Abstract
Frequency-resolved optical grating (FROG) based on polarization-gate (PG FROG) and second-harmonic generation (SHG FROG) have been used successfully to characterize ultrashort optical pulses from the infrared to the ultraviolet.1,2 We extend this FROG technique with the use of third-harmonic generation (THG FROG) on the surface of virtually any substrate that transmits the fundamental wavelength.
© 1996 Optical Society of America
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