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20 February 2015 Mode-locking in intracavity frequency doubled Nd:YVO4 laser
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We experimentally study passive mode-locking in Nd:YVO4 laser based on second harmonic generation in KTP crystal. We characterized RF spectra and optical spectra versus pump power, the KTP crystal temperature and position, the output coupler reflectivity, and the intracavity polarizer. We discuss the device performance considering cascaded χ(2) lensing in KTP, frequency doubling nonlinearity, and Kerr lens formed in Nd:YVO4. Implementing an intracavity Lyot filter and cavity length modulation via PZT does not affect mode-locking capability. These results and ultra-low noise mode beat signal open a new perspective for stable RF signal generation by transferring optical reference stability (iodine absorption lines) into RF domain.
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Anton V. Kovalev, Vadim M. Polyakov, Andrey A. Mak, Oleg A. Orlov, Sergey G. Alexeev, and Vladimir V. Vitkin "Mode-locking in intracavity frequency doubled Nd:YVO4 laser", Proc. SPIE 9342, Solid State Lasers XXIV: Technology and Devices, 93421M (20 February 2015);

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