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We experimentally generate a stochastic electromagnetic beam with controllable coherence, employing two crossed zero-twisted nematic liquid crystal spatial light modulators. The coherence of the stochastic electromagnetic beam can be controlled by the variation magnitude of phase modulation of the spatial light modulators. We measure the coherence properties of the beam using Young's interference...
Amplification of vortex beam in flash-lamp-pumped Nd:YAG amplifiers has been demonstrated. A maximum output pulse energy up to 995mJ has been achieved at 10 Hz in a 10 ns pulse, corresponding to an amplification efficiency of 295%. Second-harmonic generation of the amplified vortex output was performed using nonlinear a KD.P crystal. Maximum second-harmonic energy of 470mJ was generated. The joule...
Optical vortex amplification up to the joule level using flash-lamp-pumped Nd:YAG amplifiers has been demonstrated for the first time. In experiment, vortex seed pulses were converted from a conventional $Q$ -switched Nd:YAG laser output by a spiral phase plate and amplified with two Nd:YAG amplifier stages. A maximum output energy of optical vortex up to 995 mJ has been achieved at 10 Hz in a 10-ns...
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