双面金属包覆介质波导模序数的判别方法

在双面金属包覆介质波导中 ,随着介质层厚度的变化 ,会出现TM0 模与TM1 模的分离和简并两种状态 ,从而影响衰减全反射 (ATR)谱中模序数的确认。通过对金属波导的理论分析和实验研究 ,提出了三种模序数确认方法 :本征角计算法、吸收峰全峰半宽比较法和吸收峰峰间距比较法 ,实现了两种状态下对模序数的准确判断

Method to Identify Mode Order in Doubler Metal-Cladding Waveguide

In double metal cladding waveguides, the separation and degeneration of TM 0 and TM 1 modes will appear as the thickness of guiding layer increases, this may confuse the judgement of mode orders in attenuated total reflection (ATR) spectrum. Based on theoretical analysis and experimental investigation in double metal cladding waveguides, three methods to indentify the mode orders are presented: 1) calculation of the synchronous angle; 2) comparation of the full width half maximum (FWHM) of resonance dips; 3) comparation of the distance between resonance dips, the mode orders in two situations can be clearly identified by these means.