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Orbital angular momentum symmetry in a driven optical parametric oscillator

R. B. Rodrigues, J. Gonzales, B. Pinheiro da Silva, J. A. O. Huguenin, M. Martinelli, R. Medeiros de Araújo, C. E. R. Souza, and A. Z. Khoury

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Abstract

We investigate the dynamics of a driven optical parametric oscillator under the injection of orbital angular momentum. The injected mode is adiabatically driven through arbitrary transformations on the Poincaré sphere of first-order paraxial beams. As a result, the down-converted beam conjugated to the seed is shown to follow a path imposed by a nontrivial symmetry on the Poincaré sphere. This symmetry allows controllable distinguishability between the spatial modes of the down-converted beams. In this Letter, we provide convincing experimental evidence of this effect.

© 2018 Optical Society of America

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