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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 36 — Dec. 20, 2006
  • pp: 9160–9167

Analysis of optical damage mechanisms in hollow-core waveguides delivering nanosecond pulses from a Q-switched Nd:YAG laser

J. P. Parry, T. J. Stephens, J. D. Shephard, J. D. C. Jones, and D. P. Hand  »View Author Affiliations

Applied Optics, Vol. 45, Issue 36, pp. 9160-9167 (2006)

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Hollow-core waveguides consisting of a glass capillary tube with an internal reflective coating are capable of delivering pulse energies of tens of millijoules with improved focusability compared to step index fibers of similar core diameter. We demonstrate the capability of these fibers to deliver high-power Q-switched pulses at the fundamental ( 1064   nm ) , second ( 532   nm ) , and third ( 355   nm ) harmonics of a Nd:YAG laser, both in terms of peak power and beam quality delivered. In terms of peak power delivery, the primary limitation is the occurrence of bend-induced optical damage to the reflective coating. The damage mechanism and the influential factors are analyzed, in particular, the dependence upon the number of guided modes, core diameter, coating thicknesses, and input polarization alignment.

© 2006 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2400) Fiber optics and optical communications : Fiber properties

Original Manuscript: May 30, 2006
Manuscript Accepted: August 14, 2006

Virtual Issues
Vol. 2, Iss. 1 Virtual Journal for Biomedical Optics

J. P. Parry, T. J. Stephens, J. D. Shephard, J. D. C. Jones, and D. P. Hand, "Analysis of optical damage mechanisms in hollow-core waveguides delivering nanosecond pulses from a Q-switched Nd:YAG laser," Appl. Opt. 45, 9160-9167 (2006)

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