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High Brightness Beam-Coupler for High Power Diode Lasers

Award Information

Department of Defense
Award ID:
Program Year/Program:
2002 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
135 S. Taylor Avenue, Louisville, CO 80027 0302
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2002
Title: High Brightness Beam-Coupler for High Power Diode Lasers
Agency / Branch: DOD / ARMY
Contract: DAAE30-02-C-1041
Award Amount: $119,902.00


"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

Principal Investigator:

Iain T. McKinnie
Senior Reseach Scientist

Business Contact:

Sammy W. Henderson
Executive VP and CTO
Small Business Information at Submission:

Coherent Technologies, Inc.
655 Aspen Ridge Drive Lafayette, CO 80026

EIN/Tax ID: 840953476
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No