Feedback control for accurate shaping of ultrashort optical pulses prior to chirped pulse amplification

Takasumi Tanabe, Kimihisa Ohno, Tatuyoshi Okamoto, Mio Yamanaka, Fumihiko Kannari

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Through experiments, we demonstrate accurate pulse shaping of femtosecond optical pulses in both amplitude and phase, prior to chirped pulse amplification. The nonlinear transfer function of the amplifier was compensated with feedback control referring to the amplified pulse shape measured by frequency resolved optical gating (FROG) or temporal analysis, by dispersing a pair of light e fields (TADPOLE). In FROG-referring control, the pulse shaper is adaptively controlled using a control index calculated from the two-dimensional FROG trace image, while in TADPOLE-referring control, the shaping phase-mask is corrected only a few times using the reconstructed spectrum phase of the output pulse. The performance and limitations of pre-shaping systems are discussed by comparing two pulse shaper devices, namely a liquid-crystal spatial light modulator and an acoustic optical phase dispersion filter, two pulse measurement techniques, and two feedback control schemes.

Original languageEnglish
Pages (from-to)1366-1375
Number of pages10
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number4 A
Publication statusPublished - 2004 Apr


  • Feedback controlled pulse shaping
  • Femtosecond laser pulses
  • Fourier pulse shaper
  • Spectral interferometry

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy


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