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为了解决高精度光纤陀螺要求长时间的标度因数稳定性到10-5以下,必须确保高精度光纤陀螺所采用的掺铒超辐射光纤光源具有非常稳定的平均波长。从超辐射掺铒光纤光源的结构出发,推导出其平均波长主要受到温度、抽运功率、抽运波长、抽运光偏振态以及光纤陀螺返回光功率的影响。详细分析了以上因素对于超辐射掺铒光纤光源平均波长稳定性的影响,并介绍了消除或者减小这些影响因素的措施。同时还总结了提高超辐射光纤光源的平均波长稳定性的相关技术,采用这些技术可以获得平均波长随温度变化系数±0.05×10-6/℃的高稳定性掺铒超辐射光纤光源。对于掺铒超辐射光纤光源在高精度光纤陀螺中的实际应用具有指导意义。
In order to solve the problem that high-precision fiber optic gyroscopes require long-term scale factor stability below 10-5, it must be ensured that erbium-doped super-radiation fiber light sources used in high-precision fiber optic gyroscopes have a very stable average wavelength. From the structure of the super-radiation erbium-doped fiber light source, the average wavelength is deduced to be mainly affected by the temperature, the pumping power, the pumping wavelength, the polarization state of the pumping light and the returning optical power of the FOG. The influence of the above factors on the average wavelength stability of the super-radiation erbium-doped fiber light source is analyzed in detail, and the measures to eliminate or reduce these influencing factors are introduced. At the same time, the related technologies to improve the average wavelength stability of the superluminescent fiber light source are summarized. High stability erbium-doped superluminescent fiber light source with average wavelength variation of ± 0.05 × 10-6 / ℃ can be obtained by these techniques. It is instructive for the practical application of erbium-doped superluminescent fiber light source in high-precision fiber optic gyroscope.