KrF laser system with corrected pulse front and compressed pulse duration

Flyer acceleration experiments are carried out using a KrF laser system with a pulse duration of 10–15 ns and an intensity of ∼1.0 × 1013 W/cm2. Three-layered targets (aluminum–polyimide–tantalum) are used. First, an average velocity of laser-driven tantalum flyers with a thickness of 4 and 8 μm is estimated. Then, in a collision of a flyer with a copper layer attached to a diamond plate, we measure a transit time of a shock wave in the diamond. The impact velocity is estimated based on the transit time and a numerical simulation. This numerical simulation also shows that the initial peak pressure caused by the impact of a 4-μm-thick flyer is kept at 11 Mbar for 12–13 μm in thickness. Finally, whether this thickness is enough for EOS measurements is discussed.

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Pulse front and pulse duration distortion in refractive optics, and its compensation

Optics Communications ◽

10.1016/0030-4018(88)90070-3 ◽

1988 ◽

Vol 69 (1) ◽

pp. 60-65 ◽

Cited By ~ 42

Author(s):

S. Szatmári ◽

G. Kühnle

Keyword(s):

Pulse Duration ◽

Pulse Front

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Influence of the Pulse Duration of an Er:YAG Laser System on the Ablation Threshold of Dental Enamel

Lasers in Medical Science ◽

10.1007/s101030200037 ◽

2002 ◽

Vol 17 (4) ◽

pp. 253-257 ◽

Cited By ~ 36

Author(s):

C. Apel ◽

R. Franzen ◽

J. Meister ◽

H. Sarrafzadegan ◽

S. Thelen ◽

...

Keyword(s):

Pulse Duration ◽

Ablation Threshold ◽

Er:Yag Laser ◽

Laser System ◽

Dental Enamel

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Active Stabilization of the Beam Pointing of a High- Power KrF Laser System

Metrology and Measurement Systems ◽

10.1515/mms-2015-0014 ◽

2015 ◽

Vol 22 (1) ◽

pp. 165-172 ◽

Cited By ~ 5

Author(s):

A. Barna ◽

I. B. Földes ◽

J. Bohus ◽

S. Szatmári

Keyword(s):

High Power ◽

Laser System ◽

Spot Size ◽

Electric Signal ◽

Simple Arrangement ◽

Krf Laser ◽

Active Stabilization ◽

Directional Change ◽

Position Sensitive Detectors

Abstract An active beam-pointing stabilization system has been developed for a high-power KrF laser system to eliminate the long-term drift of the directional change of the beam in order to have a stable focusing to a high intensity. The control of the beam direction was achieved by a motor-driven mirror activated by an electric signal obtained by monitoring the position of the focus of the output beam. Instead of large sized UV-sensitive position sensitive detectors a simple arrangement with scatter plates and photodiodes are used to measure the directionality of the beam. After the beam stabilization the long-term residual deviation of the laser shots is ~14 μrad, which is comparable to the shot-to-shot variation of the beam (~12 μrad). This deviation is small enough to keep the focal spot size in a micrometer range when tightly focusing the beam using off-axis parabolic mirrors.

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