激光与光电子学进展, 2017, 54 (2): 020602, 网络出版: 2017-02-10
基于二维光子晶体三模式模分复用/解复用器的设计与性能分析
Design and Performance Analysis of Three-Mode Division Multi/Demultiplexer Based on Two-Dimensional Photonic Crystals
光通信 光子晶体 模分复用/解复用 模式转换 optical communications photonic crystal mode division multi/demultiplexing mode conversion
摘要
提出了一种1550 nm波长的二维正方晶格光子晶体三模式模分复用/解复用器。该器件由两个非对称定向耦合结构组成, 可以实现TE0、TE1和TE2模式的模分复用与解复用。同时为了防止波导耦合处的模式失配问题, 波导耦合处采用了渐变结构。利用时域有限差分法和平面波展开法对其性能进行分析, 结果表明: 该器件在1550 nm波长TE0、TE1和TE2模式的模分复用/解复用的插入损耗低于0.14 dB, 信道串扰低于-20 dB。
Abstract
A three-mode division multiplexer and demultiplexer based on two-dimensional square-lattlie photonic crystal with wavelength of 1550 nm was designed. Two asymmetrical directional couplers are included, which can achieve modes conversion function of TE0, TE1 and TE2 modes. In order to avoid phase mismatching in bus waveguide, taper structure is applied at waveguide junction which can reduce the insertion loss effectively. Plane waves method and finite difference time domain methods are used to simulate the performance. Numerical simulations show that the designed device has the potential for high-capacity mode division multiplexing optical communication systems with insertion loss less than 0.14 dB and mode crosstalk less than -20 dB.
付培栋, 陈鹤鸣. 基于二维光子晶体三模式模分复用/解复用器的设计与性能分析[J]. 激光与光电子学进展, 2017, 54(2): 020602. Fu Peidong, Chen Heming. Design and Performance Analysis of Three-Mode Division Multi/Demultiplexer Based on Two-Dimensional Photonic Crystals[J]. Laser & Optoelectronics Progress, 2017, 54(2): 020602.