Tunable RF Generation with GHz Bursts of High-Intensity USPLs
Abstract
We propose a two-year program to investigate the RF emission generated by high-intensity ultrashort pulse laser (USPL) trains with sub-nanosecond pulse spacings. We have already demonstrated that the RF emission on solid targets can be spectrally tuned in the GHz frequency range by modifying the pulse train structure. With laser filaments, we can generate these effects at long distances and have demonstrated RF generation at approximately 30 m standoff. Here, we propose studies with a large matrix of high repetition rate (HRR) USPL burst structures (with varied pulse numbers, temporal separations, and energy distributions) to further optimize this method of RF generation. These investigations will involve examining the burst-target interaction physics, including ablation and plasma-shockwave generation, to gain a thorough understanding of the underlying plasma physics and benchmark computer models. Additionally, we will study the stand-off capability of the unique method of RF generation with experiments involving up to 50 m of propagation indoors and 1 km in the field at TISTEF. These studies will greatly benefit current DoD-funded programs and collaborations with NRL and AFRL. The majority of the work will be carried out by graduate student research associates (GRAs) and we will work closely with DoD collaborators.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 05, 2025
- Source ID
- FA95502410070
Entities
People
- Danielle Reyes
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Central Florida Board of Trustees