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在温变条件下,对光纤光源发出光波经单模光纤耦合器传输后的输出光谱进行了测试.借助测试结果,仿真计算了耦合器的透射光波和耦合光波分别进入Sagnac干涉仪后干涉仪输出信号的误差随温度的变化情况.结果表明:当环境温度发生变化时,耦合器透射光波和耦合光波的平均波长和功率都会发生变化,且透射光波的平均波长和功率的温度稳定性远远高于耦合光波的稳定性;当透射光波作为干涉仪输入光波时,由温变引起的干涉仪输出误差比耦合光波作为输入光波时的误差小一个数量级.
Under the condition of temperature change, the output spectrum of the light emitted by the fiber light source after being transmitted through the single mode fiber coupler was tested. With the test results, the output of the interferometer after entering the Sagnac interferometer The results show that when the ambient temperature changes, the average wavelength and power of the transmitted light and the coupled light will change, and the mean wavelength of the transmitted light and the temperature stability of the power are far higher When the transmitted light wave is used as the input light wave of the interferometer, the error of the interferometer caused by the temperature change is smaller than the error of the coupled light wave as the input light wave by an order of magnitude.