Laser Pulses with Axially-Symmetric Polarization
Formation of Powerful Short Pulses with Axially-Symmetric Polarization in Solid-State and Gas Lasers for the Production of High-Energy Particles and Applications in Laser Technology
Tech Area / Field
- FUS-PLA/Plasma Physics/Fusion
- PHY-OPL/Optics and Lasers/Physics
3 Approved without Funding
VNIIEF, Russia, N. Novgorod reg., Sarov
- FIAN Lebedev, Russia, Moscow
- Universität Stuttgart / Institut für Strahlwerkzenge, Germany, Stuttgart\nLaser Zentrum Hannover e.v., Germany, Hannover\nUniversity of Electro-Communications / Institute for Laser Science, Japan, Tokyo\nTRUMPF Laser GmbH + Co. KG, Germany, Schramberg
Project summaryThe Project objective is to study a feasibility to produce a solid-state (neodymium) and gas (iodine) laser radiation in the form of high power short (10-8 –10-11 s) pulses with axially-symmetric (radial, azimuthal) polarization, as well as to carry out theoretical and experimental investigations of the noted radiation interaction with matter.
The problem of producing a pulsed radiation with axially-symmetric polarization in the solid-state and gas lasers and studying of this radiation interaction with matter is a highly interesting problem from the viewpoint of fundamental and applied science. To date mainly the continuous wave (cw) operation lasers have been used in the experiments on the formation and application of the radiation pulses with axially-symmetric polarization. At the present moment there is studied a possibility of an application of a pulsed radiation with axially-symmetric polarization to the laser processing of the materials.
The generation of high power (109-1013 W) short (nano- and subnanosecond) laser pulses with radial or azimuth polarization opens up new fields of use in the fundamental and applied investigations. This is connected, first of all, with the fact that when focusing a radially polarized laser beam one can essentially increase the radiation fraction with a longitudinal (along the beam axis) component of an electrical field as compared to the radiation with a linear or circular polarization. As a result one can provide high degree of the laser radiation resonant absorption in plasma, and, as a consequence, to notably increase laser radiation fraction which is transformed into the energy of the beams of high-energy superthermal electrons and ions in the laser plasma. On the basis of an application of the beams of high energy charged particles from the laser plasma, the fundamental lines of investigation in the experimental nuclear physics are being presently developed, as well as the applied investigations in the solution of the problems of controlled thermonuclear fusion, the methods of material precision processing, and the development of therapeutic and diagnostics methods in medicine. The application of pulsed radiation with axially-symmetric polarization may increase the energy and power of high-energy charged particle beams from laser plasma as compared to the up-to-date level, and open up new possibilities in the development of above-mentioned areas of physics and technology.
The work on the Project is to be carried out by a team of experienced scientists from VNIIEF and Lebedev Institute. High qualification of the Project participants is based on a previous experience in the research of high power solid-state and gas lasers, and laser interaction with matter, illustrated in a large number of scientific publications by the Project participants in the leading Russian and foreign scientific journals, which cover the topics of the proposed Project. The scope of the experimental base, computer resources and the available verified applied codes at Lebedev Institute and VNIIEF is quite sufficient for the realization of the Project goal.
The Project Manager, Dr. Vinogradskiy L.M. (Head of the Department) is one of the leading specialists in the design and development of the elementary basis of high power laser systems. Dr. Vinogradskiy L.M. is the head of a scientific team highly experienced in the experimental and theoretical research and development of high-power iodine laser systems. Dr. Yu.V. Senatsky (Head of Laboratory), the Project Sub-Manager at Lebedev Institute, is the leading specialist on pulsed solid-solid lasers. His scientific publications are devoted to the generation and amplification of Nd-laser short pulses, and the research of solid-state laser physics.
An interest to the Project has been expressed by the researchers from the laser laboratories of:
- Institute of Laser Science, University of Electro-communications, Tokyo, Japan;
- Optical Institute of the Technical University, Berlin, Germany;
- Laser Centrum of Hanover, Hanover, Germany.
The Project participants have contacted the administration and researchers of these laboratories, and during the work on the Project the collaboration will be performed in the form of consultations and discussion of the obtained results.
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