Generation of 85-fsec pulses by synchronous pumping of a colliding-pulse mode-locked dye laser

By synchronously pumping a linear-cavity dye laser that has as one end mirror an antiresonant ring containing a thin saturable absorber jet, we have developed a colliding-pulse mode-locked laser, which is capable of being synchronously amplified. Pulse widths of 85 fsec have been obtained. The dye laser is pumped by the frequency-doubled output of a cw mode-locked Nd:YAG laser. This makes synchronous amplification with short pulses possible and provides the additional advantages of increased reliability, ruggedness, and amplitude stability.