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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 36, Iss. 7 — Mar. 1, 1997
  • pp: 1610–1614

Delivery of 10-MW Nd:YAG laser pulses by large-core optical fibers: dependence of the laser-intensity profile on beam propagation

B. Richou, I. Schertz, I. Gobin, and J. Richou  »View Author Affiliations


Applied Optics, Vol. 36, Issue 7, pp. 1610-1614 (1997)
http://dx.doi.org/10.1364/AO.36.001610


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Abstract

A large-core multimode optical fiber of a few meters length is studied as a 10-MW beam delivery system for a 15-ns pulsed Nd:YAG laser. A laser-to-fiber vacuum coupler is used to inhibit air breakdown and reduce the probability of dielectric breakdown on the fiber front surface. Laser-induced damage inside the fiber core is observed behind the fiber front surface. An explanation based on a high power density is illustrated by a ray trace. Damaged spots and measurements of fiber output energies are reported for two laser beam distributions: a flat-hat type and a near-Gaussian type. Experiments have been performed to deliver a 100-pulse mean energy between 100 and 230 mJ without catastrophic damage.

© 1997 Optical Society of America

History
Original Manuscript: January 19, 1996
Revised Manuscript: June 11, 1996
Published: March 1, 1997

Citation
B. Richou, I. Schertz, I. Gobin, and J. Richou, "Delivery of 10-MW Nd:YAG laser pulses by large-core optical fibers: dependence of the laser-intensity profile on beam propagation," Appl. Opt. 36, 1610-1614 (1997)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-36-7-1610


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References

  1. W. M. Trott, K. D. Meeks, “High power Nd:glass laser transmission through optical fibers and its use in acceleration of thin foil targets,” Appl. Phys. 67, 3297–3301 (1990). [CrossRef]
  2. Daoning Su, A. A. P. Boechat, J. D. C. Jones, “Beam delivery by large-core fibers: effect of launching conditions on near-field output profile,” Appl. Opt. 31, 5816–5821 (1992). [CrossRef] [PubMed]
  3. S. W. Allison, G. T. Gillies, D. W. Magnuson, T. S. Pagano, “Pulsed laser damage to optical fibers,” Appl. Opt. 32, 291–297 (1993).
  4. N. Bloembergen, “Laser-induced electric breakdown in solids,” IEEE J. Quantum Electron QE-10, 375–386 (1974). [CrossRef]

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