2016/01/31 by Shuai Shi, Dong-Sheng Ding, Zhi-Yuan Zhou +4
Materials Science · Physics and Astronomy · #Angular momentum #Coherence (philosophical gambling strategy) #Coherence theory #Encoding (memory) #Gaussian #Light beam #Metamaterials and Metasurfaces Applications #Orbital Angular Momentum in Optics #Photon #Photonics #Quantum channel #Random lasers and scattering media #Superposition principle #physics.optics #quant-ph
paper · pdf · doi:10.1364/oe.24.013800
published as Optics Express 24, 13800-13811 (2016) · 10 pages, 7 figures
openalex publication_date 2016/06/13 · arxiv created 2016/06/16 · arxiv updated 2016/06/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Encoding information in light with orbital angular momentum (OAM) enables networks to increase channel capacity significantly. However, light in only the fundamental Gaussian mode is suitable for fibre transmission, and not higher order Laguerre Gaussian modes, which carry OAM. Therefore, building a bridge to interface light with OAM and Gaussian mode time-binning is crucially important. Here, we report the realization of a photonic transcoder, by which light with an arbitrary OAM superposition is experimentally converted into a time-bin Gaussian pulse, and vice versa. Furthermore, we clearly demonstrate that coherence is well conserved and there is no cross-talk between orthogonal modes. This photonic device is simple and can be built with scalable architecture. Our experimental demonstration paves the way towards a mixed optical communication in free-space and optical fibre.