We demonstrate mode-locked two-wavelength synchronized operation of a single cw-pumped Ti:sapphire laser. There is no active feedback or external cavity. The measured cross correlation is 105 fs. Cross mode locking is maintained for relative cavity length detunings as large as ±3 μm and wavelength offsets as large as 20 nm.
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Dykaar et al. (1993) studied this question.
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