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Development of large aperture elements for active and adaptive optics
Kmetík, Viliam ; Nemcová, S. ; Jiran, L. ; Stranakova, E. ; Inneman, A.
Large-aperture elements for laser active and adaptive optics are investigated in collaboration within IOP AcSci CR, FEng CTU and 5M. A bimorph deformable mirror for high-power lasers based on a lightweight structure with a composite core is currently in development. In order to realize a sufficiently large working aperture we are using new technologies for production of core, bimorph actuator and DM reflector. Detailed simulation of components and structure is validated by measurement and testing. A research of DM actuation and response of a complicated mirror structure needed for an accurate control of a deformation is performed. Testing of samples and subscale measurements are currently performed, measurement of a complete structureis in preparation
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SWIR diagnostics with silicon CCD a CMOS elements for TW iodine fotodissociation laser PALS
Kmetík, Viliam
Mature silicon CCD and CMOS technologies provide right diagnostics of laser beam intensity and phase in visible and near infrared region. In case of SWIR lasers, particularly iodine lasers with working wavelength 1315 nm, other technologies with smaller resolution, dynamics a reliability but considerably higher price are currently used. Experimentally was shown, that suitable silicon CCD a CMOS elements are even contrary to very low sensitivity at 1,3 micron, capable reliably detect this radiation and are suitable for visualization and measurement of SWIR laser beams. Fundamental properties of detectors and their limits were studied.. Resolution of investigated detectors was few times bigger than resolution of available SWIR detectors. Selected CCD a CMOS elements were modified for measurement of laser beam at wavelength 1,3 micron with high resolution. These elements were used for beam measurement of iodine fotodissotiation laser PALS at 1315 nm with resolution of 1390x1040 points.
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Laserlab Europe - The Integrated Initiative of European Laser Laboratories
Kmetík, Viliam ; Bachárová, L.
PALS is a member of the LASERLAB Europe consortium from 2004, as one of 17 original laser laboratories from 9 EU countries. LASERLAB EU is from beginning focused on cooperation of excellent laser research facilities by support of science via ERA - European Research Activities. In 6-th Framework Programme of EU, LASERLAB successfully fulfilled all goals and continuing project is included in 7-th Framework Programme. Currently LASERLAB EU II includes 26 laser infrastructures, 13 subcontractors a 6 associates from 19 EU countries including International Laser Center in Bratislava. ILC participates on the project by establishing of a biofotonic infrastructure and is responsible for education of users. Primary goal of LASERLAB Europe is strengthening of the leading role of Europe in laser research through Transnational Access, JRA - Joint Research Activities and Networking Activities.
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Numerical simulations of jet formation in laser-target interactions
Váchal, P. ; Liska, R. ; Kuchařík, M. ; Limpouch, J. ; Kmetík, Viliam
Cylindrical version of our two-dimensional Arbitrary Lagrangian Eulerian code PALE is applied for numerical studies of dense plasma jet formation from laser targets. Well collimated plasma expansion from a massive solid target irradiated by a single laser beam with a special profile is investigated. Particular interaction beam profile with intensity minimum in the beam centre is found to be responsible for jet formation during plasma expansion. A deep concave interaction beam profile at PALS is obtained from our simulation of the laser propagation in the amplifying chain and in the focusing system.
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