Based on the optical theory of planar wave - guide , this paper analyzes the transformation of pattern from symmetrical wave - guide to asymmetrical wave - guide . and the result shows that some patterns will radiate from the wave - guide when applying an external force on the sensor 論文以平面光波導(dǎo)的幾何光學(xué)理論為基礎(chǔ),分析了光波導(dǎo)從( n0 - n1 - n0 )對(duì)稱波導(dǎo)向( n2 - n1 - n0 )非對(duì)稱波導(dǎo)轉(zhuǎn)變中導(dǎo)波模式所發(fā)生的變化。