EFFICIENT COUPLING OF GALLIUM ARSENIDE LASER DIODE OUTPUT INTO A FIBER OPTIC FOR REMOTE POWER TRANSMISSION

Award Information
Agency:
Department of Defense
Amount:
$246,685.00
Program:
SBIR
Contract:
N/A
Solitcitation Year:
N/A
Solicitation Number:
N/A
Branch:
Defense Advanced Research Projects Agency
Award Year:
1993
Phase:
Phase II
Agency Tracking Number:
15316
Solicitation Topic Code:
N/A
Small Business Information
Lightwave Electronics Corp.
1161 San Antonio Road, Mountain View, CA, 94043
Hubzone Owned:
N
Woman Owned:
N
Socially and Economically Disadvantaged:
N
Duns:
N/A
Principal Investigator
 David Shannon
 Principal Investigator
 (415) 962-0755
Business Contact
Phone: () -
Research Institution
N/A
Abstract
AN EFFICIENT OPTICAL POWER MODULE IS NEEDED AS THE MAIN COMPONENT IN A REMOTE ELECTRICAL POWER SYSTEM. THIS PROPOSAL OUTLINES THE DESIGN, CONSTRUCTION, AND CHARACTERIZATION OF A FIBER-COUPLED, GALLIUM ARSENIDE DIODE LASER POWER MODULE THAT WILL MEET OR EXCEED THE SPECIFICATIONS SET FORTH BY DARPA. THE POWER MODULE WILL CONSIST OF THREE 3 WATT GALLIUM ARSENIDE DIODE LASERS (9 WATTS TOTAL) COUPLED INTO A 400 UM DIAMETER FIBER OPTIC. THE OUTPUT POWER WILL BE IN EXCESS OF 7 WATTS (80% COUPLING EFFICIENCY) WITH A NUMERICAL APERTURE OF ROUGHLY 0.2. THE WALL PLUG EFFICIENCY WILL BE 10% DEFINED AS THE OPTICAL POWER EMITTED BY THE FIBER DIVIDED BY THE ELECTRICAL POWER (AT 120 VAC) REQUIRED TO OPERATE THE DEVICE. A NOVEL FEATURE OF THIS DESIGN IS THAT THE FIBER DIAMETER, OUTPUT NUMERICAL APERTURE, AND COUPLING EFFICIENCY ALL REMAIN ROUGHLY CONSTANT AS THIS DESIGN IS SCALED TO HIGHER POWER. WITH ADDITIONAL DIODE LASERS, THIS POWER MODULE WILL SCALE TO 25 WATTS OF EMITTED POWER. HIGH POWER FIBER OPTIC SOURCES OF DIODE LASER LIGHT HAVE STRONG COMMERCIAL APPLICATION IN THE AREAS OF REMOTE POWER TRANSMISSION, DIODE-PUMPED SOLID-STATE LASERS, AND LASER SURGERY. THE LOW OUTPUT DIVERGENCE OF THIS OPTICAL SOURCE WILL PERMIT HIGH INTENSITY FOCUSING AS WELL AS LOW-LOSS POWER TRANSMISSION OVER LONG DISTANCES.

* information listed above is at the time of submission.

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