光子纠缠光纤陀螺仪的相位检测灵敏度分析  

Analysis on phase detection sensitivity of photon entangled fiber optic gyroscope

作　　者：张桂才[1] 冯菁 马林[1] 王周祥 ZHANG Guicai;FENG Jing;MA Lin;WANG Zhouxiang(Tianjin Navigation Instruments Research Institute,Tianjin 300131,China)

机构地区：[1]天津航海仪器研究所,天津300131

出　　处：《中国惯性技术学报》2021年第6期809-814,共6页Journal of Chinese Inertial Technology

基　　金：装备预研基金项目(80917010101)。

摘　　要：针对量子输入通常需要双输入/双输出的特征,提出了一种采用双环行器的光子纠缠光纤陀螺光路结构。阐述了基于N00N态的光子纠缠光纤陀螺仪的工作原理,首次推导了N00N态光子纠缠光纤陀螺的德布罗意波的量子干涉公式,并将N00N态与具有相同光子数(光功率)的一般光子数态(22)输入以及经典输入的相位检测灵敏度进行了对比。分析表明,N00N态作为理想的最大路径纠缠态,可以突破散粒噪声极限而达到海森堡极限,而其它非经典态由于输出态的生成概率,其二阶符合计数及高阶符合计数存在一个固有效率,可能较难突破散粒噪声极限。In view of the fact that the quantum inputs usually needs double input/double output,an optical structure of photon entangled fiber optic gyroscope using double circulators is proposed.The operational principle of photon entangled fiber optic gyroscope based on N00 N state is described.The quantum interference formula of de Broglie wave for photon entangled fiber optic gyroscope is derived,and the phase detection sensitivity of N00 N state is compared with that of classical state and general photon number state with the same photon number(optical power).The analysis shows that N00 N state as the maximum optical path entangled state can beat the shot noise limit and reach the Heisenberg limit,while other non-classical states may be difficult to beat the shot noise limit due to the inherent probability of its second order coincidence and high order coincidence of the output state.

关 键 词：光纤陀螺 N00N态 光子纠缠 海森堡极限 

分 类 号：U666.1[交通运输工程—船舶及航道工程]