title: Multiplexing free-space optical signals using superimposed collinear orbital angular momentum states.
abstract: 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.
authors.affiliation: Photonics Research Centre, Nanyang Technological University, Singapore, Singapore.
authors.forename: J
authors.initials: J
authors.lastname: Lin
authors.forename: X-C
authors.initials: XC
authors.lastname: Yuan
authors.forename: S H
authors.initials: SH
authors.lastname: Tao
authors.forename: R E
authors.initials: RE
authors.lastname: Burge