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Amplification of 3 ps pulses to >20GW in a 1Hz CO2 laser MOPA chain is described. Several ways and experimental progress towards increase of the peak power for 10 µm pulses are discussed.
3 ps pulses are amplified to >10 GW peak power in a TEA CO2 laser using ac Stark broadening. Demonstration of such broadband amplification opens opportunities for a powerful mid-IR source at a high-repetition rate.
A train of multiterawatt, 3 ps CO2 laser pulses is used for proton acceleration in a plasma at the critical density. Maximum energy of ions is strongly affected by a temporal structure of the pulse.
15TW picosecond 10μm laser pulses are obtained at the UCLA Neptune Laboratory achieving record CO2 laser power. This peak power opens unique opportunities for applications in high-field experiments in the mid-IR range.
2 kW, 200 ns pulses were produced in a noncollinear phase-matched GaAs crystal. The terahertz source tunable in the range 0.5-3.0 THz with a step of 40 GHz is pumped by a dual-beam TEA CO2 laser.
A novel technique for low-temperature bonding of GaAs wafers using an interboundary Teflon film is developed. A 2 x 2 cm2 quasi-phase matched structure of 5 wafers pumped by CO2 laser lines generated the narrow-band THz radiation.
Seeded FEL/IFEL techniques can be used for modulation of a relativistic electron beam longitudinally on the radiation wavelength. However, in the 1-10 THz range, which is of particular importance for the matched injection of prebunched electrons into a laser-driven plasma accelerating structure, a suitable radiation source is not available. At the UCLA Neptune Laboratory we have built and fully characterized...
A 100 GW CO2 laser pulse with a duration of ~200 ps was guided in a 2-cm long stainless steel waveguide. Transmission was studied both for gas-filled and evacuated waveguides at intensities around 5 times 1014 W/cm2
A plasma heatwave accelerator with a gradient /spl sim/1.3 GeV/m is presented. It is shown that for diffraction limited plasmas, when efficiency of the plasma wave excitation is restricted by ionization-induced refraction, acceleration of electrons is enhanced by using asymmetric, long pulses.
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