Flow Patterns in an Optical Channel

  • M. Vaupel
  • C. O. Weiss


It is known that any type of Schroedinger equation can be transformed by means of the Madelung-transformation1 into a set of hydrodynamic equations for the density and the momentum of a fluid. For a class-A-laser a kind of Navier-Stokes equation is obtained from the laser-Ginzburg-Landau equation by the Madelung-transformation2 . Our aim is to give experimental evidence for the hydrodynamic interpretation of laserdynamics. Because of the comparably slow dynamics of a photorefractive oscillator (PRO) in comparison with a class-A-laser, a PRO which is largely equivalent to a class-A-laser3 is used in the experiments. The set-up was described in a recent publication4 where the observation of stationary and circling optical vortices in a PRO with spherical optics was discussed. The velocity field, obtained from the optical wave corresponding to circling optical vortices, is very similar to the velocity field of the Taylor-Couette flow in a real fluid. Hence this is the first experimental example for laser-hydrodynamics.


Velocity Field Real Fluid Vortex Street Optical Vortex Schroedinger Equation 
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    K. Staliunas, Laser Ginzburg-Landau equation and laser hydrodynamics. Phys. Rev. A 48: 1573 (1993)Google Scholar
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    K.Staliunas, M.F.H. Tarroja, G. Slckys and C.O. Weiss, Analogy between photorefractive oscillators and class-A lasers, Phys. Rev. A 51: 4140 (1995)Google Scholar
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    M.Vaupel and C.O. Weiss. Circling optical vortices, Phys. Rev. A 51: 4078 (1995)Google Scholar
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    K. Staliunas. M. Vaupel and C.O.Weiss, Transverse patterns in lasers of “channel” configuration, submitted to Phys. Rev. AGoogle Scholar
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    P.K. Jakobsen, J.V. Moloney, A.C. Newell and R. Indik, Phys. Rev. A 45: 8129 (1992)Google Scholar

Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • M. Vaupel
    • 1
  • C. O. Weiss
    • 1
  1. 1.Physikalisch-Technische BundesanstaltBraunschweigGermany

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