透過時域擬譜法分析光學相位共軛中不同張角對光聚焦在散射介質中之影響

Abstract

光學相位共軛在非線性光學和生醫光學領域已成為過去三十年來一個重要的研究主題。在這項研究中，我們使用了時域擬譜法（pseudospectral time-domain, PSTD）技術來模擬光學相位共軛（optical phase conjugation, OPC）現象，並且通過在模擬中改變光學相位共軛的角度範圍與散射介質中粒子數量，觀察在散射介質中光聚焦的現象。 最後，通過比較正向與反向傳播的電場分布圖、光源位置上的振幅與電場強度截面圖可以幫助分析光聚角在介質中的表現。

Optical phase conjugation has been a significant major research subject in nonlinear optics and biomedical optics for the last three decades. In this research, we utilize the pseudospectral time-domain (PSTD) technique to simulate the optical phase conjugation (OPC) phenomenon. Our research focused on observing the effect of focusing through a scattering medium by varying the OPC angular span and using different particle numbers in the medium during simulation. We analyzed the results by comparing the backward propagation with the forward propagation using electric field distribution diagrams, as well as examining the amplitude and electrical intensity on the interface at the light source location. These comparisons allowed us to analyze the overall effect of optical phase conjugation.