Asynchronous transfer of individually addressable optical channels   through a multimode fiber using phase conjugation
  Multimode fibers are attractive for a variety of applications such as internet data transfer, data center hubs, micromanipulation, optogenetics and other biomedical applications. A major hurdle for imaging through multimode fibers is the occurring scrambling, resulting in a randomization of light. Recently, clear imaging has been successfully accomplished using wavefront shaping, but the spatial information was transferred synchronously only. We demonstrate asynchronous information transmission using individual phase conjugations by employing only one spatial light modulator with multiple windows. Our findings pave the way towards individual signal transfer inside strongly scattering media. 
Jueurgen W. Czarske, Daniel Haufe, Nektarios Koukourakis, Lars   Buettner
physics.optics