Correlation-induced orbital angular momentum changes
@article{Zhang2020CorrelationinducedOA, title={Correlation-induced orbital angular momentum changes}, author={Yongtao Zhang and Olga Korotkova and Yangjian Cai and Greg Gbur}, journal={arXiv: Optics}, year={2020} }
We demonstrate that the orbital angular momentum flux density of a paraxial light beam can change on propagation in free space. These changes are entirely due to the spatial coherence state of the source, and the effect is analogous to correlation-induced changes in the intensity, spectrum and polarization of a beam. The use of the source coherence state to control the width, shape, and transverse shifts of the OAM flux density is demonstrated with numerical examples.
6 Citations
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References
SHOWING 1-10 OF 28 REFERENCES
Orbital angular momentum of light and the transformation of Laguerre-Gaussian laser modes.
- PhysicsPhysical review. A, Atomic, molecular, and optical physics
- 1992
Laser light with a Laguerre-Gaussian amplitude distribution is found to have a well-defined orbital angular momentum. An astigmatic optical system may be used to transform a high-order…
Mechanical equivalence of spin and orbital angular momentum of light: an optical spanner.
- PhysicsOptics letters
- 1997
It is shown that the spin angular momentum of +/-?per photon associated with circularly polarized light can add to, or subtract from, the orbital angular momentum to give a total angular momentum.
Changes in the state of polarization of a random electromagnetic beam on propagation
- Physics, Mathematics
- 2005
Free-space information transfer using light beams carrying orbital angular momentum.
- PhysicsOptics express
- 2004
The transfer of information encoded as orbital angular momentum states of a light beam is demonstrated, which is resistant to eavesdropping and gives an experimental insight into the effects of aperturing and misalignment of the beam on the OAM measurement and demonstrates the uncertainty relationship for OAM.
Invariance of the spectrum of light on propagation.
- Physics
- 1986
The question is raised as to whether the normalized spectrum of light remains unchanged on propagation through free space. It is shown that for sources of a certain class that includes the usual…
Changes in the spectrum of a partially coherent light beam propagating in free space
- Physics
- 1988
The effect of spatial coherence of a source on the spectrum of the emitted light is studied for a class of beamlike fields. The source is assumed to be planar, secondary, and quasi-homogeneous. We…
Coherence vortices in partially coherent beams
- Physics
- 2003
It is demonstrated that the spectral degree of coherence of a partially coherent beam may possess isolated pairs of points at which its phase is singular, and that in the neighborhood of these points…
Is complete spatial coherence necessary for the generation of highly directional light beams?
- PhysicsOptics letters
- 1978
An equivalence theorem is formulated that provides conditions under which planar sources of different states of spatial coherence will generate optical fields that have identical far-zone intensity…
Phase structuring of the complex degree of coherence.
- PhysicsOptics letters
- 2018
A geometrical representation, termed coherence curve, for the complex coherence state of a 1D, Schell-like source with non-trivial magnitude and phase distributions by means of a parametric curve confined to the unit circle in a complex plane is introduced.