公开(公告)号：US20090180184A1

公开(公告)日：2009-07-16

申请号：US10566264

申请日：2004-08-04

申请人： Aharon J. Agranat ,  Clovis Eduardo Mazzotti De Oliveira

发明人： Aharon J. Agranat ,  Clovis Eduardo Mazzotti De Oliveira

IPC分类号： G02B27/44 ,  G02B5/18

CPC分类号： G02B5/1828 ,  G02F1/292 ,  G02F1/31

摘要： Methods for permanently introducing patterns in electro-optic crystals are provided, by forming patterned variations in the composition of the electro-optic crystals [28], during the crystal growth process. These methods open a way to a family of light-controlling devices that can operate at temperatures as high as 80 degrees centigrade, and may be stored at temperatures as high as 300 degrees centigrade. Additionally, they may withstand radiation of natural light and cosmic ray. In accordance with one embodiment, an electrically [76] controlled Bragg grating is introduced into a crystal, by a permanent periodic spatial variation [60] of its composition, forming permanent periodic striations. The periodic striations induce a spatial modulation of the dielectric constant, and the application of a uniform electric field produces an induced polarization grating.

摘要翻译： 通过在晶体生长过程中形成电光晶体[28]的组成中的图案变化，提供了在电光晶体中永久引入图案的方法。 这些方法开启了一种可以在高达80摄氏度的温度下工作的一系列光控制装置，并且可以在高达300摄氏度的温度下储存。 此外，它们可以承受自然光和宇宙射线的辐射。 根据一个实施例，通过其组成的永久周期性空间变化[60]将电[76]控制的布拉格光栅引入晶体，形成永久的周期性条纹。 周期条纹引起介电常数的空间调制，并且均匀电场的应用产生感应偏振光栅。