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Fig. 7 | Journal of the European Optical Society-Rapid Publications

Fig. 7

From: Autocompensating measurement-device-independent quantum cryptography in space division multiplexing optical fibers

Fig. 7

OFD device for codirectional modes. Light comes from the two cores of a MCF and is directed, via, for example, photonic lanterns, to a pair of parallel single-mode fibers. In one of them, an optic fiber delay is placed, introducing a delay τ in one of the modes. Photons exit the SMFs through another PL and they are introduced back into the cores of an MCF

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