光學相位共軛模擬:波長調變對光在散射介質中聚焦分析

Abstract

利用光學相位共軛（optical phase conjugation），可以使光穿透入散射介質並聚焦，且反向傳播光的波長可以依照需求做調變。在本論文中，我們研究波長調變對於光在散射介質中聚焦效果的影響。我們用擬譜時域模擬技術（pseudospectral time-domain）模擬光傳播現象且控制波長調變（wavelength detune）的範圍：99.5%~100.5%之間。我們模擬在不同環境狀況下（不同的傳播光波長、散射介質個數、散射介質折射率）聚焦效果的影響，來分析各個因素對光在散射介質中聚焦的影響。

By employing the optical phase conjugation (OPC) phenomenon, light can be guided through and focus inside the scattering medium. In this thesis, we investigate the effect of wavelength detune on the focusing of light inside a scattering medium. We implement the pseudospectral time-domain simulation technique (PSTD) to model the focusing of OPC light with the wavelength detuned: from 99.5% to 100.5%. By modeling light propagation through various geometrical conditions, we analyze the effect of wavelength detune on the focusing of CW light through a scattering medium. The simulation findings may provide helpful information for the focusing of OPC light with detuned wavelength.