Journal of the Optical Society of Korea

Optical Society of Korea (한국광학회)
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High-power Femtosecond Ti:sapphire Laser at 1 KHz with a Long-cavity Femtosecond Oscillator

  • Sung, Jae-Hee (Dept. of Physics and Coherent X-ray Research Center, Korea Advanced Institute of Science and Technology) ;
  • Hong, Kyung-Han (Dept. of Physics and Coherent X-ray Research Center, Korea Advanced Institute of Science and Technology) ;
  • Nam, Chang-Hee (Dept. of Physics and Coherent X-ray Research Center, Korea Advanced Institute of Science and Technology)
  • Received : 2003.06.27
  • Published : 2003.09.01
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Abstract

A chirped-pulse amplification femtosecond Ti:sapphire laser operating at 1 KHz has been developed. The laser system consisted of a long-cavity femtosecond oscillator, a four-pass grating pulse stretcher, two multi-pass amplifiers and a double-pass grating pulse compressor. Thermal lensing at the amplifiers was reduced by cooling Ti:sapphire crystals using Peltier coolers. Gain narrowing and residual phase errors were compensated for by the use of an acousto-optic pulse shaper. The final laser output had an energy per pulse of 2.0 mJ and a pulse duration of 19.5 fs, reaching 0.1 TW at 1 KHz.

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References

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