各向异性材料包层光纤Bragg光栅的反射谱  

Reflectivity spectra of fiber Bragg gratings with anisotropic crystal material cladding

作　　者：侯尚林[1] 李鸿伯[1] 黎锁平[1] 王道斌[1] 雷景丽[1] 

机构地区：[1]兰州理工大学理学院

出　　处：《量子电子学报》2008年第5期625-629,共5页Chinese Journal of Quantum Electronics

基　　金：国家重点基础研究发展计划“973”资助项目(2003CB314960);甘肃省自然科学基金项目(3ZS062-B25-036);甘肃省教育厅项目(0703-10);兰州理工大学优秀青年教师培养计划资助项目

摘　　要：应用数值解法对包层为单轴晶体材料且其光轴平行于光纤轴的光纤功率限制因子进行了理论模拟,并从模式特性出发解释了k_(cl)对该类光纤Bragg光栅的反射率的影响。计算结果表明:对于HE_(11)模,各向同性材料包层光纤中的能量比单轴晶体材料包层光纤中的能量更容易集中在纤芯中传输,而且集中程度与k_(cl)的取值有关;各向异性材料包层比各向同性材料包层的光纤Bragg光栅的反射率要高;此类光纤Bragg光栅的反射率主要是由光纤纤芯和包层中能量分布决定的。The power confinement factor of the fiber with cladding made of uniaxial crystal material whose optical axis is parallel to the axis of fiber was investigated by means of numeric solution and the influence of kc1 on the refiectivity of this kind of fiber Bragg gratings was physically interpreted with mode characteristics. The calculated results indicate that for HEll mode, more power is transmitted by the core of the fiber with cladding made of isotropic material than that with cladding made of uniaxial crystal material and the degree is dependent on the parameter kc1, the reflectivity of the fiber Bragg grating with cladding made of uniaxial crystal material is much higher than that with cladding made of isotropic material, the reflectivity of this kind of fiber Bragg grating is greatly influenced by the energy distribution between the core and the cladding of this kind of the fiber.

关 键 词：纤维与波导光学 功率限制因子 光纤Bragg光栅 单轴晶体材料 反射率 

分 类 号：TN253[电子电信—物理电子学] TN012