Efficient Mode-Locked Frequency-Doubled Operation of an Nd:YAlO3 Laser

Abstract

Narrow 0.540‐μm second harmonic (SH) pulses (∼250 psec) have been observed from a mode‐locked Nd:YAlO3 laser at a 300‐mW SH power. The SH conversion efficiency observed was 50%. The laser was mode locked and frequency doubled using a single Ba2NaNb5O15 crystal, and emitted pulses at a frequency of c/l rather than c/2l at high conversion efficiencies. Since Nd:YAlO3 is transparent at 0.54 μm, complete extraction of the SH power generated in both directions is possible.