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Proceedings Paper

Photometer for large optics
Author(s): Jean-Christophe Poncetta; Andre Rouseel
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Paper Abstract

The Mégajoules Laser (LMJ ) is comprised of 240 separate beam lines that each produces about 20 kJ of 1 .053 microns light. Simply stated the architecture consists of 240 optical pulse generation system that each delivers a 10 nJ shaped and modulated pulse. Next, 240 preamplifier modules amplify the tailored pulses to 1 J, whereupon they are transported to the large amplifier chains where the laser energy is increased to the 20 kJ level. The preamplifier modules contain a regenerative amplifier ( regen ), a spatial beam shaping module and a fourpass amplifier. The specifications for the regen include a total gain of i0, an output energy of 10 mJ, operating at a 1 Hz rate, a square-pulse distortion < 2, a signal-to noise-ratio > i0, and a pulse-to-pulse output energy stability ofbetter than 3%.

Paper Details

Date Published: 8 December 1997
PDF: 7 pages
Proc. SPIE 3047, Solid State Lasers for Application to Inertial Confinement Fusion: Second Annual International Conference, (8 December 1997); doi: 10.1117/12.294269
Show Author Affiliations
Jean-Christophe Poncetta, Segime (France)
Andre Rouseel, Ctr. d'Etudes de Limeil-Valenton/CEA (France)


Published in SPIE Proceedings Vol. 3047:
Solid State Lasers for Application to Inertial Confinement Fusion: Second Annual International Conference
Michel L. Andre, Editor(s)

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