全光纤VISAR系统中色散问题的研究  

Dispersion in Fiber Optic Velocity Interferometer System

作　　者：张小强[1] 周昕[1] 胡绍楼[2] 

机构地区：[1]四川大学光电科学技术系,成都610064 [2]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室,四川绵阳621900

出　　处：《四川大学学报（自然科学版）》2003年第2期283-286,共4页Journal of Sichuan University(Natural Science Edition)

摘　　要：全光纤VISAR进入干涉仪能产生干涉的两光束光程差近似为零 ,是全光纤VISAR测速的前提条件 .对此 ,研究了低输入光功率时 ,单模光纤的色散对全光纤VISAR光程差的影响 。The fiber optic velocity interferometer system will be capable of performing velocity measurements only when the two light beams are interferential which have the closest optical path among the light beams in this system. Analysis of the coherence of the above two light beams is presented, allowing for dispersion in the single mode optical fibers. Also the case is discussed that the measured surface has a high speed.

关 键 词：全光纤VISAR系统 色散 光程差 全光纤速度干涉仪 测速原理 单模光纤 光纤隔离器 

分 类 号：TH744.3[机械工程—光学工程]