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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 21 — Jul. 20, 1998
  • pp: 4777–4781

Single-crystal laser-heated pedestal-growth sapphire fibers for Er:YAG laser power delivery

Rick K. Nubling and James A. Harrington  »View Author Affiliations


Applied Optics, Vol. 37, Issue 21, pp. 4777-4781 (1998)
http://dx.doi.org/10.1364/AO.37.004777


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Abstract

The Er:YAG laser-induced damage (LID) threshold and modal properties of single-crystal sapphire fibers grown by the laser-heated pedestal-growth method have been measured. The lowest loss (∼0.4-dB/m) sapphire fibers produce little mode mixing and therefore deliver a near-single-mode output profile if the Er:YAG laser input beam profile is also nearly Gaussian. Normally, however, Er:YAG laser output beam profiles are multimode with numerous high-energy spikes. This leads not only to a multimode output from the fiber but also increased fiber loss that is due to higher-order mode coupling. The results of LID testing give a damage fluence of ∼1.4 kJ/cm2 for 300-μm core-only sapphire fibers at 2.94 μm.

© 1998 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2310) Fiber optics and optical communications : Fiber optics
(140.3330) Lasers and laser optics : Laser damage
(160.3380) Materials : Laser materials

History
Original Manuscript: March 12, 1998
Published: July 20, 1998

Citation
Rick K. Nubling and James A. Harrington, "Single-crystal laser-heated pedestal-growth sapphire fibers for Er:YAG laser power delivery," Appl. Opt. 37, 4777-4781 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-21-4777

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