Self-regulated propagation of intense infrared pulses in elongated soft-x-ray plasma amplifiers

Abstract : Increasing the electron density of collisionally pumped plasma-based soft-x-ray lasers offers promising opportunities to deliver ultrashort pulses. However, strong nonlinear effects, such as overionization-induced refraction and self-focusing, hinder the propagation of the laser beam and thus the generation of elongated volume of lasing ions to be pumped. Using a particle-in-cell code and a ray-tracing model we demonstrate that optically preformed waveguides allow for addressing those issues through a self-regulation regime between self-focusing and overionization processes. As a result, guiding intense pulses over several millimeters leads to the implementation of saturated plasma amplifiers.
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https://hal-ensta-paris.archives-ouvertes.fr//hal-01400947
Contributor : Pierre Zaparucha <>
Submitted on : Tuesday, November 22, 2016 - 4:28:05 PM
Last modification on : Wednesday, July 3, 2019 - 10:48:03 AM

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Eduardo Oliva, Adrien Depresseux, Fabien Tissandier, Julien Gautier, Stéphane Sebban, et al.. Self-regulated propagation of intense infrared pulses in elongated soft-x-ray plasma amplifiers. Physical Review A, American Physical Society, 2015, 92 (2), ⟨10.1103/PhysRevA.92.023848⟩. ⟨hal-01400947⟩

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