Fiber lasers integration for LMJ

Jolly, Alain; Gleyze, Jean-François; Penninckx, D.; Beck, N.; Videau, L.; Coïc, Hervé

doi:10.1016/j.crhy.2006.01.017

Cited by 16 publications

(12 citation statements)

References 10 publications

(12 reference statements)

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“…Due to the need to suppress the TSBS to protect the large aperture optics and for uniformity of the focal spot, spectrum broadened technology was used in the high power laser systems, such as the NIF, OMEGA, LMJ and SG series [1-5, 9-11, 24-29] . However, after spectral broadening, the discrepancy of the transmission rate of the spectral phase or amplitude leads to modulation of the time waveform, which is an FM-to-AM effect [22,[45][46][47][48][49][50][51][52] .…”

Section: Fm-to-am Effect Suppression Technologymentioning

confidence: 99%

Progress of the injection laser system of SG-II

Fan

Jiang

Wang

et al. 2018

High Pow Laser Sci Eng

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A high power laser system was used to drive the ignition of inertial confinement fusion (ICF), of which the high energy, the uniform focal spot, the accurate laser waveform, and the synchronization between the laser beams are key parameters. To accomplish this, global laser characteristics control should be assured, which was the main purpose of the injection laser system. In this paper, the key technological progress involved in the improvement of the performance of the injection laser of SG-II is reported, including frequency domain control, time domain control, near-field spatial shaping, pre-amplifier technology, and the optical parametric chirped pulse amplification pump source.

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Section: Fm-to-am Effect Suppression Technologymentioning

confidence: 99%

Progress of the injection laser system of SG-II

Fan

Jiang

Wang

et al. 2018

High Pow Laser Sci Eng

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“…Based upon the nature of the transverse SBS process, these lobes do not interact constructively with each other (as long as the frequency spacing exceeds the reciprocal of the SBS decay time). This approach (known as SBS suppression or SBSS) has been used at a variety of large ICF lasers successfully [9][10][11][12][13][14][15][16][17][18][19]. These sidebands are easily within 1 nm bandwidth, lying within both the gain bandwidth of the Nd:Phoshate glass amplifying medium and the acceptance bandwidth of the frequency doubling and tripling crystals used for the target interactions in ICF systems.…”

Section: Transverse Sbs and Associated Operational Risksmentioning

confidence: 99%

Injection of a Phase Modulated Source into the Z-Beamlet Laser for Increased Energy Extraction.

Rambo¹,

Armstrong²,

Schwarz³

et al. 2014

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The Z-Beamlet laser has been operating at Sandia National Laboratories since 2001 to provide a source of laser-generated x-rays for radiography of events on the Z-Accelerator. Changes in desired operational scope have necessitated the increase in pulse duration and energy available from the laser system. This is enabled via the addition of a phase modulated seed laser as an alternative front-end. The practical aspects of deployment are discussed here.

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“…In solid state laser drivers, it is still an important issue to output smooth waveform, as waveform is the basis of safe amplification. Furthermore, amplitude modulation (AM) can destroy power balance, prevent ignition of target and amplify instabilities of the plasma [9][10][11][12] . A purely frequencymodulated (FM) beam exhibits no amplitude modulation.…”

Section: Introductionmentioning

confidence: 99%

Research of beam smoothing technology on the technical integration line

Zhang

et al. 2013

SPIE Proceedings

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This paper is focused on the research of SSD and CPP carried out on TIL. A bulk phase modulator with 9.2-GHz modulation frequency is adopted in SSD. The output spectrum of the phase modulator is stable and the residual amplitude modulation is small. FM-to-AM effect caused by free-space propagation after using smoothing by spectral dispersion is theoretically and experimentally studied. Results indicate inserting a dispersion grating in places with larger beam aperture alleviates the FM-to-AM effect, suggesting minimizing free-space propagation and adopting image relay. Experiments indicate when the number of color cycles (N c ) adopts 1, imposing of SSD with 4.26 times diffraction limit (TDL) did not lead to pinhole closure in the spatial filters of the preamplifier with 20 TDL and main amplifier with 26 TDL. Experimental results also indicate SSD didn't influence the load capacity of the laser facility. The contrast of the 440-μm diameter focal spot with 95% energy included using SSD and CPP drops to 0.47, comparing to 1.71 not using SSD and CPP. When the pulse width of the third harmonic wave is 1 ns and the energy is 1115 J, no damage is found in CPP and other final optics. The experiments solves some key technical problems using SSD and CPP on high-power laser facilities, and provides a flexible platform for the laser-plasma interaction experiments.

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Fiber lasers integration for LMJ

Cited by 16 publications

References 10 publications

Progress of the injection laser system of SG-II

Progress of the injection laser system of SG-II

Injection of a Phase Modulated Source into the Z-Beamlet Laser for Increased Energy Extraction.

Research of beam smoothing technology on the technical integration line

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