Abstract
High-beam-quality sealed-off master oscillator – power amplifier system is developed and studied based on an atomic strontium vapor laser and delivering high-power laser radiation in the middle infrared spectral range. A diffraction self-filtering of the laser radiation is used to reduce the laser beam divergence to the ultimate diffraction limit. A new optical design is utilized for the master oscillator to visualize the optical path through the entire optical scheme. A large-bore sealed-off laser tube is developed and studied with a stable cavity and is applied as a power amplifier as well. Precise microprocessing of optical grade fused quartz is also performed.
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