Multiplexed vortex state array toward high-dimensional data multicasting

Abstract

Optical vortex array has drawn widespread attention since the boom of special applications such as molecular selecting and optical communication. Here, we propose an integrated phase-only scheme to generate multiple multiplexed vortex beams simultaneously, constituting a multiplexed vortex state array, where the spatial position, as well as the corresponding orbital angular momentum (OAM) spectrum, can be manipulated flexibly as desired. Proof-of-concept experiments are carried out and show a few different multiplexed vortex state arrays that fit well with the simulation. Moreover, regarding the array as a data-carrier, a one-to-many multicasting link through multi-state OAM shift keying, a high-dimensional data coding, is also available in free space. In the experiment, four various OAM states are employed and achieve four bits binary symbols, and finally distribute three different images to three separate receivers independently from the same transmitter, showing great potential in the future high-dimensional optical networks.

Orbital Angular Momentum Neural Communications for 1-to-40 Multicasting with 16-Ary Shift Keying

“…In order to improve the data capacity of the channel in OAM multicasting communication, a scheme based on a multiplexed vortex state array has been proposed. 24 It allows multiple OAM states to be generated simultaneously in different channels, which realizes efficient data distribution. However, as the number of multiplexing channels (i.e., the number of users) increases, the complexity of the spatial frequency distribution increases in this method.…”

“…Currently, 1-to-4 and 1-to-6 OAM multicasting have been reported. In order to improve the data capacity of the channel in OAM multicasting communication, a scheme based on a multiplexed vortex state array has been proposed . It allows multiple OAM states to be generated simultaneously in different channels, which realizes efficient data distribution.…”

Broadband 2D n × n Vortex Arrays Generated from an Efficient Petal‐Like Raman Laser with an Astigmatic Mode Convertor

“…Vortex beams with a helical wave front, phase singularity, and orbital angular momentum (OAM) [ 1,2 ] find potential applications in optical trapping, [ 3 ] optical communications, and [ 4 ] quantum entanglement. [ 5 ] Optical vortex arrays or vortex lattices are well‐arranged multiple vortices with each vortex possessing a phase singularity [ 6,7 ] or an OAM and [ 8,9 ] are extremely needed for information security, [ 10 ] automultiscopic 3D display, [ 11 ] multiple microparticle manipulation, [ 12 ] and multiparticle trapping. [ 13 ] Self‐healing property of optical vortex array [ 14 ] enables information security and capacity of free space communication.…”

Planar crossed-fork gratings with sinusoidal transmittance for eliminating high-order diffraction

“…Optical vortex arrays (OVAs), due to their ability to process data in parallel using spatial degrees of freedom, has recently seen notable applications in optical communication, 1 – 4 high-resolution far-field microscopy, 5 orbital angular momentum (OAM) multiplexing, 6 , 7 optical anti-counterfeiting, 8 , 9 and strong data encoding 10 – 14 Thus, considerable effort has been devoted to developing methods for realizing OVAs 15 …”