1 kW Fiber Lasers and Alignment Free SBC

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$1,999,731.00
Award Year:
2007
Program:
SBIR
Phase:
Phase II
Contract:
N68936-07-C-0024
Award Id:
69469
Agency Tracking Number:
B041-005-0119
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
22121 20th Avenue SE, Bothell, WA, 98021
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
801518747
Principal Investigator:
Thomas Loftus
Principal Investigator
(425) 482-1100
tom.loftus@aculight.com
Business Contact:
Dennis Lowenthal
VP of Research & Developm
(425) 482-1100
dennis.lowenthal@aculight.com
Research Institution:
n/a
Abstract
Spectral Beam Combination (SBC) has been proven as a scalable beam combining approach for high power fiber lasers. Demonstrations at Aculight have shown 522 Watts of near diffraction limited power from three combined fiber laser sources; and the dispersive element, a Multi-Layer-Dielectric (MLD) diffraction grating, will operate well above 1.5 kWatts/cm2 of incident power allowing ~100 kWatt sources to be feasible with a relatively small grating of 10x10 cm2 while maintaining excellent beam quality. In this proposed work, Aculight will increase its single fiber laser power from ~300 Watts to over 1 kWatt, suitable for Spectral Beam Combination (SBC), delivering properties including: polarized output, narrow bandwidth, and diffraction limited beam quality. The laser will be all-in-fiber-pumped geometry (no free space pump components). An alignment-free SBC fiber tray assembly will be engineered and tested with the multiple ~300 Watt fiber lasers available at Aculight; and then tested using the 1 kWatt fiber laser to be demonstrated in the early part of this work. These results will enable a clear pathway to a 10 kWatt demonstration, and an eventual demonstration of SBC high power fiber sources to the 100 kWatt level.

* information listed above is at the time of submission.

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