【摘要】 分析了环境温度对单模光纤耦合器纤锥、环境介质的折射率、耦合区域尺寸的影响,进而引起纤锥分光比和附加损耗的变化,并给出两者变化的理论曲线和实验结果。结果表明在一定温度范围内分光比和附加损耗对温度呈线性变化关系,增敏处理有利于拓宽纤锥分光比对温度线性响应的范围,提高灵敏度。更多还原

【Abstract】 The effects of ambient temperature on the refractive indexes of the coupling-area of fused-tapered single-mode-fiber coupler and environmental medium,and on the length of coupling region,which consequently changes the coupling ratio and extra loss of the coupler,are analyzed. Meanwhile,the theoretical curves and experimental data of the changes are displayed. It’s noticed that both the coupling ratio and extra loss,within a certain range,will vary with the temperature linearly. Packaging with more sensitive materials is beneficial to broadening the range of linear response of the coupling ratio of the fiber to the temperature,and to improving the sensor sensitivity.更多还原