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Fiber laser coupled optical spark delivery system

United States Patent

March 4, 2008
View the Complete Patent at the US Patent & Trademark Office
Laser Ignition and Diagnostic Systems Delivered by Flexible Optical Fibers
A spark delivery system for generating a spark using a laser beam is provided, and includes a laser light source and a laser delivery assembly. The laser delivery assembly includes a hollow fiber and a launch assembly comprising launch focusing optics to input the laser beam in the hollow fiber. The laser delivery assembly further includes exit focusing optics that demagnify an exit beam of laser light from the hollow fiber, thereby increasing the intensity of the laser beam and creating a spark. Other embodiments use a fiber laser to generate a spark. Embodiments of the present invention may be used to create a spark in an engine. Yet other embodiments include collecting light from the spark or a flame resulting from the spark and conveying the light for diagnostics. Methods of using the spark delivery systems and diagnostic systems are provided.
Yalin; Azer (Fort Collins, CO), Willson; Bryan (Fort Collins, CO), Defoort; Morgan (Fort Collins, CO), Joshi; Sachin (Fort Collins, CO), Reynolds; Adam (Fort Collins, CO)
Colorado State University Research Foundation (Fort Collins, CO)
11/ 197,832
August 4, 2005
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with United States Government support under Grant No. DE-FC26-02NT41335 awarded by the Department of Energy. The United States Government may have certain rights in the invention.