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 journalArticle

    13 Citations (Scopus)

    Abstract

    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
    Volume43
    Issue number4 A
    DOIs
    Publication statusPublished - 2004 Apr

    Keywords

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

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

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