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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 8,
  • Issue 1,
  • pp. 123-125
  • (2010)

Amplified spontaneous emission contrast of CPA laser

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Abstract

The influence on the level of amplified spontaneous emission (ASE) contrast resulting from the different seed pulse energies has been experimentally studied in a 10-TW-level femtosecond Ti:sapphire chirped pulse amplification laser. It is found that, with the seed pulse energy increasing, the ASE pedestal is suppressed more efficiently, and the ASE contrast is improved with a saturable tendency. The measurement of ~2×10<sup>-8</sup> ASE contrast in the range of more than 50 ps before the main pulse is achieved in the laser.

© 2010 Chinese Optics Letters

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