8 May 1996 Second harmonic generation FROG measurements on a mid-IR free-electron laser
Author Affiliations +
We present results of second harmonic generation (SHG) frequency-resolved optical gating (FROG) measurements on the mid-IR free-electron laser (FEL) at the Stanford Picosecond FEL Center. These are the first SHG FROG measurements performed in the mid-IR or on an FEL. The observed pulses have an optical wavelength near 5 micrometers , and the field profiles reconstructed from the FROG trace exhibit narrow-line absorption and free-induction decay caused by atmospheric water vapor. The SHG FROG signal is easier to isolate than for the polarization gate geometry; hence the SHG traces are not corrupted by a residual background. The experiment used only 10% of the full laser power, and the spectrum and autocorrelation were quickly calculated from the FROG trace, demonstrating the feasibility of using SHG FROG as a real-time diagnostic for the FEL facility.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bruce A. Richman, Bruce A. Richman, Marco A. Krumbuegel, Marco A. Krumbuegel, Rick P. Trebino, Rick P. Trebino, } "Second harmonic generation FROG measurements on a mid-IR free-electron laser", Proc. SPIE 2701, Generation, Amplification, and Measurement of Ultrashort Laser Pulses III, (8 May 1996); doi: 10.1117/12.239706; https://doi.org/10.1117/12.239706

Back to Top