 ps, while the transmission at each point was determined as an average value. The curve was fitted using Equation (2). The 10%-90% rise time was determined to be 7.4 ns.…”

Section: Methodsmentioning

confidence: 99%

“…Among these are, for example, the detection of fast processes in combustion diagnostics with methods like particle image velocimetry (PIV), planar laser-induced fluorescence (PLIF) analysis, planar Rayleigh scattering or planar Doppler velocimetry (PDV) [1][2][3][4]. Furthermore, such pulse bursts may be applied in laser ablation [5,6] or in photoinjectors, which are used to create electron pulses in conventional particle accelerators [7].…”

Section: Introductionmentioning

confidence: 99%

Temporal Shaping of High Peak Power Pulse Trains from a Burst-Mode Laser System

et al. 2015

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It has been shown in the past that pulsed laser systems operating in the so-called "burst mode" are a beneficial approach to generate high peak power laser pulses at high repetition rates suitable for various applications. So far, most high-energy burst-mode laser systems put great effort into generating a homogeneous energy distribution across the burst duration, e.g., by shaping the pump pulse. In this work, we present a new shaping technique, which is able to produce arbitrary energy distributions within the burst by pre-shaping the seed pulse burst with a Pockels cell. Furthermore, this technique allows for the precompensation of any static modulations across the burst, which may be introduced during the subsequent amplification process. Therefore, a pulse burst with a uniform energy distribution can also be generated. The method is tested with an ultra-short pulse burst mode laser amplifier system producing bursts of a 1 ms duration with a pulse repetition rate of 1 MHz and a maximum output power of 800 W during the burst. Furthermore, a method to predict the influence of the amplifier on a non-uniformly shaped burst is presented and successfully tested to produce a pre-defined pulse shape after amplification.

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Third-generation megahertz-rate pulse burst laser system

Cited by 58 publications

References 8 publications

All-diode-pumped quasi-continuous burst-mode laser for extended high-speed planar imaging

All-diode-pumped quasi-continuous burst-mode laser for extended high-speed planar imaging

Ultrahigh laser pulse energy and power generation at 10 kHz

Temporal Shaping of High Peak Power Pulse Trains from a Burst-Mode Laser System

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