The LUCIA (French acronym for "Laser Ultra-Court Intenses, et Applications") laser system consists in an oscillator delivering around 1 Joule in about 10 ns, followed by a multipass two-heads amplifier stage. In our design, oscillator and amplifier stages are longitudinally pumped at 10 Hz with respectively 15 and 10 kW/cm/sup 2/ intensity with 1 ms pulses, allowing close to 20% optical efficiency. The diode pumped Yb:YAG lasers are particularly good candidate for such an application, because centimeter-scale size aperture YAG crystal are easily available, because of reduced heat dissipation. it is concluded that the pulsed solid state lasers able to deliver large energy in the nanosecond regime with a high repetition rate, 10 Hz at least, will be the basic component for the new generation of high energy lasers. These characteristics lead indeed to diode pumped devices and rare-earth doped media based materials.
The LUCIA* project: towards 100 Joules nanosecond pulses, kW averaged power, based on ytterbium diode pumped solid state laser
2003-01-01
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Conference paper
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