Zhang Dengwei, Zhao Yuxiang, Fu Wenlan, Zhou Wenqing, Liu Cheng, Shu Xiaowu, Che Shuangliang
Opt Lett. 2014 Mar 15;39(6):1382-5. doi: 10.1364/OL.39.001382.
A theory for nonreciprocal phase shift caused by cross coupling generated in a polarization maintaining (PM) fiber optic gyroscope (FOG) under the combined action of magnetic and temperature fields is proposed. The magnetic-thermal coupling in the FOG originates from the interaction of the magnetic field, fiber twist, birefringence caused by thermal stress, and the intrinsic and bending birefringence of the fiber. The cross coupling changes with temperature. When the PM fiber has a diameter of 250 μm, beat length of 3 mm, length of 500 m, twist rate of 1 rad/m, and optical source wavelength of 1310 nm, the maximum degree of magnetic-thermal coupling generated by a 1 mT radial magnetic field within the temperature range of -20°C to 60°C is -5.47%.
提出了一种关于在磁场和温度场联合作用下，保偏（PM）光纤陀螺（FOG）中产生的交叉耦合导致非互易相移的理论。光纤陀螺中的磁热耦合源于磁场、光纤扭转、热应力引起的双折射以及光纤的固有双折射和弯曲双折射之间的相互作用。交叉耦合随温度变化。当保偏光纤直径为250μm、拍长为3mm、长度为500m、扭转率为1rad/m且光源波长为1310nm时，在-20°C至60°C温度范围内，1mT径向磁场产生的最大磁热耦合度为-5.47%。
