Kryštof Kadlec, Jan Šulc, Michal Němec, Helena Jelínková, Karel Nejezchleb
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Pumping beam shaping for optimized performance of Q-Switched Nd:YAG/V:YAG microchip laser emitting at \(1.44\,\upmu\)m
We present a longitudinally diode-pumped Q-switched Nd:YAG/V:YAG microchip laser emitting at \(1.44\,\upmu\)m and the optimization of its output parameters in terms of pulse energy and peak power maximization. Optimization was achieved by modifying the size of the pumping beam with four compact focusing systems, each consisting of an aspheric collimator and one of four aspheric focusing lenses. The laser’s emission spectrum, average power, pulse duration, and spatial beam profile were measured for pumping repetition frequencies ranging from 10 to 715 Hz. Using different focusing systems, it was possible to increase the maximum pulse energy and peak power up to \(91\,\upmu\)J and 14.8 kW, respectively. Thermal effects due to pumping influenced both the laser operation and the parameters of the V:YAG saturable absorber, leading to a decrease in pulse duration from 9.6 to 4.9 ns.
期刊介绍：
Features publication of experimental and theoretical investigations in applied physics
Offers invited reviews in addition to regular papers
Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more
94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again
Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field.
In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.
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