High Power Dynamic Polarization Control Using Plasma Photonics

Turnbull, D.; Michel, P.; Chapman, T.; Tubman, Eleanor; Pollock, B.; Chen, C. Y.; Goyon, C.; Ross, J. S.; Divol, L.; Woolsey, N. C.; Moody, J. D.

doi:10.1103/physrevlett.116.205001

Cited by 58 publications

(42 citation statements)

References 18 publications

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“…(1)- (4) and the analysis that generated them, stems from comparison to experimental observations of power transmission in cases where the pump and seed beams had linear polarizations that were either aligned 14 or had their polarizations components measured separately. 28,29 The close agreement with observations in cases where the ion wave response was linear confirmed the Vlasov model of the plasma in predicting a linear plasma response that is applicable in a wider range of situations. Still, there have been numerous observations of the amplification of beams by CBET in conditions where the plasma response was either inferred to be non-linear by comparison of seed amplification with linear models 10,11,18,[20][21][22] or directly demonstrated to be non-linear via the scaling of transmitted amplified seed power with incident seed power.…”

Section: Models Of Cbet For Designing Plasma Optic Devices and Their supporting

confidence: 68%

A plasma amplifier to combine multiple beams at NIF

et al. 2018

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Combining laser beams in a plasma is enabled by seeded stimulated Brillouin scattering which allows cross-beam energy transfer (CBET) to occur and re-distributes the energy between beams that cross with different incident angles and small differences in wavelength [Kirkwood et al. Phys. Plasmas 4, 1800 (1997)]. Indirect-drive implosions at the National Ignition Facility (NIF) [Haynam et al. Appl. Opt. 46, 3276–3303 (2007)] have controlled drive symmetry by using plasma amplifiers to transfer energy between beams [Kirkwood et al., Plasma Phys. Controlled Fusion 55, 103001 (2013); Lindl et al., Phys. Plasmas 21, 020501 (2014); and Hurricane et al. Nature 506, 343–348 (2014)]. In this work, we show that the existing models are well enough validated by experiments to allow a design of a plasma beam combiner that, once optimized, is expected to produce a pulse of light in a single beam with the energy greatly enhanced over existing sources. The scheme combines up to 61 NIF beams with 120 kJ of available energy into a single f/20 beam with a 1 ns pulse duration and a 351 nm wavelength by both resonant and off-resonance CBET. Initial experiments are also described that have already succeeded in producing a 4 kJ, 1 ns pulse in a single beam by combination of up to eight incident pump beams containing <1.1 kJ/beam, which are maintained near resonance for CBET in a plasma that is formed by 60 pre-heating beams [Kirkwood et al., Nat. Phys. 14, 80 (2018)].

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Section: Models Of Cbet For Designing Plasma Optic Devices and Their supporting

confidence: 68%

A plasma amplifier to combine multiple beams at NIF

et al. 2018

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“…Turnbull et al exploited this property previously to convert an initially elliptical polarization into a nearly ideal circular polarization [2]. Here, wavelength tuning capability allows us to validate other points along the real refractive index perturbation curve, as is also shown in Fig.…”

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confidence: 88%

“…There has been a recent surge of interest in using laserplasma optical systems to manipulate the basic properties of light waves [1][2][3][4]. Plasma-based photonic devices are attractive because they can be ultrafast, damageresistant, and easily tunable.…”

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confidence: 99%

“…The effect of a laser-plasma system on a second laser beam probing the system can be described by a complex refractive index perturbation that is a function of the wavelength shift between the interacting beams; the system can thus (anisotropically) modify both the phase and the amplitude of the probe and therefore act as a waveplate and/or a polarizer [1]. Several teams have now demonstrated polarization changes induced when using degenerate (same frequency) beams, which isolates the impact on phase [2,24]. In this Letter, we report the use of wavelength tuning to more fully map out the complete refractive index perturbation in the vicinity of the ion acoustic resonance.…”

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confidence: 99%

“…1) [1,23]. The ability to induce anisotropy via the relative orientation of the pump and probe polarizations can be exploited for precise manipulation of the probe's polarization [2].…”

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confidence: 99%

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