Use of hollow core fibers, fiber lasers, and photonic crystal fibers for spark delivery and laser ignition in gases
The fiber-optic delivery of sparks in gases is challenging as the output beam must be refocused to high intensity ({approx}200 GW/cm2 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 2 m long coated hollow fibers and find an optimum launch f of {approx}55 allowing spark formation with {approx}98% reliability for bends up to a radius of curvature of 1.5 m in atmospheric pressure air. Spark formation using the output of a pulsed fiber laser is described, and delivery of 0.55 mJ pulses through PCFs is shown.
- OSTI ID:
- 20929760
- Journal Information:
- Applied Optics, Journal Name: Applied Optics Journal Issue: 19 Vol. 46; ISSN 0003-6935; ISSN APOPAI
- Country of Publication:
- United States
- Language:
- English
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