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11 November 2009 Diode-pumped passively mode-locked laser using SHG in periodically poled crystals
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Experimental results on passive mode-locking of Nd:YVO4 laser using intracavity frequency doubling in periodically poled KTP (PPKTP) crystal are reported. Both, negative cascaded chi-2 lensing and frequency doubling nonlinear mirror (FDNLM) are exploited for the laser mode-locking. The FDNLM based on intensity dependent reflection in the laser cavity ensures self-starting and self-sustaining mode-locking while the cascaded chi-2 lens process contributes to substantial pulse shortening. This hybrid technique enables generation of stable trains of pulses at high-average output power with several picoseconds pulse width. The pulse repetition rate of the laser is 117 MHz with average output power ranging from 0.5 W to 3 W and pulse duration from 2.9 to 5.2 ps.
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Hristo Iliev, Danail Chuchumishev, Ivan Buchvarov, and Valentin Petrov "Diode-pumped passively mode-locked laser using SHG in periodically poled crystals", Proc. SPIE 7501, International Conference on Ultrafast and Nonlinear Optics 2009, 750106 (11 November 2009);

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