Triple-Pass Ti : sapphire Pre-Amplifier with 60dB Gain for Laser Systems Using Chirped-Pulse Amplification [in Japanese]
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By pumping a brewster-cut Ti:sapphire crystal from both sides with a frequency-doubled Nd:YAG laser at 6J/cm<SUP>2</SUP> we achieved a single pass gain of 20dB. This allows to amplify pulses from the nano-Joule to the milli-Joule level with a triple-pass amplifier with > 60dB gain. An output energy up to 3.5mJ was measured, depending on the input energy from the oscillator/stretcher front end. The triple-pass amplifier was used in a chirped-pulse amplification terawatt system. We discuss the advantages of this approach, <I>e.g.</I> for the amplification of very short pulses and for the level of amplified spontaneous emission.
rle 25(12), 890-893, 1997-12-15
The Laser Society of Japan