On the feasibility of a fiber-based inertial fusion laser driver |
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| Authors: | C. Labaune D. Hulin A. Galvanauskas G.A. Mourou |
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| Affiliation: | 1. Institut Lasers et Plasmas, CEA, CNRS, Université Bordeaux1, Ecole Polytechnique 351 cours de la Libération, 33405 TALENCE cedex, France;2. Laboratoire d’Otique Appliquée, UMR 7639 ENSTA, Ecole Polytechnique, CNRS, 91761 Palaiseau, France;3. Center for Ultrafast Optical Sciences, 1122 EECS, 1301 Beal Avenue, Ann Arbor, MI 48109-2122, United States;1. Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk 630090, Russia;2. Functional Electronics Laboratory, Tomsk State University, Tomsk 634050, Russia;3. Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk 630090, Russia;4. Laboratory of Crystal Growth, Institute of Geology and Mineralogy, SB RAS, Novosibirsk 630090, Russia;5. BCCRD, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;6. University of Chinese Academy of Sciences, Beijing 100049, China;7. Australian Nuclear Science & Technology Organisation, Lucas Heights, NSW 2234, Australia;1. International Space University, Parc d’Innovation, 1 Rue Jean-Dominique Cassini, 67400 Illkirch-Graffenstaden, France;2. Initiative for Interstellar Studies, 27-29 South Lambeth Road, London SW8 1SZ, United Kingdom;1. Université de Lorraine, LMOPS-EA 4423, Metz, France;2. CentraleSupelec, LMOPS, Metz, France;3. University Saad Dahlab, LAFPC, BP270, 09000 Blida, Algeria;1. Tokuyama Corporation, 1-1, Harumi-cho, Shunan-shi, Yamaguchi 745-8648, Japan;2. IMR, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;3. Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan;4. Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, kitakyushu, Fukuoda 808-0196, Japan;5. NICHe, Tohoku University 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan |
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| Abstract: | ![]()
One critical issue for the realization of Inertial Fusion Energy (IFE) power plants is the driver efficiency. High driver efficiency will greatly relax the driver energy requested to produce a fusion gain, resulting in more compact and less costly facilities. Among lasers, systems based on guided wave such as diode pumped Yb:glass fiber-amplifiers with a demonstrated overall efficiency close to 70% as opposed to few percents for systems based on free propagation, offer some intriguing opportunities. Guided optics provides the enormous advantage to directly benefit from the telecommunication industry where components are made cheap, rugged, well tested, environmentally stable, with lifetimes measured in tens of years and compatible with massive manufacturing.In this paper, we are studying the possibility to design a laser driver solely based on guided wave optics. We call this concept FAN for Fiber Amplification Network. It represents a profound departure from already proposed laser drivers all based on free propagation optics. The system will use a large number of identical fibers to combines long (ns) and short (ps) pulses that are needed for the fast ignition scheme. Technical details are discussed relative to fiber type, pump, phasing, pulse shaping and timing as well as fiber distribution around the chamber. The proposed fiber driver provides maximum and independent control on the wavefront, pulse duration, pulse shape, timing, making possible reaching the highest gain. The massive manufacturing will be amenable to a cheaper facility with an easy upkeep. |
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