【摘要】 针对现有模式复用器的不足,根据有效折射率匹配效应,设计一种非对称平面光波导型模式复用/解复用器。波导结构由1个波导主臂和2个波导分支臂组成。研究了波导各项参数的确定准则,仿真分析了不同的波导底面宽度比对模式复用/解复用性能的影响,确定了最佳的波导底面宽度比,分析了基模和一阶模在波导中的传输过程和光场能量流动情况。结果表明:非对称平面光波导型模式复用/解复用器具有良好的模式复用和解复用性能,并且可以高效率地实现模式之间的转换,具有结构简单、模式转换效率较高、易于集成等优点。更多还原

【Abstract】 Aiming at the shortcomings of the existing multiplexers,apattern of the asymmetric planar waveguide type mode division multiplexer/demultiplexer is designed,based on the effective refractive index matching effect.Waveguide structure consists of a main boom and two waveguide branches.The parametric principle to design the asymmetric planar waveguide type mode division multiplexer/demultiplexer is discussed.The performance of mode multiplexing/de-multiplexing is simulated under different waveguide width ratios,and the best waveguide width ratio is determined.The transmission process and the light field energy flow processes of fundamental mode and first-order mode are analyzed.The simulation results show that the asymmetric planar waveguide type mode division multiplexer/demultiplexer has a good performance of mode division multiplexing/demultiplexing,and the mode conversion can be realized efficiently.The properties,such as simple structure,high mode conversion efficiency,easy integration,make it more suitable for mode division multiplexing communication.更多还原