Resumen
We propose a method for identifying orbital angular momentum (OAM) states within a vortex superposition using a Shack-Hartmann (SH) sensor as a spatial-diversity detector. We define a local OAM at every pixel of the SH image, from which we construct an OAM spectrum. The topological charges are determined fromtheOAMspectrum using a low-complexity algorithm, resulting in estimates that are robust to beam wandering. Data from a 200 m experimental transmission are successfully tested using the proposed technique.
Idioma original | Inglés |
---|---|
Páginas (desde-hasta) | 5534-5537 |
Número de páginas | 4 |
Publicación | Optics Letters |
Volumen | 45 |
N.º | 19 |
DOI | |
Estado | Publicada - 30 sep. 2020 |
Nota bibliográfica
Publisher Copyright:© 2020 Optical Society of America.
Palabras clave
- Low complexity algorithm
- Optical vortices
- Orbital angular momentum
- Shack-Hartmann sensor
- Signal modulations
- Spatial diversity
- Topological charges