液晶殼層光纖導模過濾的一種雙模光纖溫度感測靈敏度之改良

Abstract

本文是利用液晶的雙折射及幾何多樣性作為光纖的元件，用來過濾模態使光纖中僅剩HE11及TE01兩個模態。並利用這兩個模態的干涉用以感測溫度。由於這兩個模態有著良好的數學解析式，在分析處理上較容易。本文並利用實驗的方式找最佳檢偏器角度使得雙模溫度感測靈敏度最大。

Interference pattern of selected modes, namely HE11 and TE01,with liquid crystal cladding varies as temperature change. It’s easy to analyze the result because of well-defined math properties of these two modes. We’ll investigate that how to use experimental way to find optimized analyzer angle in order to maximize sensitivity of dual mode fiber temperature sensing.