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首页> 外文会议>Transparent Optical Networks, 2004. Proceedings of 2004 6th International Conference on >Nonlinear optical properties of chalcogenide glasses at telecommunication wavelength using nonlinear imaging technique
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Nonlinear optical properties of chalcogenide glasses at telecommunication wavelength using nonlinear imaging technique

机译：使用非线性成像技术的硫族化物玻璃在电信波长的非线性光学特性

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Infrared chalcogenide glasses are studied with respect to their nonlinear optical properties. These glasses are transparent from the end of the visible region to wavelengths above 10 /spl mu/m depending on the composition. Using a quarter-wavelength phase object at the entry of a 4f coherent imaging system, we show that it is possible to characterize the value of the nonlinear refractive index of materials placed in the Fourier plane of the setup. Experimental and simulated images are presented in order to validate our approach. We report that the use of a dephasing object maximizes the transmission variations in the detected image and increases significantly the sensitivity of the measurement compared to top-hat beams (by a factor of 6). Moreover, by adding this type of object at the entry of our imaging system it is possible to determine the sign of the refractive nonlinearity. Different chalcogenide bulk glasses are characterized in the picosecond domain at 1.06 /spl mu/m and 1.55 /spl mu/m. Refractive nonlinearity three orders of magnitude above the nonlinearity of silica glass is obtained.
机译：就红外硫属化物玻璃的非线性光学特性进行了研究。这些玻璃从可见光区域的末端到大于10 / spl mu / m的波长都是透明的，具体取决于组成。在4f相干成像系统的入口处使用四分之一波长相位对象，我们表明可以表征放置在设备傅里叶平面中的材料的非线性折射率值。为了验证我们的方法，提供了实验图像和模拟图像。我们报告说，相移物体的使用使检测到的图像中的透射率变化最大化，并且与高顶光束相比，测量的灵敏度显着提高（系数提高了6倍）。此外，通过在我们的成像系统的入口处添加此类物体，可以确定折射非线性的符号。不同的硫族化物块状玻璃的皮秒区特征为1.06 / spl mu / m和1.55 / spl mu / m。获得了比石英玻璃的非线性高三个数量级的折射非线性。

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