Generation of relativistic intensity pulses at a kilohertz repetition rate

Albert, O.; Wang, Hao Yu; Liu, D.; Chang, Zenghu; Mourou, G.

doi:10.1364/ol.25.001125

Cited by 82 publications

(41 citation statements)

References 11 publications

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“…Tabletop multi-terawatt laser systems with a pulse duration of only a few tens of femtoseconds are now available. 5,6 However, not all high-power phenomena can benefit from an increase in peak power if the pulse duration becomes too short. Here we report results of systematic experimental studies on how the laser pulse duration influences the formation of relativistic channels.…”

Section: Introductionmentioning

confidence: 99%

Influence of laser pulse duration on relativistic channels

et al. 2002

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A high-power ͑10 TW͒ laser is employed to generate relativistic channels in an underdense plasma. The lengths of the channels are measured by imaging the Thomson-scattered light, and the gas densities are determined through the forward Raman scattered light. The laser-pulse parameters are varied and their impact on the channel formation is studied. It is found that increasing the laser pulse duration in many cases produces longer channels, even as this implies reducing the laser peak power. A theoretical discussion is presented, proposing an explanation of the experimental results.

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Section: Introductionmentioning

confidence: 99%

Influence of laser pulse duration on relativistic channels

et al. 2002

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“…The shape of the deformable mirror is generally determined in a closed loop where either a direct measurement of the wavefront is performed 18 or some nonlinear optical signal 19,20 is used as feedback in an iterative algorithm. The objective of adaptive optics has largely been optimization of the laser focal shape to a near diffraction-limited spot, thus producing the highest possible intensity.…”

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confidence: 99%

Coherent control of plasma dynamics

Hou

Lebailly

et al. 2015

Nat Commun

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Coherent control of a system involves steering an interaction to a final coherent state by controlling the phase of an applied field. Plasmas support coherent wave structures that can be generated by intense laser fields. Here, we demonstrate the coherent control of plasma dynamics in a laser wakefield electron acceleration experiment. A genetic algorithm is implemented using a deformable mirror with the electron beam signal as feedback, which allows a heuristic search for the optimal wavefront under laser-plasma conditions that is not known a priori. We are able to improve both the electron beam charge and angular distribution by an order of magnitude. These improvements do not simply correlate with having the 'best' focal spot, as the highest quality vacuum focal spot produces a greatly inferior electron beam, but instead correspond to the particular laser phase front that steers the plasma wave to a final state with optimal accelerating fields.

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“…3). The laser pulse used for these calculations (E laser , B laser linear polarization, 800 nm central wavelength, and 20 fs full width at half maximum Gaussian temporal profile) is comparable to current high field experiments (Albert et al, 2000). Two different spatial modes are considered: a plane wave and a f/# 1.5 TEM 00 nonparaxial laser focus calculated to a field accuracy of 0.5%, i.e., third order non-paraxial terms.…”

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confidence: 99%