Abstract
This paper proposes a 32-channel-hybrid-multiplexing system on atmospheric turbulence. With the utilization of the hybrid multiplexing of orbital angular momentum (OAM), polarization, and frequency, the communication speed of the system can be significantly improved, and this system can be well combined with the existing frequency division multiplexing (FDM) optical communication network. Within this communication system, we discuss the effects of different turbulence intensities on the phase, OAM crosstalk, spectrum, and bit error rate (BER) in turbulent channels. Under strong turbulence, 46.8% of the energy leaks to the neighbor OAM and become noise when multiple topological charge states are transmitted. The research reflects the impact of various parameters of the OAM hybrid multiplexing system under turbulence, which is closer to a practical application scenario and is significant for implementing OAM communication in the turbulence channel.
Highlights
The requirement of communication links with high data capacity is propelled by the exponential increase of data traffic [1]
Many multi-channel communication systems based on hybrid multiplexing have been proposed [1], such as the orbital angular momentum (OAM)-POL hybrid multiplexing system and the 26-OAM mode multiplexing system proposed by Jian Wang [7,8]
We propose a 32-channel-hybrid-multiplexing system that consists of OAM, polarization, and frequency division multiplexing (FDM) hybrid multiplexing [10,11]
Summary
The requirement of communication links with high data capacity is propelled by the exponential increase of data traffic [1]. Many multi-channel communication systems based on hybrid multiplexing have been proposed [1], such as the OAM-POL hybrid multiplexing system and the 26-OAM mode multiplexing system proposed by Jian Wang [7,8]. It has been proven that hybrid multiplexing can increase the transmission rate of communication systems [9]. We propose a 32-channel-hybrid-multiplexing system that consists of OAM, polarization, and frequency division multiplexing (FDM) hybrid multiplexing [10,11]. Compared with the above-mentioned OAM-POL multiplexing, the system adds a dimension (i.e., FDM), which enables the system to be well integrated with existing communication networks and achieves larger data capacity
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