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1 May 2014 Laser-induced microwave generation with nonlinear optical crystals
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We report about a novel technique to generate microwave radiation by the irradiation of a nonlinear optical crystal with uniformly spaced, ultrashort optical pulses delivered by a mode-locked laser. We study systematically the laser polarization and intensity dependence of the microwave signal to conclusively show that it is a nonlinear phenomenon and that it originates from optical rectification. The measurements have been conducted using KTP, LBO and ZnSe crystals. The observed pulsed microwave signals are harmonically related to the laser pulses repetition rate, a feature that can be exploited to develop an innovative ultrafast laser detector.
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Francesco Borghesani, Caterina Braggio, Giovanni Carugno, Federico Della Valle, and Giuseppe Ruoso "Laser-induced microwave generation with nonlinear optical crystals", Proc. SPIE 9136, Nonlinear Optics and Its Applications VIII; and Quantum Optics III, 913609 (1 May 2014);

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