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11 September 2020 15fs-25fs tunable 1030nm laser source for few-cycle laser damage application
Yingjie Chai, Xiaoming Yu, He Cheng, John Beetar, Micheal Chini, M. J. Soileau
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Proceedings Volume 11514, Laser-induced Damage in Optical Materials 2020; 115140P (2020) https://doi.org/10.1117/12.2572618
Event: SPIE Laser Damage, 2020, Online Only
Abstract
Ultrashort laser pulse interaction with solid contains an abundant electronic dynamic process. When the laser pulse width reached few-cycle area, surface damage behaviors can reflect the initial light-electron interaction. In this work, we employed an ultrashort laser source to investigate damage behavior on solid. We investigate the potential of the multi-plate medium to generate broad supercontinuum and few-cycle pulses from a relatively high peak and average power Yb solid-state laser source in a single-pass double-stage multi-plate supercontinuum setup. The experiments were performed by focusing the output from a Yb3+: KGW regenerative amplifier, producing pulses from energy of 600mJ(1kHz) and a duration of 170 fs(~5ps tunable), through a set of thin fused silica plates with individual thicknesses of 1mm to 2mm. This resulted in pulse width of 15fs-25fs (4 cycles-7 cycles) continuous tunable laser source to investigate the laser-induced damage behavior of ZnSe and Fused silica. The damage mechanism and damage threshold are explained in the context of the Keldysh theory and critical electron density.
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Yingjie Chai, Xiaoming Yu, He Cheng, John Beetar, Micheal Chini, and M. J. Soileau "15fs-25fs tunable 1030nm laser source for few-cycle laser damage application", Proc. SPIE 11514, Laser-induced Damage in Optical Materials 2020, 115140P (11 September 2020); https://doi.org/10.1117/12.2572618
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KEYWORDS
Tunable lasers
Dielectrics
Silica
Solids
Amplifiers
Laser sources
Pulsed laser operation
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