光源稳定性对光纤陀螺性能的影响及解决方案

Influence of sources’ stability on FOG’s characteristics and its solution

分析了光源出纤功率和波长波动对陀螺性能的影响,并理论研究了双程后向结构掺铒光纤超荧光光源的特性。结果表明,在任意反射镜参数下,只要选取适当的掺铒光纤长度,该结构光源总能实现不依赖于泵浦功率的平均波长高稳定性运行;在高稳定性的前提下,反射镜参数优化后的该结构光源有较宽的频带宽度和较高的输出功率。得出了该结构光源可以满足高精度惯导级光纤陀螺对光源稳定性要求的结论。

The influences of the undulation of the output power and mean-wavelength of sources to the characteristics of fiber-optic gyroscope（FOG） are analyzed, and Erbium-doped superfluorescent fiber sources （SFS） pumped in double-pass backward （DPB） configuration are characterized through theoretical simulation. The results indicate that the mean-wavelength stability can always be maintained by properly adjusting the erbium-doped fiber （EDF）＇s length without any dependence on pump power under any parameters of reflector. In the case of high stable mean-wavelength operation, the DPB SFS with the optimized reflector has a spectrum linewidth and pump efficiency obviously larger than SFS in other configurations. The conclusion that SFS can meet the requirements of high precision navigational-grade FOG is educed.