Northrop Grumman chosen to increase efficiency of next-generation military lasers

Sept. 28, 2010
Redondo Beach, CA--Northrop Grumman Corporation (NYSE:NOC) has been awarded a contract to create more-efficient electric lasers for the military.

Redondo Beach, CA--Northrop Grumman Corporation (NYSE:NOC) has been awarded a contract to create more-efficient electric lasers for military use. The work will be done under a new U.S. Department of Defense program called the Robust Electric Laser Initiative (RELI), a first step toward developing the next generation of military-laser technology for more efficient, lighter, and smaller systems.

The Army Space and Missile Defense Command / Army Strategic Forces Command (Huntsville, AL), awarded Northrop Grumman an initial two-year, $8.8 million contract with options that could extend it to a five-year contract valued at $53.3 million.

30% efficiency, scalable to 100 kW
The RELI program seeks to increase laser-system efficiency to greater than 30% while generating good beam quality and a power level of 25 kW capable of being scaled to 100 kW, all of which could be packaged on a military platform. Solid-state laser systems currently are about 20% efficient, according to the Defense Department.

"RELI is a natural follow-on for the next generation of military laser technology from the Joint High Power Solid State Laser program we completed successfully in early 2009," said Steve Hixson, vice president of Advanced Concepts, Space and Directed Energy Systems for Northrop Grumman's Aerospace Systems sector. "Under RELI, we believe the Defense Department will extend the opportunities for electric lasers for military missions."

According to the High Energy Laser-Joint Technology Office (HEL-JTO), which is helping to fund the program, RELI's goal is to deliver a highly reliable, fieldable system that can be coupled with other Defense Department initiatives and tailored for specific platforms across all military services.

"We are confident in our ability to exceed the government's goals for robust military performance and packaging, and also in leveraging commercial fiber-laser technology to reduce cost for implementation and production," noted Dan Wildt, vice president, Directed Energy Systems. "The Joint High Power Solid State Laser (JHPSSL) we developed for the Defense Department provides the first fieldable laser system technology. RELI gives the potential to improve solid-state laser efficiency of weapons on a variety of platforms."

Fiber lasers, beam combining
Several Northrop Grumman high-energy laser thrusts will come together to meet RELI's objectives. In addition to JHPSSL Phase 3 technology, these include two fiber-laser initiatives:

-- Revolution in Fiber Lasers: a Defense Advanced Research Projects Agency program that aims to scale fiber-laser-amplifier technology up to 3 kW

-- 2-Dimensional Diffractive Optical Element Beam Combining Demonstration: a U.S. Air Force Research Laboratory (AFRL) program under which Northrop Grumman is demonstrating diffractive beam combining using AFRL's high-power fiber test bed

The RELI program is funded by HEL-JTO in conjunction with the Army Space and Missile Defense Command / Army Strategic Forces Command; Air Force Research Laboratory; and Office of Naval Research.

About the Author

John Wallace | Senior Technical Editor (1998-2022)

John Wallace was with Laser Focus World for nearly 25 years, retiring in late June 2022. He obtained a bachelor's degree in mechanical engineering and physics at Rutgers University and a master's in optical engineering at the University of Rochester. Before becoming an editor, John worked as an engineer at RCA, Exxon, Eastman Kodak, and GCA Corporation.

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