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Optik

Four entangled photons generation using weak light and an all fiber optic scheme for multi-entangled photons generation

Preecha P. Yupapin, Chatchawal Sripakdee

Published Mar 6, 2008• 2 citations
Publisher
DOI
10.1016/j.ijleo.2007.10.011

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We propose a new system for multi-entangled photons generation using an all fiber optic arrangement. The generation of the entangled states of two, four and eight entangled photons using an all fiber optic scheme is analyzed. The timing-walk off on the entangled state of two and four entangled photons suffering from the polarization in fiber optic is characterized. The compensation of such effects and the optimal entangled states of the entangled photons in fiber optic are analyzed and discussed.
Spatial division multiplexing is a key technology for increasing the capacity of the classical optical fiber networks. It also provides additional degrees of freedom for photon entanglement and transmission in quantum communication networks. This paper describes steps toward generating a four-dimensional, spatially-entangled state and its distribution over multi-km-long four-core fibers. We generate four mutually coherent beams using a spatial light modulator and investigate their simultaneous coupling into a four-core fiber. We also verify the stability of both the relative phase and polarization between the cores over a 10 km of a four-core fiber.
Spatial-division multiplexing is a key technology for increasing the capacity of classical optical fiber networks. It also provides additional degrees of freedom for photon entanglement and transmission in quantum communication networks. This paper describes steps toward generating a four-dimensional, spatially-entangled state and its distribution over multi-km-long four-core fibers. We generate four mutually coherent beams using a spatial light modulator and investigate their simultaneous coupling into a four-core fiber. We verify the stability of both the relative phase and polarization between the cores over10 km\mathbf{1 0 ~ k m}10 kmof a four-core fiber. We also characterize the polarization mode dispersion of the fiber and find its principal states of polarization to mitigate the effects of random polarization-dependent delay across the fiber cores.