Abstract

Using KNbO3 crystals for second-harmonic generation in the blue spectral range, we have obtained conversion efficiencies as high as 53.7%. To our knowledge this value is the highest reported for a pulsed laser. A gain-switched nanosecond Ti:sapphire oscillator, amplified by a Cr:LiSrAlF6 multipass amplifier, was used as the fundamental light source. The maximum energy obtained at the harmonic wavelength of 430 nm was 38 mJ for a bandwidth of 230 MHz.

© 1995 Optical Society of America

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