Broadband directional coupler based on asymmetric dual-core photonic crystal fiber

• 作 者: 陈明阳 张永康 祝远锋 佟艳群 周骏
• 机 构: Department of Optical Engineering, School of Mechanical Engineering, Jiangsu University,Faculty of S
• 出 处: 中国激光
• 发表日期: 2009年03期
• 关键词: directional photonic coupler asymmetric derivation enlargement length normalized

A novel broadband directional coupler based on an asymmetric dual-core photonic crystal fiber (PCF) isproposed.The asymmetry in the fiber is introduced by the enlargement of one air-hole in dual-core PCF.Numericalinvestigation demonstrate that broadband directional coupling with spectral width as large as 370 nm and polarization-dependentloss and uniformity lower than 0.2 and 0.5 dB,respectively,can be achieved.In addition,the proposedfiber shows large tolerance to the variation of the fiber parameters.In particular,the fiber length allows at least 10%derivation from the proposed fiber length of 7.7 mm.

A novel broadband directional coupler based on an asymmetric dual-core photonic crystal fiber (PCF) isproposed. Asymmetry in the fiber is introduced by the enlargement of one air-hole in dual-core PCF. Numerical investigation of that broadband directional coupling with spectral width as large as 370 nm and polarization-dependent loss and uniformity lower than 0.2 and 0.5 dB, respectively, can be achieved. In addition, the proposedfiber shows large tolerance to the variation of the fiber parameters.In particular, the fiber length allows at least 10 % derivation from the proposed fiber length of 7.7 mm.