s光和p光在反射过程中的相位延迟和补偿方法研究

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中图分类号：O436.3文献标志码：A

Research on phase delay and compensation method of s-polarized and p-polarized-light during reflection

XU Hongfan，LIN Jian

（1. School of Optical-Electrical and Computer Engineering，University of Shanghai for Science and Technology， Shanghai 200093， China;

2.Institute of Photonic Chips， University of Shanghai for Science and Technology，Shanghai 20o093， China）

Abstract： Polarization is one of the important properties of light and has a wide range of applications in laser processing and optical imaging. Optical elements have different phase delays for s-polarized and p-polarized-light， which may distort the polarization status of light.Reflective optical elements such as reflection mirrors and dichroic mirrors also have significant influences on the polarization characteristics of light. To address this issue， this paper experimentally measured the phase delay difference between s-polarized and p-polarized-light in the reflection process of reflection mirrors and dichroic mirrors under different polarization and incidence angles.A scheme was proposed to compensate for the phase delay difference by using a spatial light modulator （SLM） or a liquid-crystal phase retarder. Experimental results showed that after the compensation， phase delay difference induced by reflective optical elements could be reduced from 25∘ to about 4∘ .Base on this scheme，polarized Raman signals of Si（0 0 1） sample were acquired in good agreement with theoretical prediction. The method proposed in this work could be useful for the precise control of the light polarization in polarization related research and applications.

Keywords： phase delay difference; phase compensation; extinction ratio; polarized Raman

偏振作为光场的基本属性之一，在光与物质的相互作用中发挥着重要作用[1]。（剩余10288字）