Secure Optical Communication Using Random Mode Mixing and Time-Reversal Symmetry in Multimode Fibers
Yaron Bromberg, Brandon Redding, Sébastien M. Popoff, Nissim Ofek, Hui W. Cao · 2014
We experimentally demonstrate an encryption method for transmission through multimode fibers. The encryption is provided by chaotic mode mixing, and time-reversal symmetry of counter-propagating light ensures that only an authorized party can decrypt the message.