光纤陀螺用光源恒流驱动电路设计  

Design of constant current drive circuit for FOG

作　　者：孙广宇 鲁军 王子豪 SUN Guangyu;LU Jun;WANG Zihao(School of Electrical and Electronic Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050003,China)

机构地区：[1]石家庄铁道大学电气与电子工程学院,河北石家庄050003

出　　处：《光学仪器》2020年第2期70-74,共5页Optical Instruments

基　　金：河北省自然科学基金项目(F2016506014)。

摘　　要：光纤陀螺(FOG)光源管芯的阻抗特性是非线性的,为了保证光波长及输出光功率的稳定,必须控制管芯注入电流保持恒定。经过对超辐射发光二极管(SLD)光源管芯的分析研讨,采用LM324为核心器件设计了相应的恒流驱动电路,并进行了分析测试。实验结果表明,在环境温度不断变化的情况下,该恒流驱动电路可满足中、低精度,低功耗光纤陀螺的性能要求,其中常温下输出平均电压为100.242 mA,相对误差为0.013 7%。The impedance characteristics of the fiber-optic gyroscope(FOG) source die are nonlinear. In order to ensure the stability of the optical wavelength and output optical power, it is necessary to control the die injection current to be constant. In this paper, after analyzing the super luminescent diode(SLD) light source die, the corresponding constant current driving circuit is designed by using LM324 as the core device, and an experimental test is conducted. The experimental results show that the constant current driving circuit can meet the performance requirements of medium and low precision, low power FOG with the change of the constant environmental temperature. The average output voltage at normal temperature is 100.242 mA, and the relative difference is 0.013 7%.

关 键 词：光纤陀螺(FOG) 光波长 光功率 超辐射发光二极管(SLD) 

分 类 号：TN212[电子电信—物理电子学]