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Opt Express. 2008 Nov 10;16(23):18883-8.

Kerr-lens mode-locked Ti:sapphire laser with an additional intracavity nonlinear medium.

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State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China.


We demonstrate a Kerr-lens mode-locked Ti:sapphire laser with an additional Yb(3+) doped Potassium Yttrium Tungstate crystal (Yb:KYW) in the laser cavity, where not only the pump threshold to start mode-locking but also the stable regions to maintain mode-locking can be well-controlled by varying the position of Yb:KYW nearby the confocal focus to change the intracavity Kerr-effects. The pump threshold is reduced down to 800 mW to start the mode-locking operation, which is about 27% less than that for a Ti:sapphire laser without an additional Yb:KYW.

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