Frequency-resolved optical gating system with a tellurium crystal for characterizing free-electron lasers in the wavelength range of 10-30 μm

Hokuto Iijima, Ryoji Nagai, Nobuyuki Nishimori, Ryoichi Hajima, Eisuke J. Minehara

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A second-harmonic generation frequency-resolved optical gating (SHG-FROG) system has been developed for the complete characterization of laser pulses in the wavelength range of 10-30 μm. A tellurium crystal is used so that spectrally resolved autocorrelation signals with a good signal-to-noise ratio are obtained. Pulses (wavelength ∼22 μm) generated from a free-electron laser are measured by the SHG-FROG system. The SHG intensity profile and the spectrum obtained by FROG measurements are well consistent with those of independent measurements of the pulse length and spectrum. The pulse duration and spectral width determined from the FROG trace are 0.6 ps and 5.2 THz at full width half maximum, respectively.

Original languageEnglish
Article number123106
JournalReview of Scientific Instruments
Volume80
Issue number12
DOIs
Publication statusPublished - 2009 Dec 1

ASJC Scopus subject areas

  • Instrumentation

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