Transportation of nanosecond laser pulses by hollow core photonic crystal fiber for laser ignition

摘要

Laser ignition via hollow core photonic crystal fiber (PCF) as a delivery medium has been demonstrated in the present work. Minimum pulse energy from a Q-switched Nd:YAG laser of only 150 μJ was achieved to ignite rich fuel mixtures of methane-air. Aspheric lens of high numerical aperture has been, used to focus the laser beam. Different air/fuel ratios have been examined with different gas temperatures. The results indicate the feasibility of using hollow core PCF for high power beam transmission for laser ignition applications.