侧边抛磨多模光纤中光功率传输特性研究  

Investigations of optical power transmitting characteristics in sidepolished multimode fiber

作　　者：甘宏波 陈哲[1,2] 张军[1,2] 何小莉[1] 甘焕标 谢俊辛 唐洁媛[1,2] 罗云瀚[1,2] 余健辉[1,2] 

机构地区：[1]暨南大学理工学院光电工程系,广东广州510632 [2]暨南大学光电信息与传感技术广东普通高校重点实验室,广东广州510632

出　　处：《光电子．激光》2014年第3期447-453,共7页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61177075;11004086;61008057);广东省战略性新兴产业核心技术攻关(2012A032300016);中央高校基本科研业务费专项资金(11612437;11613405);广东高校优秀青年创新人才培养计划(LYM10024)资助项目

摘　　要：侧边抛磨多模光纤(SPMMF)与侧边抛磨单模光纤(SPSMF)相比,具有工艺上容易实现的优势。为了研制SPMMF传感器,分析SPMMF中光功率传输特性,首先利用有限差分光束传输法(BPM)模拟计算了不同剩余半径SPMMF中的光强、模场分布以及光纤中传输光功率与抛磨区覆盖材料折射率的关系,并进行了实验验证。实验结果与模拟结果相互吻合:当抛磨区覆盖材料折射率小于1.440时,光功率透过率接近在空气中的透过率;当覆盖材料的折射率逐渐增大到1.458时,光功率透过率减小到最小值,且最小值不小于0.001;当覆盖材料的折射率大于1.458时,光功率透过率由最小值逐渐增大,最终维持在一个相对稳定的值;不同剩余半径的SPMMF中的传输光功率透过率不同,剩余半径越小,SPMMF中传输光功率透过率越小。So SPMMF is easier to be implimented techanically compared with the side polished singlemode fiber. To develop side polished multimode fiber （SPMMF） sensor,the optical power transmitting charac- teristics in SPMMF are analyze＆ First we utilize BPM to simulate and calculate the distribution of light intensity and mode field in SPMMF with different remaining radii, and the relation between the transmit- ted light power in fiber and the index of refraction of cover material in polished area is derived as well. furthermore,we demonstrate our conclution with experiment. The results show that when the index of refraction of cover material in polished area is smaller than 1.44, the transmittance of light power in fiber is close to the transmittance in air~ When the index of refraction of cover material in polished area in- creases to 1. 458, the transmittance decreases to the minimum, and the minimum is not less than 0. 001; When the index of refraction of cover material in polished area is lager than 1. 458, the transmittance in- creases slowly and remains at a relatively stable value. The transmittance of the transmitted light power in SPMF will be affected by remaining radius. We conclute that the transmittance of the transmitted light power in SPMF is smaller as the remaining radius is smaller.

关 键 词：侧边抛磨光纤(SPF) 多模光纤(MMF) 光功率 剩余半径 折射率 

分 类 号：TN929.11[电子电信—通信与信息系统]