空芯光子晶体光纤的塌缩及选择性液体填充

Fabrication of selective injection microstructured optical fibers

研究了一种空芯光子晶体光纤(HC-PCF)的微孔塌缩特性,所用设备为传统光纤熔接机,对塌缩后的光纤实现了液体的选择性填充。并通过有限元法仿真分析了该空芯光纤在液体填充前后的基本参数:有效折射率、模场有效面积、数值孔径。通过仿真对比发现空芯光纤在中心孔选择性液体填充后非线性效应增大;通过实验得出了最佳光纤塌缩参数为光纤端面距离放电中心距离为50μm,放电时间800ms,放电强度为15.5mA。

Using a conventional fusion splicer,the collapse property of the hollow core photonic crystal fiber is investigated.With the splicer,the central hollow-core and the holes in the cladding region are selectively infiltrated.The basic parameters,including effective refractive index,effective area of mode field and numerical aperture of the hollow fiber before and after liquid filling are simulated and analyzed by finite element method.The simulation results show that the nonlinearity of hollow fiber increases after selective liquid filling in the central hole.The optimum parameters of collapse parameters are obtained by experiments:the distance between the end face of the fiber and the discharge center is 50 μm,the discharge time is 800 ms,and the discharge intensity is 15.5 mA.