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本文概述了光波导气体传感器的结构,工作原理,对待测气体所引起的光波导表面染料膜的光吸收系数和折射率的改变与透射光强度的关系进行了理论分析和计算,给出了最佳膜厚度为d_esinθ_v/2。
In this paper, the structure and working principle of the optical waveguide gas sensor are summarized. The relationship between the optical absorption coefficient and refractive index change of the dye film on the optical waveguide surface and the transmitted light intensity caused by the gas to be measured is analyzed and calculated. Good film thickness d_esinθ_v / 2.