High Intensity Laser Survivability of Ultra-Broadband LWS Optics
Abstract
We have been working on obtaining high energy lasers (HEL) windows and optics with very high laser damage threshold (LDT) with negligible reflectivity. The Navy wants optical components that can operate over a broadband (532 nm, for alignment; 600-950nm for visible; 1030-1080 nm, for HELs; 1500-2100 nm, for track and beacon illuminators). We have been able to achieve this objective by applying antireflective surface structures (ARSS) on fused silica windows.The focus of this program will be to explore survivability of next gen, large aperture, broadband, high LDT laser weapon system (LWS) optics. Modifications to existing ARSS fabrication equipment will be made to move from inch- to foot-scale optical apertures. Sub-wavelength surface structure treatment on foot sized optics demonstrating broadband transmission for reducing variation of combined optical chain coating types. Demonstrate survivability at 1 micron wavelength regime at laser fluences over 20 J/cm2. Final LDT testing will be performed at NSWC Dahlgren. The work will be performed by researchers and graduate students with US citizenship or permanent residency.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 08, 2024
- Source ID
- N000142412138
Entities
People
- Thomas Hutchens
Organizations
- Office of Naval Research
- United States Navy
- University of North Carolina at Charlotte