双周期Bragg光纤的研究

Research of the double-period Bragg fiber

本文在常规Bragg光纤结构的基础上提出一种双周期Bragg光纤,它的包层是由两个具有不同周期性结构的内外包层组成。利用传输矩阵法和渐进矩阵法相结合的方法,通过数值计算,理论分析了这种双周期Bragg光纤的损耗和波导色散特性.结果表明,它的泄露损耗随波长变化规律不同于常规Bragg光纤,而内包层的结构对波导色散有较大影响。

Based on the conventional Bragg fiber,a double-period Bragg fiber whose inner and outer cladding is consisted of different periodicity is introduced here.The waveguide dispersion and loss properties of the fiber are investigated via the combining the transfer matrix method with asymptotic matrix method.The results show that the loss changing with the wavelength is different from the conventional Bragg fiber,and the structure of the inner cladding has a stronginfluence on the waveguide dispersion.