Ultrashort Pulse Laser - Dielectric Interactions and Ultra-Broadband Radiation Generation
Abstract
A balanced program of theory, simulations and experiments is proposed for fundamentalstudies of highly nonlinear physical processes" involving the interaction of intense and highaveragepower laser radiation with materials. The proposed basic research program has potentialfuture Navy relevance in the areas of electro-magnetic interference as well as electronic countermeasuresusing high-aver"age power mid-IR radiation.The program will analyze, evaluate and experimentally demonstrate the nonlinear opticalprocesses for ge"nerating ultra-broadband RF and high-average power mid-IR radiation. Themain focus of the program consists of two components: A) the generation of ultra-broadband andharmonic radiation on material (dielectrics) surfaces and B) generation of high-average powerultra-broad band mid-IR radiation in nonlinear optical material. The mechanisms involvedinclude: photo and collisional surface ioniza"tion, laser induced optical shocks, self-phasemodulation, 4-wave mixing, cross-phase modulation, spectral broadening, surface plasm""aformation, IR and RF generation.Experiments will take place at University of Maryland using a wide range of laserfacilities and"" diagnostics. Available diagnostics enable ultrafast measurements of laser-inducedmaterial transients, and associated charged parti""cle and electromagnetic emissions. A Universityof Maryland developed, laser propagation and matter interaction code will be used to" model andevaluate these processes. The code is unique in that it can simulate extreme spectral broadeningand handle bi-directional wave propagation.Approved for public release
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 01, 2017
- Source ID
- N000141712778
Entities
People
- Phillip A. Sprangle
Organizations
- Office of Naval Research
- United States Navy
- University of Maryland