Fiber Laser Beam Combining for High Efficiency and Light-Weight HEL Systems

Award Information
Agency: Department of Defense
Branch: Army
Contract: W9113M-07-C-0228
Agency Tracking Number: A062-208-0671
Amount: $729,999.00
Phase: Phase II
Program: SBIR
Awards Year: 2007
Solicitation Year: 2006
Solicitation Topic Code: A06-208
Solicitation Number: 2006.2
Small Business Information
22121 20th Avenue SE, Bothell, WA, 98021
DUNS: 801518747
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Thomas Loftus
 Principal Investigator
 (425) 482-1100
Business Contact
 Dennis Lowenthal
Title: VP of Research & Developm
Phone: (425) 482-1100
Research Institution
High Energy Lasers (HELs) are required for a variety of military directed energy applications including area protection against rockets, artillery, and mortars (RAM). A typical laser enabling these applications should provide at least 10 to 100 kW of output power with excellent beam quality. Moreover, to provide maximum benefit on the modern battlefield, the HEL system should be portable, feature a high electro-optical efficiency and power-to-mass ratio, and have simple thermal management requirements. To meet these demanding specifications while overcoming the size, weight, and thermal management problems inherent to slab-based laser technology, we will demonstrate a spectrally beam combined (SBC) fiber laser system that combines the highly efficient power scaling capabilities for fiber SBC with the power-independent beam quality, high electro-optical efficiency, simple thermal management requirements, compact, modular, and flexible packaging, and fully integrated, automatic spectral control of fiber ring oscillators. To scale the power per fiber to the multi-kW level, we will also explore using polarized photonic crystal fibers (PCF), which have enhanced power handling and significantly lower nonlinear effects than standard large-mode-area (LMA) fibers. This approach dramatically reduces the number of fiber lasers, enables power scaling to the 100+ kW level, and improves system robustness.

* Information listed above is at the time of submission. *

Agency Micro-sites

SBA logo
Department of Agriculture logo
Department of Commerce logo
Department of Defense logo
Department of Education logo
Department of Energy logo
Department of Health and Human Services logo
Department of Homeland Security logo
Department of Transportation logo
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government