非对称双芯光子晶体光纤特性分析

Research on the Characteristic of Unsymmetrical Dual-Core Photonic Crystal Fibers

设计一种新型非对称双芯光子晶体光纤模型,利用有限元法及其双芯光纤的耦合特性分析其光子晶体光纤的光学特性,数值模拟了非对称双芯光子晶体光纤的有效折射率、双折射、耦合系数在一定结构参数下随波长的变化特性.数值模拟结果表明,选择合适的结构参数可以得到较高的双折射特性以及耦合特性,因此光子晶体光纤的非对称结构的特性分析对于光学器件的研制有重要意义.

In this paper,a new unsymmetrical dual- core photonic crystal fiber model is designed,by using finite element method and its twin- core fiber coupling characteristics of the optical properties of the photonic crystal fiber. The variation of the wavelength of effective index of refraction, birefringence,coupling coefficient that unsymmetrical dual- core photonic crystal fiber with certain structural parameters are numarically simulated. The results show that the choice of appropriate structure parameters can obtain high birefringence characteristics and coupling characteristics. Therefore,the analysis of the characteristics of photonic crystal fiber with asymmetric structure has important implications for the development of optical devices.