| Autor: |
Alonso, Miguel A., Beckley, Amber M., Brown, Thomas G. |
| Zdroj: |
Proceedings of SPIE; August 2011, Vol. 8011 Issue: 1 p80111M-80111M-8, 721008p |
| Abstrakt: |
We describe an analytic formulation that describes the spatial behavior and propagation of a class of fully correlated beams that span the complete Poincar� sphere. The beams can be constructed from a superposition of a fundamental Gaussian mode and a spiral phase Laguerre-Gauss (LG) mode having orthogonal polarization. When the orthogonal polarizations are right and left circular, the coverage extends from one pole of the sphere to the other in such a way that concentric circles on the beam map onto parallels on the Poincar� sphere and radial lines map onto meridians. If the beam waists match, the beam propagation corresponds to a rigid rotation about the pole; a mismatch in beam waist size or position produces a beam in which parallels rotate at different rates with propagation distance. We describe an experimental example of how a symmetrically stressed window can produce these beams and show that the predicted rotation indeed occurs when moving through the focus of a paraxial Gaussian beam. We discuss nonparaxial behavior and end with a discussion of how the idea can be extended to include beams that not only cover the surface of the Poincar� sphere, but fill the volume within the sphere. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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