NDLI: Fiber Delivered Systems for Laser Ignition of Natural Gas Engines

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Azer, P. Yalin Joshi, Sachin Reynolds, Adam Defoort, Morgan Willson, Bryan Galvanauskas, Almantas Matsuura, Yuji Miyagi, Mitsunobo
Copyright Year	2006
Abstract	Past research has shown that laser ignition is capable of operating high bmep engines at high efficiency and with low emission levels. However, for laser ignition systems to be adopted by industry, one requires a practical (and economical) mode of beam delivery other than the conventional open-path beam delivery that has been used in much of the past research. One potential beam delivery method is via optical fibers capable of handling high peak power. This paper summarizes our recent efforts in this area. Using coated hollow fibers, our research group has demonstrated the delivery of laser pulses to form optical sparks both on the bench-top and for ignition and operation of a single cylinder of an ARES engine. When held relatively straight, the hollow fibers allow transmission of nanosecond pulse energies of 10s of milli-Joules with transmission above 90% and sufficient beam quality for spark formation. We have also been able to deliver optical sparks on the bench-top with high peak power pulsed fiber lasers. Pulse energies in those experiments were approximately 2 mJ. Other recent work has studied the transmission characteristics of recently developed photonic crystal fibers.
Sponsorship	Internal Combustion Engine Division
Starting Page	317
Ending Page	325
Page Count	9
File Format	PDF
ISBN	0791842606
DOI	10.1115/ICEF2006-1574
e-ISBN	0791837920
Volume Number	ASME 2006 Internal Combustion Engine Division Fall Technical Conference (ICEF2006)
Conference Proceedings	ASME 2006 Internal Combustion Engine Division Fall Technical Conference
Language	English
Publisher Date	2006-11-05
Publisher Place	Sacramento, California, USA
Access Restriction	Subscribed
Subject Keyword	Gas engine Hollow fibers Laser ignition Photonic crystal fibers Fiber optics Fiber lasers Lasers Gas engines Ignition Crystal whiskers Engines Fibers Optical fiber
Content Type	Text
Resource Type	Article

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