Abstract
The fiber-optic delivery of sparks in gases is challenging as the output beam must be refocused to high intensity ( for nanosecond pulses). Analysis suggests the use of coated hollow core fibers, fiber lasers, and photonic crystal fibers (PCFs). We study the effects of launch conditions and bending for long coated hollow fibers and find an optimum launch f# of allowing spark formation with reliability for bends up to a radius of curvature of in atmospheric pressure air. Spark formation using the output of a pulsed fiber laser is described, and delivery of pulses through PCFs is shown.
© 2007 Optical Society of America
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