XeCl laser with an output energy 200 J

Abstract

This paper discusses the mechanical effect of water on the deformation of silicon monocrystals under nano-indentation with the aid of molecular dynamics analysis. The rigid TIP4P model was used to simulate the interactions between water molecules while the long-ranged non-bonded Lennard-Jones potential was applied for the pairs of unlike molecules. It was found that upon loading water molecules are lodged into the cavities of the silicon substrate, causing subsurface damage. The diamond cubic structure in the indentation zone transforms into an amorphous state with a body-centred tetragonal form (β-silicon) below the indentor. The presence of water significantly reduces the indentor-silicon adhesion that alters the structure of the residual deformation zone after complete unloading.

High-Power Laser Systems of UV and Visible Spectral Ranges

“…Russian institutions also develop and create the powerful excimer lasers and laser systems [4][5][6][7][8][9][10][11][12]. In particular, a KrF laser system with a Garpun output unit (Institute of Physics, Russian Academy of Sciences) has an output aperture with a size of 16 × 18 cm and one generates radiation pulses with energy of 80 J and pulse duration of 100 ns [12].…”

“…The excimer lasers developed at the High-Current Electronics Institute (HCEI), Siberian Division, Russian Academy of Sciences, generate pulses with an energy of greater than 100 J [4][5][6][8][9][10][11]. The two most powerful XeCl lasers (308 nm) with apertures of 40 [8] and 60 cm [9][10][11] generate pulses with energies of 660 J and 1.9 kJ and pulse durations of about 350 and 250 ns, respectively.…”

Parameters of the THL-100 Hybrid Femtosecond Laser System After Modernization

“…One of such new approaches to the creation of multi-terawatt and petawatt femtosecond laser systems has been developed in the last few years by two Russian scientific groups (HCEI, Tomsk and P. N. Lebedev Physical Institute RAS, Moscow). It is based on the application of a femtosecond solid-state Ti:sapphire laser complex (2 nd harmonic at 475 nm) and a gas XeF(С-А) amplifier with optical pumping using a high-power electron accelerator [2][3][4][5][6][7][8][9]. The advantage of such hybrid (solid-state and gas media) scheme is a lower admissible time stretching factor of femtosecond pulses before their amplification in the gas medium (by more than three orders of magnitude lower than in the solid-state systems).…”

The study of second harmonic generation of the femtosecond laser pulses with a 950nm central wavelength

“…It operates in the visible spectrum (475 nm) and does not have the traditional limitations on the power of the output beam [8][9]. For its creation, the accumulated experience in the development of the high-power gas lasers was used [10][11][12]. To date the power of 14 TW was realized on it [13][14][15] and it is planned to increase the power up to 50-100 TW.…”