Improved hollow-core photonic crystal fiber design for delivery of nanosecond pulses in laser micromachining applications

Jonathan D. Shephard, Francois Couny, P. S J Russell, J. D C Jones, Jonathan C. Knight, Duncan P. Hand

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

We report the delivery of high-energy nanosecond pulses (~65 ns pulse width) from a high-repetition-rate (up to 100 kHz) Q-switched Nd:YAG laser through the fundamental mode of a hollow-core photonic crystal fiber (HC-PCF) at 1064 nm. The guided mode in the HC-PCF has a low overlap with the glass, allowing delivery of pulses with energies above those attainable with other fibers. Energies greater than 0.5 mJ were delivered in a single spatial mode through the hollow-core fiber, providing the pulse energy and high beam quality required for micromachining of metals. Practical micromachining of a metal sheet by fiber delivery has been demonstrated. © 2005 Optical Society of America.

Original languageEnglish
Pages (from-to)4582-4588
Number of pages7
JournalApplied Optics
Volume44
Issue number21
DOIs
Publication statusPublished - 20 Jul 2005

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