Fiber-optic-bundle delivery system for high peak power laser particle image velocimetry illumination

We demonstrate the design and implementation of a fiber‐optic‐bundle beam delivery system for particle image velocimetry (PIV) applications. The system is designed for the transmission of high peak power pulses (≳20 mJ) from a Q‐switched and frequency doubled Nd:YAG laser. A fiber bundle offers advantages over a single fiber in beam delivery systems for light sheet formation. The damage‐limit‐maximum power that can be transmitted is greater for the bundle than for any of its component fibers, and the quality of the derived light sheet is higher than that obtainable from a single large core fiber of power handling capacity equivalent to that of the bundle. The beam delivery system was demonstrated in PIV measurements on a premixed propane‐air flame.

[1]  D. A. Jackson,et al.  A high-power fiber optic laser Doppler velocimeter , 1984 .

[2]  J.-P. Prenel,et al.  Three-dimensional flow analysis by means of sequential and volumic laser sheet illumination , 1989 .

[3]  D. W. Magnuson,et al.  Pulsed laser damage to optical fibers. , 1985, Applied optics.

[4]  Juergen Kompenhans,et al.  Application of PIV technique to transonic flows in a blow-down wind tunnel , 1993, Optics & Photonics.

[5]  G. T. Reid,et al.  Interferogram Analysis: Digital Fringe Pattern Measurement Techniques , 1994 .

[6]  J. Eaton,et al.  Development of a portable laser sheet , 1987 .

[7]  J. Jones,et al.  Beam delivery by large-core fibers: effect of launching conditions on near-field output profile. , 1992, Applied optics.

[8]  M. Kennedy.  Some Aspects of Seeding Flames with Refractory Oxide Particles , 1982 .

[9]  R. Adrian,et al.  Pulsed laser technique application to liquid and gaseous flows and the scattering power of seed materials. , 1985, Applied optics.

[10]  Larry D. Merkle,et al.  Laser‐induced bulk damage in SiO2 at 1.064, 0.532, and 0.355 μm , 1984 .

[11]  C. Greated,et al.  An optical fibre delivery system for pulsed laser particle image velocimetry illumination , 1995 .

[12]  I. M. Kennedy,et al.  An improved seeding method for high temperature laser doppler velocimetry , 1977 .

[13]  R. J. Adrian.  Laser anemometry in fluid mechanics : selected papers from the first International Symposium on Applications of Laser-Doppler Anemometry to Fluid Mechanics, Lisbon, Portugal, July 1982 , 1984 .