Journal
OPTICS EXPRESS
Volume 24, Issue 13, Pages 13800-13811Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.24.013800
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Funding
- National Fundamental Research Program of China [2011CBA00200]
- National Natural Science Foundation of China [11174271, 61275115, 61435011, 61525504]
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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. (C)2016 Optical Society of America
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