用于激光能量传输的大纤芯微结构光纤的设计及制备  

Design and fabrication of large-core micro-structured fiber for laser energy transmission

作　　者：曹蕾[1] 侯峙云[1] 周桂耀[1] 夏长明[1] 陈艳[1] 田云云[1] 

机构地区：[1]华南师范大学微纳光子功能材料与器件重点实验室,广东广州510006

出　　处：《光电子．激光》2014年第5期887-890,共4页Journal of Optoelectronics·Laser

基　　金：国家"973"计划(2013CB327604);国家自然基金(61377100)资助项目

摘　　要：设计和制备了一种传输高功率激光能量石英基质微结构光纤。光纤的外径为180μm,芯径为84μm,包层为双层空气孔。实验结果表明,对半导体激光的980nm和YAG激光的1 064nm波长的传输损耗分别为6dB/km和7dB/km,而最低损耗可达到1dB/km@935nm;在弯曲半径为0.25cm的条件下,弯曲的附加损耗为0.56dB/circle@980nm和0.416dB/circle@1 064nm;实验测得在980nm波长的实际模场面积为2 951.71μm2,与理论值2 951.4μm2相吻合。研制的光纤具有结构简单、柔软性好、易制备、低非线性、低损耗和高损坏阈值等特点,是高功率激光能量柔性传输系统的理想介质。The flexible transmission of the laser energy plays an important role in the development of la- sers. In this papers based on the advantage of flexible structure design and preparation of microstructure fibers,a kind of pure silica microstructure fiber used for the transmission of high power laser energy is designed. This kind of fiber has a cladding with double air holes＇and the external diameter of the fiber is 180μm with a core diameter of 84 μm Experiment measurements show＇that the transmission loss of the semiconductor laser operating at the wavelength of 980 nm is 6 dB/km and that of the YAG laser oper- ating at the wavelength of 1064 nm is 7 dB/km, and the lowest loss can reach 1 dB/km at the wave- length of 935 nm,When the bending radius of the fiber is about 0.25 cm,the additional bending losses are 0. 28 dB/circle and 0. 4 dB/circle at the wavelengths of 980 nm and 1064 nm,respectively. The actu- al mode field area is 2 951.71 μm2 at the wavelength of 980 nm,which is consistent with the theoretical value of 2 951.4 μm2. The results indicate that this kind PCF has the advantages of simple structure, easy preparation, good flexibility, low nonlinearity, low loss and high energy damage threshold. It can be an ideal medium in high power laser energy flexible transmission system.

关 键 词：微结构光纤 传能 低非线性 低损耗 

分 类 号：TN253[电子电信—物理电子学]