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Open AccessArticle

High Power Spark Delivery System Using Hollow Core Kagome Lattice Fibers

1
Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523, USA
2
Seaforth LLC, Fort Collins, CO 80523, USA
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Author to whom correspondence should be addressed.
Materials 2014, 7(8), 5700-5710; https://doi.org/10.3390/ma7085700
Received: 20 June 2014 / Revised: 24 July 2014 / Accepted: 30 July 2014 / Published: 7 August 2014
This study examines the use of the recently developed hollow core kagome lattice fibers for delivery of high power laser pulses. Compared to other photonic crystal fibers (PCFs), the hollow core kagome fibers have larger core diameter (~50 µm), which allows for higher energy coupling in the fiber while also maintaining high beam quality at the output (M2 = 1.25). We have conducted a study of the maximum deliverable energy versus laser pulse duration using a Nd:YAG laser at 1064 nm. Pulse energies as high as 30 mJ were transmitted for 30 ns pulse durations. This represents, to our knowledge; the highest laser pulse energy delivered using PCFs. Two fiber damage mechanisms were identified as damage at the fiber input and damage within the bulk of the fiber. Finally, we have demonstrated fiber delivered laser ignition on a single-cylinder gasoline direct injection engine. View Full-Text
Keywords: fibers; laser-ignition; photonic crystal fiber; kagome; lasers fibers; laser-ignition; photonic crystal fiber; kagome; lasers
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Dumitrache, C.; Rath, J.; Yalin, A.P. High Power Spark Delivery System Using Hollow Core Kagome Lattice Fibers. Materials 2014, 7, 5700-5710.

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