High energy CPA-free picosecond Yb:YAG amplifier

Loeser, Markus; Siebold, M.; Roeser, F.; Schramm, U.

doi:10.1364/assp.2012.am4a.16

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…A concave mirror (radius of curvature: 500 mm) was utilized to form a 800 mm long stable cavity with a mode-size diameter of 200 μm. In a second stage (booster) the ns-pulses were then amplified to about 50 mJ in an Yb:YAG 14-pass amplifier which is similar to the final amplifier in terms of the optical setup (detailed description given in [19]). The gain medium of the final multi-pass amplifier was pumped by a stack of 25 fast axis collimated diode-laser bars (Jenoptik Laserdiode GmbH) with a peak output power of 4 kW and a center wavelength of 940 nm.…”

Section: Introductionmentioning

confidence: 99%

High-energy, ceramic-disk Yb:LuAG laser amplifier

Siebold¹,

Loeser²,

Roeser³

et al. 2012

Opt. Express

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We report the first short-pulse amplification results to several hundred millijoule energies in ceramic Yb:LuAG. We have demonstrated ns-pulse output from a diode-pumped Yb:LuAG amplifier at a maximum energy of 580 mJ and a peak optical-to-optical efficiency of 28% at 550 mJ. In cavity dumped operation of a nanosecond oscillator we obtained 1 mJ at up to 100 Hz repetition rate. A gain bandwidth of 5.4 nm was achieved at room temperature by measuring the small-signal single-pass gain. Furthermore, we compared our results with Yb:YAG within the same amplifier system.

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Section: Introductionmentioning

confidence: 99%

High-energy, ceramic-disk Yb:LuAG laser amplifier

Siebold¹,

Loeser²,

Roeser³

et al. 2012

Opt. Express

Self Cite

View full text Add to dashboard Cite

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Efficient laser-driven proton acceleration from cylindrical and planar cryogenic hydrogen jets

Obst

Göde

Rehwald

et al. 2017

Sci Rep

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We report on recent experimental results deploying a continuous cryogenic hydrogen jet as a debris-free, renewable laser-driven source of pure proton beams generated at the 150 TW ultrashort pulse laser Draco. Efficient proton acceleration reaching cut-off energies of up to 20 MeV with particle numbers exceeding 109 particles per MeV per steradian is demonstrated, showing for the first time that the acceleration performance is comparable to solid foil targets with thicknesses in the micrometer range. Two different target geometries are presented and their proton beam deliverance characterized: cylindrical (∅ 5 μm) and planar (20 μm × 2 μm). In both cases typical Target Normal Sheath Acceleration emission patterns with exponential proton energy spectra are detected. Significantly higher proton numbers in laser-forward direction are observed when deploying the planar jet as compared to the cylindrical jet case. This is confirmed by two-dimensional Particle-in-Cell (2D3V PIC) simulations, which demonstrate that the planar jet proves favorable as its geometry leads to more optimized acceleration conditions.

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High energy CPA-free picosecond Yb:YAG amplifier

Cited by 2 publications

References 8 publications

High-energy, ceramic-disk Yb:LuAG laser amplifier

High-energy, ceramic-disk Yb:LuAG laser amplifier

Efficient laser-driven proton acceleration from cylindrical and planar cryogenic hydrogen jets

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