This invention proposes achieving the same effect of a single, high intensity pulse through the use of a closely spaced burst of short duration pulses. By keeping the intensity of the individual pulses below the damage threshold the risk of catastrophic damage is greatly mitigated. Additionally, the pulses are directed to strike the target at locations temporally and spatially sufficiently…
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![Left to right: Drew Willard, Brendan Reagan, and Issa Tamer work on the Tm:YLF laser system. Photos by Jason Laurea](/sites/default/files/styles/scale_exact_400x400_/public/2024-05/TmYLF%20laser.jpg?itok=63DzYeha)
This invention proposes the use of a nonlinear spectral broadening subsystem as a post-CPA pulse compression add-on for high energy laser systems. The proposed solution utilizes the beam profile of a high peak power laser as a reference to shape a highly transmissive nonlinear plastic (e.g., CR39) itself to ensure a spatially homogeneous nonlinear spectral broadening.
![geothermal steam exhaust](/sites/default/files/styles/scale_exact_400x400_/public/2022-06/geothermal_steamexhaust_big.jpg?itok=CHdFQcG1)
LLNL has a patented process to produce colloidal silica directly from geothermal fluids. Livermore’s process uses membranes to produce a mono-dispense slurry of colloidal silica particles for which there are several applications. LLNL has demonstrated that colloidal silica solutions that result from extraction of silica from geothermal fluids undergo a transition to a solid gel over a range of…
![Optics](/sites/default/files/styles/scale_exact_400x400_/public/2022-07/Optics.jpg?itok=it_V--Tv)
The LLNL method for optimizing as built optical designs uses insights from perturbed optical system theory and reformulates perturbation of optical performance in terms of double Zernikes, which can be calculated analytically rather than by tracing thousands of rays. A new theory of compensation is enabled by the use of double Zernikes which allows the performance degradation of a perturbed…
![Serrated Light Illumination for Deflection-Encoded Recording (SLIDER)](/sites/default/files/styles/scale_exact_400x400_/public/2022-06/Serrated%20Light%20Illumination%20for%20Deflection-Encoded%20Recording%20%20%28SLIDER%29.jpg?itok=8Pa6FW-h)
The SLIDER deflector includes a waveguide, a serrated mask positioned above the waveguide cladding, and a synchronized pump beam. The pump beam illuminates the serrated mask with a short pulse and transfers its pattern to the guiding layer where it imprints a sequence of prisms. The prisms are activated via nonlinear optical effects in the semiconductor and persist for the duration of the…