Making and identifying optical superposition of very high orbital angular momenta

Abstract

We report the experimental preparation of optical superpositions of high orbital angular momenta(OAM). Our method is based on the use of spatial light modulator to modify the standard Laguerre-Gaussian beams to bear excessive phase helices. We demonstrate the surprising performance of a traditional Mach-Zehnder interferometer with one inserted Dove prism to identify these superposed twisted lights, where the high OAM numbers as well as their possible superpositions can be inferred directly from the interfered bright multiring lattices. The possibility of present scheme working at photon-count level is also shown using an electron multiplier CCD camera. Our results hold promise in high-dimensional quantum information applications when high quanta are beneficial.

Submitted for publication consideration (4 figures)

References in corpus (6)

• Optical spin-to-orbital angular momentum conversion in inhomogeneous anisotropic media
• Quantum Entanglement of High Angular Momenta
• Optical ferris wheel for ultracold atoms
• Imaging high-dimensional spatial entanglement with a camera
• EPR-based ghost imaging using a single-photon-sensitive camera
• Real-Time Imaging of Quantum Entanglement

Cited by in corpus (4)

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• One-time measurement to characterize complex amplitude single component in symmetry superposed optical vortices