Intense ultrashort pulse generation using the JAERI far-infrared free electron laser

R. Nagai, R. Hajima, N. Nishimori, N. Kikuzawa, M. Sawamura, E. Minehara

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)


    An intense ultrashort optical pulse has been quasi-continuously generated using a superconducting RF linac-based free-electron laser at a wavelength of 22.5 μm. The pulse shape and width are measured by second-order optical autocorrelation with a birefringent Te crystal. At synchronism of the optical resonator, the pulse shape is a smooth single pulse with an FWHM width of 255 fs and energy of 74 μJ. A train of subpulses is developed by increasing the desynchronism of the optical resonator. The measured results are in good agreement with numerical simulation.

    Original languageEnglish
    Pages (from-to)129-133
    Number of pages5
    JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
    Issue number1-2
    Publication statusPublished - 2002 May 1


    • Far-infrared
    • Free-electron laser
    • Ultrashort pulse

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics
    • Instrumentation


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