High-Energy Pulse Stacking via Regenerative Pulse-Burst Amplification

Astrauskas, Ignas; Kaksis, Edgar; Flöry, Tobias; Andriukaitis, G.; Pugžlys, Audrius; Baltuška, Andrius; Ruppe, John; Chen, S.; Galvanauskas, Almantas; Balčiūnas, Tadas

doi:10.1364/assl.2016.am4a.5

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…The change in peak power within a burst can be problematic, but the seed can be pre-compensated to equalize the peak output power or the B-integral [14]. CPSA also works with varying pulse peak power within the burst [4,15]. However, there are also fast burst-to-burst fluctuations in how the pulse amplitude evolves within a burst.…”

Section: Resultsmentioning

confidence: 99%

Single-Shot Phase and Amplitude Fluctuations of Narrow-Line Pulse Bursts in Divided-Pulse Amplifier

Lin

Feng

Price

et al. 2019

IEEE Photon. Technol. Lett.

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We demonstrate single-shot temporal-based interferometric phase measurements for bursts of 35 pulses of 1ns duration in an Yb-doped fiber amplifier chain seeded by a 1063nm single-frequency diode laser and operating in a highly nonlinear and saturated regime. We determined a maximum intra-pulse phase distortion (B-integral) of 21.2 rad by mixing the burst with a reference. The difference in the B-integral between the first and last pulse in the burst was large, 12.8 rad, but can be compensated for. Moreover, burst-to-burst amplitude fluctuations (standard deviation, std) were below 6%, where phase fluctuations were ~0.6 rad (std) or less. Even if these fluctuations cannot be compensated for, they still allow for efficient coherent combination, which opens up for transform-limited or narrow-line high-energy divided-pulse amplification with single-frequency seeding.

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Section: Resultsmentioning

confidence: 99%

Single-Shot Phase and Amplitude Fluctuations of Narrow-Line Pulse Bursts in Divided-Pulse Amplifier

Lin

Feng

Price

et al. 2019

IEEE Photon. Technol. Lett.

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“…The generation of pulse bursts from individual seed pulses usually implements some kind of pulse splitting scheme such as birefringent materials [5] that require polarization‐insensitive optics or rather complicated piezo‐actuated pulse splitters [6]. Afterward, the obtained pulse burst is amplified up to the desired energy using standard tools such as regenerative amplifiers (RAs), where the complete pulse burst is injected into a cavity with an optical gain medium inside.…”

Section: Introductionmentioning

confidence: 99%

Control of the formation and amplification of pulse bursts in regenerative amplifiers

Deutschmann‐Olek

Schrom

Kugi

2022

IET Control Theory & Appl

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This paper presents control strategies to generate bursts of high‐intensity laser pulses with arbitrary envelope from regenerative amplifiers by suitably adjusting the energy of the injected seed pulses. To this end, existing and experimentally validated models are generalized to obtain a dynamical model of the pulse formation and amplification. The resulting model is applicable to standard regenerative amplifiers as well as amplifiers with a detuned cavity specifically designed for the generation of pulse bursts. Utilizing this mathematical model, an optimization‐based algorithm to obtain desired pulse bursts in steady state is presented. Since the quality of these feedforward solutions is limited due to parameter variations and model imprecisions, an adaptation scheme using iterative learning control methods is employed to track the desired burst envelope. Finally, the developed methods are combined with feedback strategies to allow for an operation in unstable regimes and the closed‐loop behaviour is illustrated by simulation scenarios.

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“…Burst-mode amplification is frequently perceived as more efficient compared to singlepulse amplification because the stored laser energy can be divided up among N pulses that offer an N-fold increase of the effective pulse duration in the amplifier and a √𝑁-times energy scaling. This advantage is explored in many variants of divided-pulse amplification [16][17][18][19] . However, no such advantage exists for pulse separations that are significantly shorter than the stretched pulse duration in conventional CPA.…”

mentioning

confidence: 99%

Programmable generation of terahertz bursts in chirped-pulse laser amplification

Stummer

Flöry

Krizsán

et al. 2020

Optica

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Amplified bursts of laser pulses are sought for various machining 1 , deposition 2 , spectroscopic 3 and strong-field applications 4 . Standard frequency-and time-domain techniques for pulse division 5-14 become inadequate when intraburst repetition rates reach the terahertz (THz) range as a consequence of inaccessible spectral resolution, requirement for interferometric stability, and collapse of the chirped pulse amplification (CPA) concept due to the loss of usable bandwidth needed for safe temporal stretching. Avoiding the burst amplification challenge and resorting to a lossy post-division of an isolated laser pulse after CPA leaves the limitations of frequency-and time-domain techniques unsolved. In this letter, we demonstrate an approach that successfully combines amplitude and phase shaping of THz bursts, formed using the Vernier effect, with active stabilization of spectral modes and efficient energy extraction from a CPA regenerative amplifier. As proof of concept, the amplified bursts of femtosecond near-infrared pulses are down-converted into tunable THz-frequency pulses via optical rectification.

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High-Energy Pulse Stacking via Regenerative Pulse-Burst Amplification

Cited by 4 publications

References 6 publications

Single-Shot Phase and Amplitude Fluctuations of Narrow-Line Pulse Bursts in Divided-Pulse Amplifier

Single-Shot Phase and Amplitude Fluctuations of Narrow-Line Pulse Bursts in Divided-Pulse Amplifier

Control of the formation and amplification of pulse bursts in regenerative amplifiers

Programmable generation of terahertz bursts in chirped-pulse laser amplification

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