Optimum of model of dual-core photonic crystal fiber coupler
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Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, Anhui University, Hefei 230039, China
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Received Date:
2008-04-21
Accepted Date:
2008-05-05
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Abstract
In order to improve coupling character of dual-core photonic crystal fiber coupler,optimum models of dual-core photonic crystal fiber coupler were obtained by changing the structure and the refractive index of the air hole between both cores.Based on beam propagation method,the effect of the dimension of air hole between the cores and the refractive index of the injected material on the coupling property of the dual-core photonic crystal fiber coupler was analyzed by numerical calculation.Results of numerical calculation showed that the loss coefficient of the fiber maintained constant because the whole stmcture of the fiber kept unchanged.No matter the air hole between both cores decreased or the refractive index increased,the coupling length became shorter,the difference between coupling length for both polarized light became smaller and the loss became lower.Furthermore,it was easy to modulate the coupling character for the refractive index in the air hole between both cores was easy to adjusted.This method provides theoretical support for the optimum design of the models of dual-core photonic crystal fiber
coupler.
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