Talbot self-imaging and two-photon interference in ring-core fibers

• URL: http://arxiv.org/abs/2109.08035v1
• Date: Thu, 16 Sep 2021 14:55:46 GMT
• Title: Talbot self-imaging and two-photon interference in ring-core fibers
• Authors: Matias Eriksson, Benjamin A. Stickler, Lea Kopf, Markus Hiekkam\"aki, Regina Gumenyuk, Yuri Chamorovskiy, Sven Ramelow, Robert Fickler
• Abstract summary: We report the experimental observation of the cylindrical Talbot carpet in weakly-guiding ring-core fibers for classical light fields. We show that the ring-core fiber acts as a high-order optical beamsplitter for single photons, whose output can be controlled by the relative phase between the input light fields.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Wave propagation on the surface of cylinders exhibits interferometric self imaging, much like the Talbot effect in the near-field diffraction at periodic gratings. We report the experimental observation of the cylindrical Talbot carpet in weakly-guiding ring-core fibers for classical light fields. We further show that the ring-core fiber acts as a high-order optical beamsplitter for single photons, whose output can be controlled by the relative phase between the input light fields. By also demonstrating high-quality two-photon interference between indistinguishable photons sent into the ring-core fiber, our findings open the door to applications in optical telecommunications as a compact beam multiplexer as well as in quantum information processing tasks as a scalable realization of a linear optical network.

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