Abstract
The role of intracavity frequency chirp has been shown to be of crucial importance in the optimization of femtosecond lasers. For the passively mode-locked colliding-pulse ring dye laser it is necessary to consider the effects of group velocity dispersion and self-phase modulation,1-3 In the work reported here, the performance of a passively mode-locked femtosecond rhodamine 110 dye laser3 has been extensively investigated as a function of an Intracavity glass path. For particular values, periodic modulation occurs in the laser output, and satellite pulses appear in the intensity autocorrelation profile as shown In Fig. 1. These readily reproducible observations are reminiscent of the report of high-order solitons in a colliding- pulse mode-locked dye laser by Salin et al.,4 but our results are distinctly different and cannot be explained simply by the nonlinear Schrodinger equation.
© 1988 Optical Society of America
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