14 January 2008 Broadband directional coupler based on dual core PCF
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Proceedings Volume 6781, Passive Components and Fiber-based Devices IV; 678149 (2008) https://doi.org/10.1117/12.743352
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China
The depressed-index dual core PCF-based broadband directional coupler is designed by using semivectorial finite difference method. We study the influence of the structural parameters on the coupling characteristics in the dual core PCF. The results show that once the structural parameter of the cladding of the dual core PCF and the doping degree in the dual core region are optimised, the broadband coupling can be realised: in the wavelength range of 1.22~1.65μm, the value of the coupling length is stabilized at 26637nm±235nm and when the couplers are designed as two kinds of couple with coupling ratio of 50% and 10%, the coupling ratios of (50±0.702)% and (10±0.664)% are realized, respectively.
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Ridan Zhu, Ridan Zhu, Aiping Luo, Aiping Luo, Wencheng Xu, Wencheng Xu, Xude Wang, Xude Wang, } "Broadband directional coupler based on dual core PCF", Proc. SPIE 6781, Passive Components and Fiber-based Devices IV, 678149 (14 January 2008); doi: 10.1117/12.743352; https://doi.org/10.1117/12.743352

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