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超荧光掺铒光纤光源技术是高精度光纤陀螺的关键技术之一,其优劣直接影响陀螺的性能。在完成铒纤长度优化设计的基础上,实验分析了泵浦功率对掺铒光纤光源平均波长以及带宽的影响,同时在-20￣60℃的温度范围内,测量了不同泵浦功率条件下掺铒光纤光源平均波长、带宽和输出功率随温度的漂移。实验结果表明,当泵浦功率在60￣120 mW范围内时,平均波长受泵浦功率的影响约为-6.5 ppm/mW,可以根据光纤陀螺对输出功率和带宽大小的要求在此范围内选择合适的泵浦功率。最终装配样机的平均波长的长期稳定性(6 h)达到5 ppm(峰-峰值),短期稳定性(1 h)达到2 ppm,可以在此基础上定制合适的光纤光栅滤波器,对ASE光谱进行滤波,使谱形满足高精度光纤陀螺的要求。
Ultra-fluorescence erbium-doped fiber light source technology is one of the key technologies of high-precision fiber optic gyroscope, which directly affects the performance of the gyroscope. Based on the optimized design of erbium fiber length, the influence of pump power on the average wavelength and bandwidth of erbium-doped fiber light source was experimentally analyzed. In the temperature range of -20 ~ 60 ℃, Erbium-doped fiber light source with average wavelength, bandwidth and output power drift with temperature. The experimental results show that when the pump power is in the range of 60-120 mW, the average wavelength is affected by the pump power of about -6.5 ppm / mW, and the output power and bandwidth requirements of the FOG can be selected within this range Proper pump power. The long-term stability (6 h) of the average wavelength of the final assembly prototype reaches 5 ppm (peak-to-peak) and the short-term stability (1 h) to 2 ppm. Based on this, a suitable fiber grating filter can be customized to measure the ASE spectrum Filtering, the spectrum to meet the requirements of high-precision fiber optic gyroscope.