轨道角动量传输光纤的研究进展

Research Progress of Optical Fiber with Orbital Angular Momentum Transmission

摘要:

自Allen等1992年首次理论确认了光子轨道角动量的物理概念和内涵以来，带有轨道角动量(Orbital Angular Momentum, OAM)的光束为空分复用(Space Division Multiplexing, SDM)带来一个新的研究方向，将其与光纤通信系统结合能很好地解决通信容量和速率问题。近些年传输带有轨道角动量光束的光纤在设计上逐步实现了OAM模式传输更稳定、传输距离更长，以及支持传输的OAM模式数更多等特点。文中从光纤的模式叠加的理论出发，主要分析了传输带有轨道角动量光束光纤的研究现状，包括基于传统光纤而设计的环状光纤，以及基于光子晶体光纤而设计圆形光子晶体光纤等，比较分析了各种不同类型光纤的研究成果、优缺点以及适合的应用场景。最后对传输带轨道角动量光束光纤的发展前景做了进一步的展望。

Abstract:

Since Allen et al confirmed the physical concept and connotation of photon orbital angular momentum(OAM) theoretically for the first time in 1992, beam with OAM brings a new thought for space division multiplexing (SDM), combining it with the optical fiber communication system can solve the problem of communication capacity and speed. In recent years, optical fibers with orbital angular momentum beams have been designed to gradually realize the characteristics of more stable OAM mode transmission, longer transmission distance, and more OAM modes that support transmission. Starting from the theory of mode superposition of optical fibers, this article mainly analyzes the current research status of fibers used to transmit orbital angular momentum beams, including ring fibers designed based on traditional fibers and circular photonic crystal fibers based on photonic crystal fibers, and so on, The research results, advantages and disadvantages and suitable application scenarios of different types of optical fibers are compared and analyzed. Finally, the development prospects of optical fibers with orbital angular momentum beams are further prospected.