CAJ | 학술논문

针对高精度光纤陀螺的温度敏感性问题，重点研究了光纤陀螺用保偏光纤温度性能。利用具有高空间分辨率的脉冲预泵浦光时域分析技术，测量不同温度点光纤的长度变化量，再根据光纤长度随温度的变化量与折射率温度系数的关系，给出光纤的折射率温度系数。试验共测量了8种国内和国外主流保偏光纤的折射率温度系数，测试结果显示：8种光纤折射率温度系数的最大值与最小值之间相差14％；某型国内保偏光纤与某型国外保偏光纤的折射率温度系数最小，量值基本相同。这种不同类型的保偏光纤折射率温度系数的差异与光纤纤芯的掺杂元素及掺杂浓度是直接相关的。该项测试技术可在基础材料层面提升光纤陀螺的温度性能；通过折射率温度系数测试，优恒出更加适用于光纤环圈制作的保偏光纤，从而减小光纤陀螺温度Shupe效应误差，对于提高光纤陀螺的温度性能具有重要意义。
침대고정도광섬타라적온도민감성문제，중점연구료광섬타라용보편광섬온도성능。이용구유고공간분변솔적맥충예빙포광시역분석기술，측량불동온도점광섬적장도변화량，재근거광섬장도수온도적변화량여절사솔온도계수적관계，급출광섬적절사솔온도계수。시험공측량료8충국내화국외주류보편광섬적절사솔온도계수，측시결과현시：8충광섬절사솔온도계수적최대치여최소치지간상차14％；모형국내보편광섬여모형국외보편광섬적절사솔온도계수최소，량치기본상동。저충불동류형적보편광섬절사솔온도계수적차이여광섬섬심적참잡원소급참잡농도시직접상관적。해항측시기술가재기출재료층면제승광섬타라적온도성능；통과절사솔온도계수측시，우항출경가괄용우광섬배권제작적보편광섬，종이감소광섬타라온도Shupe효응오차，대우제고광섬타라적온도성능구유중요의의。
In view of the problem of temperature sensitivity in high-precision fiber optic gyroscope(FOG), the temperature performance of polarization maintaining fiber for FOG is studied. By using the pulse pre-pump Brillouin optical time domain analysis with high spatial resolution, the length variation of fiber in different temperature can be measured, then the temperature coefficient of refractive index of fiber can be obtained. Eight kinds of polarization maintaining fibers for FOG were measured. There is a difference of 14% between the maximum and minimum temperature coefficients of refractive index, in which the temperature coefficient of refractive index of a foreign polarization maintaining fiber is the smallest. The difference between temperature coefficients of refractive index is directly related to the doping elements and concentration. This technology can be used to improve the temperature performance of FOG by testing the temperature coefficient of refractive index to select more suitable polarization maintaining fiber for optical fiber coil and thereby reduce the Shupe effect error of FOG.