Studies on three-wavelength characteristics of a femtosecond Ti:sapphire laser

We report here a femtosecond Ti:sapphire laser that generates pulses at three wavelength regions. The central wavelengths are 755 nm, 808 nn and 821 mn. The bandwidths are 4.4 mn, 6.2 MI and 11.8 nm. At 755 nm, the pulse width we measured is 146 fs. Two coupled nonlinear Schrodinger equations describing the evolution of the pulses in the laser are solved numerically. The solutions should be helpful in understanding the three-wavelength characteristics of the femtosecond Ti:sapphire laser.