Multiplexing free-space optical signals using superimposed collinear orbital angular momentum states.
As a proof of concept, we experimentally demonstrate multiplexing of free-space optical signals in multiple channels labeled with different states of orbital angular momentum. The multiplexing process is carried out by a dynamic liquid-crystal spatial light modulator, while the phase function is calculated by an iterative algorithm. A binary amplitude computer-generated hologram serves as a demultiplexer.
Lin
J
J
Photonics Research Centre, Nanyang Technological University, Singapore, Singapore.
Yuan
X-C
XC
Tao
S H
SH
Burge
R E
RE