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干涉式光纤陀螺(IFOG)与谐振式光纤陀螺(RFOG)和环形激光陀螺(RLG)一样,应用1913年法国物理学家Georges Sagnac发现的、并以其名字命名的Sagnac效应来测量在惯性空间中的旋转速率。Sagnac效应即闭台光路中相向传插的光波的差分相移与惯性空间中光路旋转速率成正比。旋转速率Ω与连带引起的相移φ_R之间的关系为: φ_R=(8πA/λc)Ω (1) 式中A为回路包围的面积,λ为真空中的波长,c为真空中的光速。对于正常的面积,标度因数8πA/λc很小。但RFOG和RLG利用谐振腔结构克服了这个问
The interferometric fiber optic gyroscope (IFOG), like the resonant fiber gyroscope (RFOG) and the ring laser gyroscope (RLG), uses the Sagnac effect named by the French physicist Georges Sagnac in 1913 to measure the inertial space Of the rotation rate. The Sagnac effect means that the differential phase shift of the light wave propagating in the closed path along the optical path is proportional to the rotational speed of the optical path in inertial space. The relationship between the rotation rate Ω and the induced phase shift φ_R is: φ_R = (8πA / λc) Ω (1) where A is the area enclosed by the loop, λ is the wavelength in vacuum and c is the speed of light in vacuum. For normal area, the scale factor is 8πA / λc is small. However, RFOG and RLG use the resonator structure to overcome this problem