A compact double-pass Raman backscattering amplifier/compressor

Ren, Jun; Li, S.; Morozov, A.; Suckewer, S.; Yampolsky, Nikolai; Malkin, V. M.; Fisch, Nathaniel J.

doi:10.1063/1.2844352

Cited by 76 publications

(58 citation statements)

References 23 publications

(27 reference statements)

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“…Thus, we identify a pump intensity window for favorable amplification, and show that the recent experimental data apparently falls within this intensity window. These deductions follow from previously published results [13,14] as well as new experiments which compare the "forward chirp" with the "reverse chirp".…”

Section: Introductionsupporting

confidence: 70%

“…3) and new scaling (Fig. 4) also support both scenarios, namely, either the achievement of the nonlinear stage or the influence of detuning [13,14]. The scaling in Fig.…”

Section: Comparison Of Experimental Data With Bra Theorymentioning

confidence: 99%

“…1. We focus here on just those features of the experiment which will be analyzed later in the paper; further details of the experiment and the full experimental results can be found in [13,14]. Note that both the seed pulse and the pump pulse are generated by the same femtosecond Ti:Sapphire laser.…”

Section: Experimental Set Upmentioning

confidence: 99%

“…While the various factors mentioned above can all limit performance, the recent observa-3 tions [14] are now comprehensive enough to constrain the possibilities. We show here that these observations exhibit an interplay between the pump chirp, the plasma density gradient, and the nonlinearity of the BRA interaction.…”

Section: Introductionmentioning

confidence: 99%

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Demonstration of Detuning and Wavebreaking Effects on Raman Amplification Effciency in Plasma

Yampolsky

Fisch

Malkin

et al. 2008

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A plasma-based resonant backward Raman amplifier/compressor for high power amplification of short laser pulses might, under ideal conditions, convert as much as 90% of the pump energy to the seed pulse. While the theoretical highest possible efficiency of this scheme has not yet been achieved, larger efficiencies than ever before obtained experimentally (6.4%) are now being reported, and these efficiencies are accompanied by strong pulse compression. Based on these recent extensive experiments, it is now possible to deduce that the experimentally realized efficiency of the amplifier is likely constrained by two factors, namely the pump chirp and the plasma wavebreaking, and that these experimental observations may likely involve favorable compensation between the chirp of the laser and the density variation of the mediating plasma. Several methods for further improvement of the amplifier efficiency in current experiments are suggested.

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Section: Introductionsupporting

confidence: 70%

“…3) and new scaling (Fig. 4) also support both scenarios, namely, either the achievement of the nonlinear stage or the influence of detuning [13,14]. The scaling in Fig.…”

Section: Comparison Of Experimental Data With Bra Theorymentioning

confidence: 99%

Section: Experimental Set Upmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Demonstration of Detuning and Wavebreaking Effects on Raman Amplification Effciency in Plasma

Yampolsky

Fisch

Malkin

et al. 2008

Self Cite

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show abstract

“…It may also be possible to use optical parametric chirped pulse amplification to generate intense tune-able seed pulses, at the cost of increased complexity and timing issues. Even in the most successful experiment yet 18,19 , the 880 nm wavelength seed pulse only had a 1 T 1 ffiffiffiffiffiffiffiffiffiffi ω 0 ω p p ' 0:3. The measured plasma amplifier energy efficiency was 6.4%.…”

Section: Resultsmentioning

confidence: 99%

Advantages to a diverging Raman amplifier

Sadler¹,

Silva²,

Fonseca³

et al. 2018

Commun Phys

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The plasma Raman instability can efficiently compress a nanosecond long high-power laser pulse to sub-picosecond duration. Although, many authors envisaged a converging beam geometry for Raman amplification, here we propose the exact opposite geometry; the amplification should start at the intense focus of the seed. We generalise the coupled laser envelope equations to include this non-collimated case. The new geometry completely eradicates the usual trailing secondary peaks of the output pulse, which typically lower the efficiency by half. It also reduces, by orders of magnitude, the initial seed pulse energy required for efficient operation. As in the collimated case, the evolution is self similar, although the temporal pulse envelope is different. A two-dimensional particle-in-cell simulation demonstrates efficient amplification of a diverging seed with only 0.3 mJ energy. The pulse has no secondary peaks and almost constant intensity as it amplifies and diverges.

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Toward Ultraintense Compact RBS Pump for Recombination 3.4 nm Laser via OFI

Suckewer

Ren

et al. 2009

Springer Proceedings in Physics

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Abstract. In our presentation we overview progress we made in developing a new ultrashort and ultraintensive laser system based on Raman backscattering (RBS) amplifier /compressor from time of 10 th XRL Conference in Berlin to present time of 11 th XRL Conference in Belfast. One of the main objectives of RBS laser system development is to use it for pumping of recombination X-ray laser in transition to ground state of CVI ions at 3.4 nm. Using elaborate computer code the processes of Optical Field Ionization, electron energy distribution, and recombination were calculated. It was shown that in very earlier stage of recombination, when electron energy distribution is strongly non-Maxwellian, high gain in transition from the first excited level n=2 to ground level m=1 can be generated. Adding large amount of hydrogen gas into initial gas containing carbon atoms (e.g. methane, CH 4 ) the calculated gain has reached values up to 150 -200 cm -2 Taking into account this very encouraging result, we have proceed with arrangement of experimental setup. We will present the observation of plasma channels and measurements of electron density distribution required for generation of gain at 3.4 nm.

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A compact double-pass Raman backscattering amplifier/compressor

Cited by 76 publications

References 23 publications

Demonstration of Detuning and Wavebreaking Effects on Raman Amplification Effciency in Plasma

Demonstration of Detuning and Wavebreaking Effects on Raman Amplification Effciency in Plasma

Advantages to a diverging Raman amplifier

Toward Ultraintense Compact RBS Pump for Recombination 3.4 nm Laser via OFI

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