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- Title
Generation of high average power, 7.5-fs blue pulses at 5 kHz by adaptive phase control.
- Authors
Zhou, X.; Kanai, T.; Yoshitomi, D.; Sekikawa, T.; Watanabe, S.
- Abstract
The spectral width of a 5-kHz Ti:sapphire laser system was broadened by spectral control in a regenerative amplifier consisting of broadband chirped mirrors. The dispersion over the wide spectral range was compensated by a deformable mirror along with a genetic algorithm, resulting in a pulse width of 15 fs. The pulse width is the shortest, to our knowledge, in chirped pulse amplification systems with a regenerative amplifier. The phase distortion of broadband frequency doubling in addition to the Ti:sapphire laser was compensated by using the self-diffraction intensity in sapphire as the feedback signal into the genetic algorithm, resulting in a pulse width of 7.5 fs. The average power of the second harmonic was 1 W with a fundamental input of 7 W.
- Subjects
INDUSTRIAL lasers; COMBINATORIAL optimization; GENETIC algorithms; GENETIC programming; LASERS; PULSE (Heart beat)
- Publication
Applied Physics B: Lasers & Optics, 2005, Vol 81, Issue 1, p13
- ISSN
0946-2171
- Publication type
Article
- DOI
10.1007/s00340-005-1878-2