CO_2激光加热硅芯光纤预制棒的温场分布  

Temperature distribution of preform in drawing silicon core optical fiber with CO_2 laser heating

作　　者：何婷[1] 赵子文[1] 程雪丽[1] 陈娜[1] 王廷云[1] 

机构地区：[1]上海大学特种光纤与光接入网省部共建重点实验室培育基地,上海200072

出　　处：《强激光与粒子束》2016年第9期30-35,共6页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(61475096);国家自然科学基金仪器专项(61227012);国家自然科学基金青年基金项目(61505103)

摘　　要：研究了10.6μm CO2激光加热硅芯光纤预制棒的温场分布,在考虑预制棒表面热辐射和空气对流的情况下,用有限元软件COMSOL Multiphysics建立了激光加热预制棒的传热物理模型,比较了激光功率、激光光斑半径和预制棒直径对温场分布的影响,同时提出CO2激光加热与石墨炉加热结合调节温场分布的方法。仿真结果显示,激光参数和预制棒直径都会明显影响预制棒温场分布,且激光光斑半径3mm,功率达到400 W的激光器可用于直径10mm内的硅芯光纤预制棒制备硅芯光纤。通过CO2激光加热和石墨炉加热相结合的加热方式,能更加灵活有效地调节预制棒的温场分布,构建适合硅芯光纤拉丝的温场条件。This paper presents a physical model about the temperature distribution of a silicon preform exposed to a 10.6 μm CO 2 laser in consideration of air convection and environmental radiation heat transfer.In the meantime,an approach of heating the preform by the laser combining with graphite furnace is suggested.Simulation results show that the temperature distribution is strongly dependent on the parameters of the CO 2 laser and the preform,and laser heating is appropriate for preform with diameter less than 10 mm when the laser spot radius is 3 mm and laser power is 400 W.Heating combining with graphite furnace can mod-ulate the temperature gradient effectively and build the correct temperature field for silicon core fiber drawing.

关 键 词：CO2激光 激光功率 光斑半径 预制棒直径 石墨炉加热 温场分布 

分 类 号：TN241[电子电信—物理电子学]