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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 21 — Jul. 20, 2005
  • pp: 4582–4588

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

Jonathan D. Shephard, Francois Couny, Phillip St. J. Russell, Julian D. C. Jones, Jonathan C. Knight, and Duncan P. Hand  »View Author Affiliations


Applied Optics, Vol. 44, Issue 21, pp. 4582-4588 (2005)
http://dx.doi.org/10.1364/AO.44.004582


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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

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(350.3390) Other areas of optics : Laser materials processing

Citation
Jonathan D. Shephard, Francois Couny, Phillip St. J. Russell, Julian D. C. Jones, Jonathan C. Knight, and Duncan P. Hand, "Improved hollow-core photonic crystal fiber design for delivery of nanosecond pulses in laser micromachining applications," Appl. Opt. 44, 4582-4588 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-21-4582

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