Focusing system of multiterawatt laser facility (PROGRESS-P)

Victor N. Chernov; Vladimir G. Borodin; Alexander V. Charukchev; Vladimir A. Malinov; Vaycheslav M. Migel; Nikolai V. Nikitin; I. G. Rozivika

doi:10.1117/12.334801

30 December 1998 Focusing system of multiterawatt laser facility (PROGRESS-P)

Victor N. Chernov, Vladimir G. Borodin, Alexander V. Charukchev, Vladimir A. Malinov, Vaycheslav M. Migel, Nikolai V. Nikitin, I. G. Rozivika

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Proceedings Volume 3683, Laser Optics '98: Superstrong Laser Fields and Applications; (1998) https://doi.org/10.1117/12.334801
Event: Laser Optics '98, 1998, St. Petersburg, Russian Federation

Abstract

Focusing of multiterawatt laser beams is of particular importance for super strong field experiments. The parameters of focusing system of 30-TW Nd: glass laser facility PROGRESS-P with chirped pulse amplification and result of experimental investigations of laser beam propagation through this system are presented. Near diffraction-limited beam quality is obtained at output laser amplifier chain by use of the low-thermal phosphate Nd:glass and high quality optical elements. Output 180 mm beam is compressed to 1.5 ps using two holographic gratings with dimensions 420 X 210 mm, injected in target chamber through the LiF-window with low nonlinear refractive index coefficient and focused to targets by means developed f/1.1 on-axis parabolic mirror with focal length of 200 mm. Over 50 percent energy is obtained in 6-7 micrometers focal spot in target chamber for low power beam. Determination of the focal spot dimensions for 10 TW beam from x-ray plasma image show that microspot diameter not exceeds 7 micrometers .

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Victor N. Chernov, Vladimir G. Borodin, Alexander V. Charukchev, Vladimir A. Malinov, Vaycheslav M. Migel, Nikolai V. Nikitin, and I. G. Rozivika "Focusing system of multiterawatt laser facility (PROGRESS-P)", Proc. SPIE 3683, Laser Optics '98: Superstrong Laser Fields and Applications, (30 December 1998); https://doi.org/10.1117/12.334801

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KEYWORDS

Mirrors

Optical amplifiers

Laser beam propagation

Picosecond phenomena

Plasma

Pulsed laser operation

X-ray imaging

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