18 January 1985 Four Channel Nd:Glass Laser System For Fusion Experiments
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Proceedings Volume 0473, Symposium Optika '84; (1985); doi: 10.1117/12.942457
Event: Symposium Optika '84, 1984, Budapest, Hungary
Abstract
The laser system at the Institute of Plasma Physics and Laser Microfusion is a four beam Nd-glass laser used for the study of laser plasma phenomena and is capable of generating 40 J pulses of 20-30 GW peak power in each arm. This paper presents an overview of the system. The Nd:YAG Q-switched oscillator with its optically triggered spark gap switchout produces pulses whose duration and energy are nominally 1,5-2 ns and 2 mJ, respectively. This pulse is amplified by two of rod preamlifiers and stages of rod amplifiers. The rod amplifier stages have apertures of 12 mm, 15 mm, 20 mm, 30 mm and 45 mm respectively. Spatial filters are placed between amplifier rod stages. After leaving the amplifier stage of 12 mm of the system the beam is spatially filtered to remove the high frequency ripples imposed on the beam by the hard aperture. The spatial filter also produces an image of hard (soft) aperture, which is subsequently re-imaged by a second spatial filter and so on up to a 9-th spatial filter which 'finally relays the hard (soft) aperture image onto the main focusing lens of the system.
© (1985) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. Denus, A. Dubik, B. Kaczmarcyk, J. Makowski, J. Owsik, Z. Patron, M. Szczurek, "Four Channel Nd:Glass Laser System For Fusion Experiments", Proc. SPIE 0473, Symposium Optika '84, (18 January 1985); doi: 10.1117/12.942457; https://doi.org/10.1117/12.942457
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KEYWORDS
Optical amplifiers

Spatial filters

Laser systems engineering

Neodymium glass lasers

Laser welding

Plasma physics

Nd:YAG lasers

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