Widely tunable two-color mode-locked Ti:sapphire laser with pulse jitter of less than 2 fs

An improved laser setup for reliable dual-wavelength cross mode locking is reported. We obtain two perfectly synchronized pulse trains that are independently tunable over a wavelength interval as wide as 100 nm and with pulse durations below 30 fs. The pulses are shown to be cross correlated with interferometric accuracy, thus demonstrating an astonishing potential of the nonlinear coupling mechanism.