A 1x4 power-splitter based on photonic crystal Y-splitter and directional couplers

Abstract

ABSTRACT:A 1×4 photonic crystal power splitter operating in the optical communication window is demonstrated by plane-wave expansion and finite-difference time-domain simulations. The device consists of one Y-junction and two directional couplers. Double 60º bends are formed at the exit of directional couplers to prevent crosstalk. The Y-junction, double bends and coupling holes at the directional couplers are optimized to increase the transmission efficiency at the output ports. The simulation results exhibit almost equal power splitting with low loss characteristic. The investigated design shows potential for optical switching and routing applications in optical communications.

Performance analysis of a modal converter based on an asymmetric dual-core photonic crystal fiber

“…The coupling length was estimated using equation (1). It is defined as the distance necessary to transfer all the energy from one core to the other one [21].…”

Design and research of a broadband mode division multiplexer based on three core photonic crystal fiber

“…十分有利 [10,11] ，近年来也备受关注。文献 [12] 提出了一种可调谐的磁性流体填充的混合光 子晶体光纤模式转换器， 该转换器可以将折射率引导芯中的 LP11 模式转换为光子带隙引 导芯中的 LP01 模式。仿真结果显示，该器件在 1.33μm-1.85μm 和 1.38μm-1.75μm 的波长 范围内，耦合效率可分别达到-0.457dB 和-0.222dB。文献 [13] 提出了一种基于非对称双芯 光子晶体光纤的可调谐模式转换器，该器件在双芯间的气孔中添加了液晶材料，利用双 芯间的液晶材料的热光可调特性控制模式转换器的工作波长。在执行 LP01 与 LP11 之间 的模式转换时，所提出的器件在 1278nm-1317nm 的宽波长范围内显示出高转换效率。 文献 [14] 的一个纤芯转移到另外一个纤芯所需要的传输距离，可表示为 [20] ：…”