Confidential optical data transmission through multimode fibres based on holographic transmission matrix measurements

Stefan Rothe; Karl-Ludwig Besser; Nektarios Koukourakis; Eduard Jorswieck; Jürgen W. Czarske

doi:10.1117/12.2620317

20 May 2022 Confidential optical data transmission through multimode fibres based on holographic transmission matrix measurements

Stefan Rothe, Karl-Ludwig Besser, Nektarios Koukourakis, Eduard Jorswieck, Jürgen W. Czarske

Author Affiliations +

Proceedings Volume PC12136, Unconventional Optical Imaging III; PC1213608 (2022) https://doi.org/10.1117/12.2620317
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

Holographic transmission matrix measurements of optical multimode fibre communication channels enable optical precoding on the transmitter-side exploiting the physical layer. This approach can achieve a crucial SNR advantage for legitimate communication participants over illegitamte ones, such as an eavesdropper. We present measurements on a 55-mode fibre channel including transmitter Alice and receiver Bob, to which an eavesdropper Eve is physically coupled. Alice performs a programmable optical precoding through an SLM based on singular value decomposition enabling space division multiplexing. Demonstration of confidential data transmission is based on measurements from both channels Alice/Bob and Alice/Eve, which are used for determining the achievable amount of securely exchanged data between Alice and Bob, i.e. secrecy rate. Results are shown on step-index fibres of up to 100 m length.

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Citation Download Citation

Stefan Rothe, Karl-Ludwig Besser, Nektarios Koukourakis, Eduard Jorswieck, and Jürgen W. Czarske "Confidential optical data transmission through multimode fibres based on holographic transmission matrix measurements", Proc. SPIE PC12136, Unconventional Optical Imaging III, PC1213608 (20 May 2022); https://doi.org/10.1117/12.2620317

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