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We have performed an experimental study of the nonlinear dynamics in a Kerr-lens mode-locked Ti:sapphire laser producing ≈25 fs pulses. Grassberger-Procaccia and false nearest-neighbor analyses indicate that the pulse trains follow a quasiperiodic route to low-dimensional chaos. The experimental results agree quite well with a simulation based on the Gaussian four-by-four matrix formalism. Pulse-resolved measurements show that the instability in pulse energy is associated with instabilities in the pulse spectral and spatial profile.
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Bolton et al. (2000) studied this question.
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