Eye-safe fiber-coupled laser pumps for high power

Award Information
Agency: Department of Defense
Branch: Army
Contract: W911QX-10-C-0016
Agency Tracking Number: A092-047-0749
Amount: $69,737.00
Phase: Phase I
Program: SBIR
Awards Year: 2009
Solicitation Year: 2009
Solicitation Topic Code: A09-047
Solicitation Number: 2009.2
Small Business Information
5408 NE 88th Street, Bldg E, Vancouver, WA, 98665
DUNS: 799811646
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Paul Leisher
 Device Engineer
 (360) 566-4460
Business Contact
 Mike Cooper
Title: Business Unit Controller
Phone: (360) 566-4460
Email: mike.cooper@nlight.net
Research Institution
Erbium-doped solid state and fiber lasers provide an attractive source at eyesafe wavelengths, and the potential for ultra-low quantum defect pumping by diode lasers operating around 1532-nm. Unfortunately, these systems, to date, have been limited by the spatial brightness of the diode pumps. Under the proposed Phase 1 program, nLight will design, fabricate, test, and deliver to the Army (or a recipient of their choosing) a >30W (rated) compact, conductively-cooled diode laser pump module, coupled to a 100 µm core, 0.15 NA fiber. The module is based on nLight’s Pearl platform, which has recently been leveraged to deliver record brightness in the 9xx-nm wavelength regime. This proposal seeks to extend the technique to the eyesafe wavelengths. The unit will emit at 1532.2 nm with a predicted electrical-to-optical efficiency (measured at the fiber output) of 27%. As an option to the program, nLight will design and deliver to the Army (or a recipient of their choosing) a similar-performing unit which is wavelength locked (spectral width < 0.5nm FWHM) by means of a volumetric Bragg grating. The module will include an integrated heater on the grating element to allow wavelength tunability in the range of +/- 0.2 nm.

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

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