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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 17 — Jun. 10, 2007
  • pp: 3432–3438

Optical fiber array for the delivery of high peak-power laser pulses for fluid flow measurements

Jonathan P. Parry, Jonathan D. Shephard, Martin J. Thomson, Mohammad R. Taghizadeh, Julian D. C. Jones, and Duncan P. Hand  »View Author Affiliations

Applied Optics, Vol. 46, Issue 17, pp. 3432-3438 (2007)

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Fiber delivery of 64.7 mJ laser pulses ( 6 ns duration) from a Q-switched Nd:YAG laser operating at 532 nm is demonstrated. A custom diffractive optical element was used to shape the laser beam and facilitate coupling into a linear fiber array. This launch arrangement achieves an improvement in launch efficiency compared with a circular fiber bundle evaluated in previous work and the delivery of higher pulse energies is demonstrated. The bundle is capable of delivering light of sufficient pulse energy and, importantly, with suitable focusability, to generate a thin light sheet for the fluid flow measurement technique of particle image velocimetry (PIV). Fiber delivery offers an advantage, in terms of optical access, for the application of PIV to enclosed measurement volumes, such as the cylinder of a combustion engine.

© 2007 Optical Society of America

OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(060.2310) Fiber optics and optical communications : Fiber optics
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.7250) Instrumentation, measurement, and metrology : Velocimetry

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: October 5, 2006
Revised Manuscript: January 16, 2007
Manuscript Accepted: February 6, 2007
Published: May 18, 2007

Jonathan P. Parry, Jonathan D. Shephard, Martin J. Thomson, Mohammad R. Taghizadeh, Julian D. C. Jones, and Duncan P. Hand, "Optical fiber array for the delivery of high peak-power laser pulses for fluid flow measurements," Appl. Opt. 46, 3432-3438 (2007)

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