光纤陀螺光源驱动技术

Driving Technology of the Light Source of FOG

为提高光纤陀螺精度 ,实现光纤陀螺工程化 ,设计了高精度恒流源及精密温控电路 ,用于光纤陀螺光源驱动 .结合光纤陀螺特点 ,讨论了从光纤陀螺耦合器和探测器提取信号进行光反馈控制的方案 .测试结果表明 ,在变温环境下( - 2 0℃～ 5 5℃ ) ,恒流精度达到 0 .0 6% ,温控精度达到 0 .1℃ ,光源出纤功率的变化在 0 .1 %范围内 。

For the purpose of improving precision and practicability of fiber optic gyroscope (FOG), a current source and a temperature control circuit were designed for driving the light source of FOG. Considering the characteristics of the FOG, a scheme of controlling the driving current by the feed back light from the coupler and detector of FOG was discussed. The testing results indicated that, in a temperature range of -20°C to 55°C, the present technology can yield a current precision as high as 0.06%, a temperature control precision of 0.1°C, and a variation of light power less than 0.1%.