16 May 1994 Mode-locking dynamics of a two-color cross-mode-locked femtosecond Ti:sapphire laser
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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. Wavelengths as much as 57 nm apart can be simultaneously cross-mode- locked. We then investigate the nonlinear interactions between the pulses. We show the nonlinear interaction caused by self focusing can correct for a difference in cavity lengths of up to +/- 3 micrometers corresponding to 20% of the pulse width on each round trip. Further, we show that the concept of mean group delay can be extended to a pair of pulses with disparate spectra and spatial distribution in a nonlinear regenerative system.
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Douglas R. Dykaar, Wayne H. Knox, Aseneth S. Lopez, Sheldon B. Darack, "Mode-locking dynamics of a two-color cross-mode-locked femtosecond Ti:sapphire laser", Proc. SPIE 2116, Generation, Amplification, and Measurement of Ultrashort Laser Pulses, (16 May 1994); doi: 10.1117/12.175844; https://doi.org/10.1117/12.175844

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