High-Power, High-Efficiency 1.907nm Diode Lasers

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$69,675.00
Award Year:
2006
Program:
SBIR
Phase:
Phase I
Contract:
NNL06AA44P
Award Id:
77296
Agency Tracking Number:
054017
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
5408 NE 88th Street, Building E, Vancouver, WA, 98665
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
799811646
Principal Investigator:
StevePatterson
Principal Investigator
(360) 713-5182
steve.patterson@nlight.net
Business Contact:
DavidGustafson
Business Official
(360) 566-4471
david.gustafson@nlight.net
Research Institute:
n/a
Abstract
nLight proposes to develop high-power, high-efficiency laser diodes emitting at 1907nm. Performance is expected to improve from the current state-of-the-art technology at 15C of 20% electrical-to-optical (E/O) conversion efficiency and 11.5W continuous-wave power (CW) to 25% E/O efficiency and 18W of CW power at the conclusion of Phase I. At the conclusion of Phase II, these values are expected to improve to 38% E/O efficiency and greater than 35W CW power. Quasi-CW power will be >>100W per laser bar. Such lasers meet the brightness and power requirements for the direct pumping of the quasi 4-level 5I7 to 5I8 transition in singly-doped Ho:YAG lasers. Compared to the diode-pumping of Thulium-sensitized Ho:YAG, direct diode pumping of Ho:YAG takes advantage of Holmium's much larger emission cross section, the absence of Ho:Tm up conversion, and Ho:YAG's large energy storage lifetime. Direct diode pumping of Ho:YAG also results in decreased system size, weight and complexity and an improvement in overall system efficiency when compared to pumping with a diode-pumped Th:YAG laser, all critical metrics for space and airborne platforms. This work could be extended to 18xxnm and 20xxnm quite readily with comparable power and efficiency performance.

* information listed above is at the time of submission.

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