Cross-Correlation Frequency-Resolved Optical Gating for Test-Pulse Characterization Using a Self-Diffraction Signal of a Reference Pulse

Abstract

A diagnostic system using three frequency-resolved optical gating (FROG) techniques-crosscorrelation, second harmonic generation, and self-diffraction-is reported for the reliable characterization of femtosecond laser pulses. The latter two FROG techniques are employed to evaluate suitability in measurements of the reference pulse. A train of optical pulses generated by the superposition of two femtosecond pulses emitting at 800 nm and 1180 nm has been characterized by the cross-correlation FROG to evaluate the reliability of the present diagnostic system.