INTENSE PICOSECOND PULSE GENERATION IN THE 580-610-NM REGION FROM A PURE SIO2-CORE FIBER RING OSCILLATOR SYNCHRONOUSLY PUMPED BY A ND-YAG LASER AT 1.319-MU-M

Generation of intense picosecond pulses in the 580-610 nm region, from a frequency upconversion pure SiO2-core fiber ring oscillator, is des cribed. The single-mode fiber ring oscillator was synchronously pumped by a Q-switched and mode-locked Nd:YAG laser operated at 1.319 mu m. The oscillator produced pulses at 100 MHz with less than 90 ps duratio n and peak powers as high as 120 W. The pulses resided in 300 ns durat ion Gaussian shaped Q-switch bursts at repetition rates of up to 1.5 k Hz.