CO2激光熔拉锥过程光功率控制研究-Core.PDF

14 3 Vol. 14 No. 3 2006 6 Optics and Precision Engineering Jun. 2006 1004-924X( 2006) 03-036 -04 CO2 1, 2 1 3 刘丽飒 , 张 磊 , 蔡志平 ( 1. 厦门大学 物理系, 福建厦门361005; 2. 南开大学 物理学院, 天津300071; 3. 厦门大学 电子工程系, 福建厦门361005) : CO , M ie 2 , Grellier , , , 2~ 3 m , : 激光加工; 熔锥光纤; M ie 散射; 激光能量; 热平衡 : T N249 :A CO2 laser fabrication of biconica-l tapered fiber and its laser power controlling 1, 2 1 3 LIU L-i sa , ZHA NG Lei , CAI Zh-i ping ( 1. Dep artment of Physics , X iamen Univ ersity , X iamen 361005, China; 2. College of Physics , N ankai University , Tianj in 300071, China; 3. Dep ar tment of Electr onic Engineer ing, X iamen Univ ersity , X iamen 361005, China 2 Abstract: Based on CO laser fabrication of fused-fiber taper rig developed by E. D. T imothy in 1999, a shorter focused lens w as used to improve the laser pow er controlling in the paper. T he M ie theory of cylindrical structures and the heat transfer modeling proposed by A.J. C. Grellier w as used to derive the increment relation of the laser pow er w ith the draw bench distance. T he relation w as in section in- crease linearly by degrees for laser pow er controlling, w hich simplifies the computer control of the rig. T he fused biconical-tapered fibers w ith 2 ~ 3 m diameter in the w aist w ere obtained in the experiment, it indicates the size and shape of biconica-l tapered fiber is consistent with the predicted one w ell. Key words: laser processing; fiber taper ; M ie scattering; laser energy; heat balance