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28 February 2006 Mode locked Nd:YVO4 laser with intracavity synchronously pumped optical parametric oscillator
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The motivation of this work is the development of laser sensor and gyroscope based on short pulse solid state ring laser. In comparison with regular ring laser containing the gain medium and saturable absorber, where counterpropagating pulses overlap, a ring synchronously pumped optical parametric oscillator, in which the pulse crossing point is controlled externally by the time of arrival of the pump pulses, is the ideal source for short pulse laser sensor. The optimum configuration is a synchronously pumped parametric oscillator inserted inside the optical resonator of the diode pumped mode-locked solid state laser. We are developing a such system, as a first step we have demonstrated operation of a diode pumped Nd:YVO4 passively mode-locked laser using semiconductor saturable absorber with synchronously pumped intracavity optical parametric oscillator in linear configuration. The repetition rate of the pump laser was 132 MHz and the pulse duration of 15 ps. Parametric oscillator was based on 20 mm long Brewster cut single grating (with poling periode of 30.3 μm) periodically poled magnesium doped lithium niobate (MgO:PPLN) crystal. The temperature tuning of parametric luminescence from the crystal with peak wavelength at 1537 nm - 1550 nm for temperature variation from 30 °C to 57 °C was observed.
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Alena Zavadilova, Václav Kubeček, Miroslav Čech M.D., Petr Hiršl, Helena Jelínkova, and Jean-Claude Diels "Mode locked Nd:YVO4 laser with intracavity synchronously pumped optical parametric oscillator", Proc. SPIE 6100, Solid State Lasers XV: Technology and Devices, 61001G (28 February 2006);

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