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Hybrid Angular Gradient Phase Grating for Measuring the Orbital Angular Momentum of Perfect Optical Vortex Beams
- Source :
- IEEE Photonics Journal, Vol 12, Iss 3, Pp 1-9 (2020)
- Publication Year :
- 2020
- Publisher :
- IEEE, 2020.
-
Abstract
- We propose an effective method to measure the orbital angular momentum of a perfect optical vortex (POV) beam with a hybrid angular gradient phase grating (HAG-PG), which is a gradient grating with angular changing distribution. The HAG-PG performs the transformation from the POV to the dark stripes of the diffraction intensity patterns. From the number and the orientation of dark stripes of far-field diffraction patterns formed by the HAG-PG, the modulus of TC and sign of the incident POV beam can be determined. The high scalability of this method for being unrestricted by the Fourier plane and its adaptation for measuring the POV beams with different states are demonstrated by loading the HAG-PG hologram on a spatial light modulator. And the detection sensitivity of the POV beam can be significantly improved. The experimental results agree well with the theoretical simulations.
- Subjects :
- Diffraction
lcsh:Applied optics. Photonics
Angular momentum
Holography
Physics::Optics
Phase grating
02 engineering and technology
Grating
01 natural sciences
law.invention
010309 optics
symbols.namesake
Optics
law
0103 physical sciences
lcsh:QC350-467
Electrical and Electronic Engineering
Physics
Spatial light modulator
business.industry
lcsh:TA1501-1820
perfect optical vortex
021001 nanoscience & nanotechnology
Atomic and Molecular Physics, and Optics
Fourier transform
symbols
0210 nano-technology
business
Optical vortex
Beam (structure)
lcsh:Optics. Light
Subjects
Details
- Language :
- English
- ISSN :
- 19430655
- Volume :
- 12
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- IEEE Photonics Journal
- Accession number :
- edsair.doi.dedup.....948c824739ba0242949267aaa2231477