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光纤陀螺的快速启动在军事、导航等领域极其重要,超辐射发光二极管(SLD)是光纤陀螺中启动速度最慢的器件。对SLD启动特性机理进行分析,采用高速数据采集卡对功率、驱动电流、温控电流和温度的变化情况进行了测试,得到了SLD的常温启动时间约为3~4s,启动时的最大功率波动误差为4.5%,上电瞬间驱动电流上升时间约为0.3s,SLD的制冷电流与热沉温度存在0.12s的延迟,环境温度与理想温度偏差越大,启动时间越长,而且高温启动时间要比低温启动时间长。分析了不同温度下SLD启动对光纤陀螺附加零偏的影响,增加前放增益可减小附加零偏。
Fast start-up of fiber optic gyroscope is extremely important in military affairs, navigation and other fields. Superluminescent Light Emitting Diode (SLD) is the slowest start-up device in fiber optic gyroscope. The mechanism of SLD start-up is analyzed, and the changes of power, drive current, temperature-controlled current and temperature are tested by high-speed data acquisition card. The start-up time of SLD is about 3 ~ 4s at normal temperature and the maximum power fluctuation The error is 4.5%, the driving current rise time is about 0.3s at power-on, the cooling current and heat sink temperature of SLD have 0.12s delay, the larger the deviation between ambient temperature and ideal temperature, the longer the starting time, and the high temperature starting time Longer than low temperature start-up. The effect of SLD start-up on the additional zero offset of FOG at different temperatures is analyzed. Increasing the pre-release gain can reduce the additional zero offset.