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用聚甲基丙烯酸甲酯 (PMMA)和偶氮染料DR1以一定的比例混合 ,制成各向同性均匀薄膜样品。用经斩波器调制的线偏振氩离子激光 (5 14nm ,CW )作用样品产生光致双折射。作为探测光的线偏振氦氖激光 (6 33nm ,CW)经过样品 ,在与其原来偏振方向垂直的检偏器后的透射光强强度受控制光的调制作用 ,实现了光控光的全光开关效应。通过改变控制光的光功率及薄膜样品的温度 ,对样品的开关响应速度和开关调制深度进行了研究。在一定的实验条件下 ,用毫瓦量级的控制光功率实现了几个毫秒的开关响应速度和 6 0 %以上的开关调制深度
Polymethylmethacrylate (PMMA) and azo dye DR1 were mixed at a certain ratio to make an isotropic homogeneous film sample. Photoablated birefringence was induced using a chopped-modulated linearly polarized argon-ion laser (5 14 nm, CW) on the sample. The linearly polarized He-Ne laser (6 33 nm, CW) as the probe light passes through the sample and modulates the intensity of the transmitted light after the analyzer is perpendicular to its original polarization direction to realize the all-optical switch of the light-controlled light effect. By changing the optical power of the control light and the temperature of the film sample, the switching response speed and the depth of modulation of the switch were studied. Under a certain experimental condition, with milliwatts of controlled optical power, the switching response speed of several milliseconds and the switching modulation depth of more than 60% are achieved