Plasma mirrors for short pulse KrF lasers

Gilicze, Barnabás; Barna, A.; Kovács, Zsolt; Szatmàri, S.; Földeş, I

doi:10.1063/1.4960089

Cited by 13 publications

(17 citation statements)

References 21 publications

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“…The plasma mirror, PM technique has successfully been applied for the improvement of the temporal contrast [1][2][3][4][5][6]. A bottleneck is the damage of the hosting surface due to the concomitant ablation.…”

Section: Introductionmentioning

confidence: 99%

Time integrated transient reflectivity versus ablation characteristics of Borofloat, BK7, and B270 optical glasses ablated by 34 fs pulses

Andrásik¹,

Flender²,

Budai³

et al. 2020

Opt. Mater. Express

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Ablation and plasma mirror characteristics of Borofloat, BK7, and B270 glasses processed with 34 fs pulses of 800 nm central wavelength are compared in the 10 14-10 15 W/cm 2 intensity domain. With thresholds of 1.7-1.9 × 10 14 W/cm 2 , higher than those of fused silica, and depths saturating above 5×10 14 W/cm 2 , the three glasses behave similarly from the point of view of ablation. With reflectivity enhancements comparing favorably with that of fused silica, the glasses prove to be good plasma mirror hosts. With the steepest increase in time integrated transient reflectivity with intensity, Borofloat is the most promising candidate.

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Section: Introductionmentioning

confidence: 99%

Time integrated transient reflectivity versus ablation characteristics of Borofloat, BK7, and B270 optical glasses ablated by 34 fs pulses

Andrásik¹,

Flender²,

Budai³

et al. 2020

Opt. Mater. Express

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show abstract

“…For instance, a contrast improvement of 2-4 orders of magnitude can be achieved using a plasma mirror [5]-typically a glass substrate that reflects the focused beam. This technique, however, results in energy losses of 20-50% [5,17]. Additionally, as the reflected light pulses locally destroy the surface of the plasma mirror, a fresh spot has to be provided after each shot requiring a movable mirror holder and limiting the total number of shots.…”

Section: Introductionmentioning

confidence: 99%

Relativistic few-cycle pulses with high contrast from picosecond-pumped OPCPA

Kessel¹,

Leshchenko²,

Jahn³

et al. 2018

Optica

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For experiments in plasma, nuclear, and high-energy physics, there is a strong demand for laser pulses exhibiting relativistic intensity, few-cycle pulse duration, and a very high contrast. Here we present a picosecond-pumped optical parametric chirped pulse amplification (OPCPA) system delivering pulses at 10 Hz repetition rate with the following key parameters: a compressed pulse duration of less than 7 fs (close to the Fourier limit), a contrast of better than 10 11 starting from 1 ps before the main pulse, and a peak intensity of 6.9 × 10 19 W∕cm 2 achieved with an off-axis parabolic mirror (f/1.6). In a proof-of-principle experiment, these pulses were used to generate high harmonics from solid surfaces with photon energies exceeding 55 eV. These results underline the promising perspectives of the reported system for relativistic light-matter interaction experiments and attosecond science.

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“…above the plasma threshold) and saturates above 10 14 W/cm 2 remaining approximately constant up 10 16 W/cm 2 . The observed high reflectivity [9] which allows the direct applicability of the plasma mirror for KrF systems can be attributed mainly to the already good initial contrast. In the present case the intensity of the ASE pedestal of 15 ns duration on the target was less than 10 5 W/cm 2 .…”

Section: Experimental Arrangementmentioning

confidence: 90%

“…A high reflectivity, i.e. 70% efficiency was just recently obtained for laser pulses of 248 nm wavelength [9] which opens the possibility to its application in UV laser systems.…”

Section: Introductionmentioning

confidence: 93%

“…It was already shown by the early works of Fedosejevs et al [12] that even the ASE prepulse must be kept low in order to obtain high reflectivity. In the following the methods of optimizing the plasma mirror for the short pulse KrF laser is described in detail which resulted in nearly 70% reflectivity either for 600 fs or for 200 fs ultrashort pulse duration [9].…”

Section: Introductionmentioning

confidence: 99%

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Plasma Mirrors for Cleaning Laser Pulses from the Infrared to the Ultraviolet

Földeş

Gilicze

Kovács

et al. 2018

EPJ Web of Conferences

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Ultrashort laser pulses are generally preceded by prepulses which - in case of high main pulse intensities - may generate preplasmas on solid surfaces, thus making the initial conditions for the interactions ambiguous. Infrared laser systems applied successfully, with high efficiency self-induced plasma mirrors for improving the contrast of the beam. Short wavelength laser beams however have a larger critical density in the plasma, and due to their deeper penetration the absorption is higher, the reflectivity, and the corresponding plasma mirror efficiency is lower. We show herewith that with carefully planned boundary conditions plasma mirrors can reach up to 70% efficiency even for KrF laser radiation. Our observations can be qualitatively explained by the classical Drude model. The high reflectivity allows the use of plasma mirrors even after the final amplification or before the last amplifier. Different arrangement proposals for its integration to our high power KrF laser system are given as well.

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Plasma mirrors for short pulse KrF lasers

Cited by 13 publications

References 21 publications

Time integrated transient reflectivity versus ablation characteristics of Borofloat, BK7, and B270 optical glasses ablated by 34 fs pulses

Time integrated transient reflectivity versus ablation characteristics of Borofloat, BK7, and B270 optical glasses ablated by 34 fs pulses

Relativistic few-cycle pulses with high contrast from picosecond-pumped OPCPA

Plasma Mirrors for Cleaning Laser Pulses from the Infrared to the Ultraviolet

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