提出由两个准直镜构成用于实现离轴旋转连接的光纤滑环，利用其与光纤布喇格光栅传感器结合，获得轴心被占用或为空心轴时旋转部件上温度测量的新方法。分析了影响光纤滑环插入损耗的主要因素，指出插入损耗对两准直镜间的横向错位和轴向夹角的变化很敏感，而对轴向间距的变化略显迟钝。旋转部件匀速转动过程中，光纤滑环的耦合信号为周期脉冲信号，测得信号的占空比为0.5%，与理论值基本相符。并利用光纤滑环对光纤布拉格光栅传感光路的耦合，实现旋转部件上待测温度场升温过程的实时观测，从而验证了此测量方法的可行性。

The fiber-optic slip-ring, consisting of two collimator lenses and realizing the off-axis rotating connection, as a new passive device proposed and connects with the optical fiber Bragg grating sensor is used to detect the temperature on the rotating parts when its axis is occupied or the shaft is hollow. The main influence factors of the insertion loss of the device are analyzed, theoretically. Simulation results show that the insertion loss is highly sensitive both to the transversal dislocation and the axial angle between two collimator lenses, while it is slightly insensitive to the change of the axial distance. Experiments show that during the rotating parts uniformed, the received signals through fiber-optic slip-ring are the periodic pulse signals, and the duty cycle of which is 0.5%, corresponds with the result of simulation. Using fiber-optic slip-ring coupling for fiber Bragg grating sensing light path, to achieve the change of temperature on the rotating part real-timely during heating the temperature field, the feasibility of this measurement method is verifies.