首页>
外国专利>
Method and apparatus for increasing the stability of a fiber optic gyroscope by controlling the phase and amplitude of the source modulating current
Method and apparatus for increasing the stability of a fiber optic gyroscope by controlling the phase and amplitude of the source modulating current
展开▼
机译:通过控制源调制电流的相位和幅度来增加光纤陀螺仪稳定性的方法和设备
展开▼
页面导航
摘要
著录项
相似文献
摘要
A small modulation current is applied to the light source of a Sagnac- type fiber optic gyroscope to increase accuracy and/or stability of scale factor (open loop configuration) and to reduce bias errors and random walk (closed-loop configuration). The phase and amplitude of the modulation current are controlled through a control circuit whose reference is picked off at a first beamsplitter in series with the light source. In such a way, light emitted from the light source into the interferometer contains no modulation. The elimination of modulation removes a source that would otherwise cause deterioration of gyroscope stability resulting from light returning from the interferometer or due to electrical interference, thus limiting measurement accuracy.
展开▼