High Brightness Beam-Coupler for High Power Diode Lasers

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$119,902.00
Award Year:
2002
Program:
SBIR
Phase:
Phase I
Contract:
DAAE30-02-C-1041
Award Id:
57933
Agency Tracking Number:
A012-1343
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
655 Aspen Ridge Drive, Lafayette, CO, 80026
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
149375479
Principal Investigator:
IainMcKinnie
Senior Reseach Scientist
(303) 604-2000
iainm@ctilidar.com
Business Contact:
SammyHenderson
Executive VP and CTO
(303) 604-2000
sammy@ctilidar.com
Research Institute:
n/a
Abstract
"High brightness lasers have been identified as a means of producing acceptably short and reliable munition ignition times in large caliber guns. For practical purposes, these lasers must be compact, low-cost, efficient and robust to withstand the harshshock environment. High power multiple emitter diode bars can meet these criteria, but poor beam quality (typical M2>1000 from a single 50W bar) and low spatial coherence are incompatible with the high brightness requirement for ignition. CTI proposes anovel, compact and efficient active beam-combining architecture, capable of dramatically enhancing the combined brightness of multiple diode bars to generate near diffraction-limited output. The beam-coupler has excellent heat dissipation, and aproprietary architecture that virtually eliminates thermo-optic beam distortions. In one possible configuration, up to twelve 50W diode bars are butt-coupled into, and combined in, a single 70mm long lightweight module. Modeling, anchored by our recentproof-of-concept demonstrations indicates a brightness enhancement of more than 300x with respect to the direct diode output. Modules may be stacked to scale power to multi-kW levels, as required, without loss of brightness. CTI's proven ability todesign and engineer rugged and compact electro-optic systems for demanding environments will ensure a successful overall development program. Anticipated applications include (1) ignition systems for

* information listed above is at the time of submission.

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