Diagnostics of the topological charge of optical vortex by a phase-diffractive element
| Autor: | Tonglu Wang, Chunqing Gao, Shiyao Fu, Yan Gao |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Diffraction business.industry Uniform theory of diffraction Physics::Optics Acousto-optics 02 engineering and technology Fraunhofer diffraction Dynamical theory of diffraction Diffraction efficiency 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics symbols.namesake 020210 optoelectronics & photonics Optics 0103 physical sciences 0202 electrical engineering electronic engineering information engineering symbols Electrical and Electronic Engineering business Optical vortex Fresnel diffraction |
| Zdroj: | Chinese Optics Letters. 14:080501-80505 |
| ISSN: | 1671-7694 |
| DOI: | 10.3788/col201614.080501 |
| Popis: | A phase-diffractive optical element is designed to measure the topological charge of optical vortices. We use the scalar diffraction theory to calculate the far-field diffraction patterns. The simulation results show that almost all of the power of the incident beams is diffracted to the same diffraction order, and this approach is also effective for multi-ring optical vortices. We upload this phase-diffractive optical element on the liquid crystal spatial light modulator to do the experiment. The observed far-field diffraction patterns fit well with the simulation results. |
| Databáze: | OpenAIRE |
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