Passively Q-switched 914 nm microchip laser for lidar systems
نویسندگان
چکیده
Passively Q-switched microchip lasers enable great potential for sophisticated lidar systems due to their compact overall system design, excellent beam quality, and scalable pulse energies. However, many near-infrared solid-state operate at >1000 nm which are not compatible with state-of-the-art silicon detectors. Here we demonstrate a passively laser operating 914 nm. The consists of 3 mm long Nd 3+ :YVO 4 crystal as gain medium while Cr 4+ :YAG an initial transmission 98% is used saturable absorber. Quasi-continuous pumping enables single operation low duty cycles ensure heat generation power consumption. Thus, thermally induced instabilities minimized without active cooling possible ambient temperature changes compensated by adjustment the pump current only. Single-emitter diode 808 leads design robust setup. Utilization cavity approach ensures single-longitudinal mode spectral bandwidths in picometer regime results short pulses durations below 10 ns. Furthermore, quality measurements show that nearly diffraction-limited. A 7% output coupler transmittivity generate energies microjoule peak powers more than 600 W. Long-term duration, energy, wavelength emphasize stability facilitate utilization this context system.
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ژورنال
عنوان ژورنال: Optics Express
سال: 2021
ISSN: ['1094-4087']
DOI: https://doi.org/10.1364/oe.432340