基于多点耦合内切的光纤谐振环慢光系统转动传感理论  

Optical fiber rotation sensing based on inscribed multi-point-coupling resonance loop structure slow light system

作　　者：王子南[1] 王翠云[1] 王玉杰[1] 王大量[1] 孙月[1] 徐连宇[1] 李正斌[1,2] 

机构地区：[1]北京大学区域光纤通信网与新型光通信系统国家重点实验室,北京100871 [2]集成光电子学国家重点联合实验室,北京100083

出　　处：《红外与激光工程》2011年第12期2492-2496,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金(60772003);国家863计划(2006AA12Z310)

摘　　要：为满足惯性制导对高精度、高稳定度陀螺仪的需求,进行了对基于高色散谐振环结构的光纤陀螺原理研究。在一些高色散耦合谐振环结构中,其色散性质使其系统传递函数对相位微扰十分敏感,可以对萨格纳克相移起到放大作用,从而大大提高传感灵敏度。理论与仿真研究结果表明:多点耦合内切谐振环慢光结构系统能够同时满足实现高灵敏度转动传感所要求的"方向性条件"和"高群折射率(慢光)"两个基本条件,且具有进一步使群折射率比传统结构高出几个数量级的潜力。同时,由于该结构系统可使用定向耦合器来方便搭建,具有用来制作低成本、高灵敏度的光纤陀螺的潜力。In order to meet the requirements of inertial guidance to gyroscope with high sensitivity and stability,the principle of fiber-optic gyroscope based on highly dispersive resonance loop structure was studied.In some highly dispersive resonance loop structures,the transfer function is extremely susceptible to the phase perturbation in the light path.Sagnac phase shift is enlarged as a result,thus the sensitivity is enhanced.The ＂directional condition＂ and the ＂high group refractive index（slow light）＂ are two basic conditions to achieve high rotation sensitivity.Theory and simulation results show that the inscribed multi-point-coupling resonanceloop structure slow light system meets the two conditions simultaneously.It has a group refractive index higher than the traditional structure for an order of magnitude.As it can be conveniently manufactured by using directional couplers,this structure is a good candidate for low-cost,highly sensitive fiber-optic gyroscopes.

关 键 词：光学传感器 光纤陀螺 萨格纳克效应 耦合谐振环结构 

分 类 号：O436[机械工程—光学工程]