光纤陀螺光源筛选与评价方法研究

针对光纤陀螺工程化对超辐射发光二极管(SLD)光源筛选的需求,开展了光源筛选和评价方法的试验和理论分析研究。通过构建光纤陀螺光源综合调试和检测系统,对SLD光源所有外部可获取特征进行了实时监测。测试和理论分析结果表明,SLD的离散特性主要受光源内部组件特性的影响;在散热充分的情况下,SLD的离散性可近似由TEC等效内阻、温控电流、热敏电阻温度系数和发光芯片功率来表征;SLD光源的常规评价指标与上述指标相结合,可更为完备地对光源进行筛选。另外,构建的光纤陀螺光源综合调试和检测系统也可直接作为光源筛选系统。

Study on Screening and Evaluation Methods of Superluminesent Diode in I-FOG

Aiming at the screening requirements of superluminesent diodes (SLD) in interferometric fiber opticgyro (I FOG), the theoretical and experimental investigations on SLD evaluation were carried out. Using the comprehensive test system, the relationship between the control parameters and characteristics of SLD was measured. The test results indicate that the equivalent resistance of TEC, power of SLD, cooling current and temperature coefficient of thermistor are the main factors affecting the matching between SLD and control parameters; if SLDs are tested closing to the practical conditions, the above characteristics can evaluate whether SLD matches the control parameters; if the above evaluation parameters can combine with the normal evaluation parameters, the SLD can be selected more completely.