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1. 发明授权

US5452123A Method of making an optically nonlinear switched optical device and related devices 失效
标题翻译：制造光学非线性开关光学器件及相关器件的方法
公开(公告)号：US5452123A
公开(公告)日：1995-09-19
申请号：US999487
申请日：1992-12-30
申请人： Sanford A. Asher , Song-Yuan Chang , Seshadri Jagannathan , Rasu Kesavamoorthy , Guisheng Pan
发明人： Sanford A. Asher , Song-Yuan Chang , Seshadri Jagannathan , Rasu Kesavamoorthy , Guisheng Pan
IPC分类号： G02B6/122 , G02F1/35 , G02B26/00
CPC分类号： B82Y20/00 , G02B6/1225 , G02F1/3511
摘要： Methods for making a nonlinear optical device and related devices are dissed. The method includes creating an ordered dispersion of charged particles in a surrounding medium. The charged particles and the surrounding medium are chosen such that they initially have identical refractive indices. In accordance with one aspect of the invention, cadmium sulfide inclusions are added to at least one of (a) the particles or (b) the medium. The cadmium sulfide inclusions have a highly nonlinear refractive index. The inclusions are optically nonlinear and upon high intensity radiation the refractive index of the particles change. This change in the refractive index occurs on the order of nanoseconds. In accordance with another aspect of the invention, a nonfluorescent dye is incorporated into at least one of (a) the particles or (b) the medium. The dye is photoabsorptive. Upon being impinged with high intensity radiation, the dye absorbs photons and heats the surrounding particles. This temperature increase causes a change in the refractive indices of the particles or medium. When the particle or medium refractive index is altered from that of the medium or particle the array diffracts light and prevents transmission of a specific wavelength. In accordance with yet another aspect of the invention, photorefractive materials such as lithium niobate or barium titanate substances can be used to induce the required optical nonlinearity. Related devices are also disclosed which exhibit high speed optical switching properties. The device may be employed advantageously in an optical computer or optical limiter.
摘要翻译：公开了制造非线性光学器件和相关器件的方法。该方法包括在周围介质中产生带电粒子的有序分散体。选择带电粒子和周围介质使得它们最初具有相同的折射率。根据本发明的一个方面，向（a）颗粒或（b）介质中的至少一种添加硫化镉夹杂物。硫化镉夹杂物具有高度非线性折射率。夹杂物是光学非线性的，并且在高强度辐射下，颗粒的折射率改变。折射率的这种变化发生在纳秒级。根据本发明的另一方面，将非荧光染料掺入（a）颗粒或（b）介质中的至少一种中。染料是光吸收性的。当被高强度辐射照射时，染料吸收光子并加热周围的颗粒。该温度升高导致颗粒或介质的折射率的变化。当颗粒或介质折射率与介质或颗粒的粒子或介质折射率相比改变时，阵列衍射光并防止特定波长的透射。根据本发明的另一方面，可以使用诸如铌酸锂或钛酸钡物质的光折射材料来诱导所需的光学非线性。还公开了展现高速光学开关性能的相关装置。该装置可以有利地用于光学计算机或光学限制器中。

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