Diode-pumped chirped pulse amplification to the joule level

Hein, Joachim; Podleska, S.; Siebold, M.; Hellwing, Marco; Bödefeld, R.; Sauerbrey, R.; Ehrt, D.; Wintzer, Wolfram

doi:10.1007/s00340-004-1586-3

Cited by 63 publications

(25 citation statements)

References 20 publications

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“…Presently, a petawatt class laser facility such as POLARIS is expected to reach about 10 22 W/cm 2 at unprecedented repetition rates of ∼ 0.1 Hz [12]. The values of δ 2 obtained for such lasers (Tab.…”

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confidence: 99%

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On the observation of vacuum birefringence

Heinzl

Liesfeld

Amthor

et al. 2006

Optics Communications

291

334

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We suggest an experiment to observe vacuum birefringence induced by intense laser fields. A high-intensity laser pulse is focused to ultra-relativistic intensity and polarizes the vacuum which then acts like a birefringent medium. The latter is probed by a linearly polarized x-ray pulse. We calculate the resulting ellipticity signal within strong-field QED assuming Gaussian beams. The laser technology required for detecting the signal will be available within the next three years. The interactions of light and matter are described by quantum electrodynamics (QED), at present the bestestablished theory in physics. The QED Lagrangian couples photons to charged Dirac particles in a gauge invariant way. At photon energies small compared to the electron mass, ω ≪ m e , electrons (and positrons) will generically not be produced as real particles. Nevertheless, as already stated by Heisenberg and Euler, "...even in situations where the [photon] energy is not sufficient for matter production, its virtual possibility will result in a 'polarization of the vacuum' and hence in an alteration of Maxwell's equations" [1]. These authors were the first to explicitly derive the nonlinear terms induced by QED for small photon energies but arbitrary intensities (see also [2]).The most spectacular process resulting from these modifications presumably is pair production in a constant electric field. This is an absorptive process as photons disappear by disintegration into matter pairs. It can occur for field strengths larger than the critical one given by [3,4] In this electric field an electron gains an energy m e upon travelling a distance equal to its Compton wavelength, λ e = 1/m e . The associated intensity is I c = E 2 c ≃ 4.4 × 10 29 W/cm 2 such that both field strength and intensity * Electronic address: theinzl@plymouth.ac.uk

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confidence: 99%

“…We intend to utilize the high-repetition rate petawatt class laser system POLARIS which is currently under construction at the Jena high-intensity laser facility and which will be fully operational in 2007 [12]. POLARIS consists of a diode-pumped laser system based on chirped A high-intensity laser pulse is focused by an F/2.5 off-axis parabolic mirror.…”

mentioning

confidence: 99%

On the observation of vacuum birefringence

Heinzl

Liesfeld

Amthor

et al. 2006

Optics Communications

291

334

View full text Add to dashboard Cite

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“…Even in its current state, the measured maximum average power of 64 W and corresponding η o-o of 16% compare very favourably to other ongoing high-energy DPSSL projects. The respective values for average power and efficiency are 550 W and 7.6% for Mercury [9], 20 W and 5.7% for LUCIA [10], 213 W and 11.7% for HALNA [11], and 1.2 W and 6% for Polaris [12]. Once the new extraction scheme is in place, we expect to demonstrate η o-o greater than 25% at much higher coolant temperature, which will further improve the overall efficiency of the system.…”

Section: Resultsmentioning

confidence: 93%

DiPOLE - An Efficient and Scalable High Pulse Energy and High Average Power Cryogenic Gas Cooled Multi-Slab Amplifier Concept

Mason

Banerjee

Ertel

et al. 2013

Plasma and Fusion Research

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We present preliminary amplification results for DiPOLE, a prototype diode-pumped cryogenic gas cooled Yb:YAG amplifier. Amplification of ns-pulses at 1030 nm has demonstrated output energies of 10.1 J at 1 Hz in a 4-pass extraction geometry and 6.4 J at 10 Hz in a 3-pass setup, corresponding to optical-to-optical conversion efficiencies of 21% and 16%, respectively. Measured performance compares favourably to existing systems and confirms the viability of the concept for efficient generation of high energy pulses at multi-Hz repetition rate. Work is now underway to confirm the scalability of the concept with the design of a 100 J amplifier system. This along with advances in Ti:Sapphire amplifier technology opens the way to the development of a multi-Hz, PW-class laser facility at the Central Laser Facility. Knowledge gained from these developments will de-risk the technology necessary to build a sub-aperture beamlet for a laser driver suitable for fusion energy generation.

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“…[13,17]) to a pulse duration of 2.5 ns and furtheramplified by the second regenerative amplifier A2 to a pulse energy of 30 mJ. The amplification to the Joule-level is accomplished with a relay-imaging amplifier (A2.5: E out = 200 mJ) and two multipass nonimaging amplifiers (A3: E out = 800 mJ [18] , and A4: E out = 6.5 J). In all of these amplifiers Yb 3+ -doped fluoridephosphate glass [19][20][21][22] is used as the active material.…”

Section: Architecture Of the Polaris Lasermentioning

confidence: 99%

The all-diode-pumped laser system POLARIS – an experimentalist’s tool generating ultra-high contrast pulses with high energy

Hornung

Liebetrau²,

Seidel³

et al. 2014

High Pow Laser Sci Eng

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The development, the underlying technology and the current status of the fully diode-pumped solid-state laser system POLARIS is reviewed. Currently, the POLARIS system delivers 4 J energy, 144 fs long laser pulses with an ultra-high temporal contrast of 5×10 12 for the ASE, which is achieved using a so-called double chirped-pulse amplification scheme and cross-polarized wave generation pulse cleaning. By tightly focusing, the peak intensity exceeds 3.5 × 10 20 W cm −2 . These parameters predestine POLARIS as a scientific tool well suited for sophisticated experiments, as exemplified by presenting measurements of accelerated proton energies. Recently, an additional amplifier has been added to the laser chain. In the ramp-up phase, pulses from this amplifier are not yet compressed and have not yet reached the anticipated energy. Nevertheless, an output energy of 16.6 J has been achieved so far.

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Diode-pumped chirped pulse amplification to the joule level

Cited by 63 publications

References 20 publications

On the observation of vacuum birefringence

On the observation of vacuum birefringence

DiPOLE - An Efficient and Scalable High Pulse Energy and High Average Power Cryogenic Gas Cooled Multi-Slab Amplifier Concept

The all-diode-pumped laser system POLARIS – an experimentalist’s tool generating ultra-high contrast pulses with high energy

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