We utilize the two-photon conductivity of a fused-silica substrate to produce a photoconductive switch for use in an intensity autocorrelator for ultraviolet ultrashort pulses. We perform measurements at 267 nm with pulse durations in the range of 110–330 fs and with energies as weak as 10 nJ. Based on the bandgap of fused silica, this device can potentially operate in the wavelength range of 140–280 nm.
© 1998 Optical Society of America
Alexandre M. Streltsov, Jinendra K. Ranka, and Alexander L. Gaeta, "Femtosecond ultraviolet autocorrelation measurements based on two-photon conductivity in fused silica," Opt. Lett. 23, 798-800 (1998)