Vp. Yanovsky et Fw. Wise, FREQUENCY-DOUBLING OF 100-FS PULSES WITH 50-PERCENT EFFICIENCY BY USEOF A RESONANT ENHANCEMENT CAVITY, Optics letters, 19(23), 1994, pp. 1952-1954
The use of a resonant cavity for efficient second-harmonic generation
with 100-fs pulses is demonstrated. With 2-nJ pulses from a mode-locke
d Cr:forsterite laser, 53% conversion efficiency to the second harmoni
c at 625 nm is achieved while similar to 100-fs duration is maintained
. This is an order-of-magnitude improvement over the conversion effici
ency obtained directly with the laser output.