Millijoule laser pulse delivery for spark ignition through kagome hollow-core fiber

摘要

We report on power handling oriented design of kagome lattice hollow-core fiber and demonstrate through it for the first time nanosecond laser pulses induced spark ignition in a friendly manner. Two different core designs and transmission bands are investigated and evaluated. The energy threshold damage was measured to be in excess of the 10 mJ level and the output power density is approaching the TW/cm~(2) after focusing; demonstrating the outstanding ability of such fiber for high power delivery.