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21 February 2020 Scalable amplification with a high gain x energy product at room temperature using a thick slab of Yb3+:YAG
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Abstract
We demonstrate an innovative design dedicated to scalable amplification at 1030 nm, which enables the combination of very high gains at room temperature with output pulse energies of several tens milliJoules (mJ). The optical architecture involves an edge-pumped, thick slab of Yb3+: YAG, which is operated in a fairly compact and scalable, non-resonant multi-pass cavity. The laser performance is experimentally benchmarked by means of a 12- pass multiplexing scheme. Thanks to seeding 3ns-long seed pulses with an energy of 300 μJ at 1 Hz, as permitted by usual fibered sources, we experience straightforward linear amplification up to 20-50 mJ with net gains in the range of 15-20 dB. The optical performance needs to be optimized by controlling the operating conditions in a convenient way, in terms of the pump-beam spatial overlap and of alignment. This takes advantage of ultimately high Gain x Energy products, in excess of 10dB.J, in a single-stage unit.
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Alain Jolly, Johan Boullet, and Guillaume Machinet "Scalable amplification with a high gain x energy product at room temperature using a thick slab of Yb3+:YAG", Proc. SPIE 11259, Solid State Lasers XXIX: Technology and Devices, 112590N (21 February 2020); https://doi.org/10.1117/12.2543524
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