Method for manipulating optical energy using poled structure
    51.
    发明授权
    Method for manipulating optical energy using poled structure 失效
    使用极化结构来操纵光能的方法

    公开(公告)号:US5852688A

    公开(公告)日:1998-12-22

    申请号:US904198

    申请日:1997-07-31

    摘要: Method for optical energy transfer and energy guidance uses an electric field to control energy propagation using a class of poled structures in solid material. The poled structures, which may form gratings in thin film or bulk configurations, may be combined with waveguide structures. Electric fields are applied to the poled structures to control routing of optical energy. Techniques include frequency-selective switchable- and adjustable-tunable reflection, splitting, directional coupling, frequency-tunable switching and efficient beam combining, as well as polarized beam combining. Adjustable tunability is obtained by a poled structure which produces a spatial gradient in a variable index of refraction along an axis in the presence of a variable electric field. In one embodiment, the present invention is a method of switching a grating which consists of a poled material with an alternating domain structure of specific period. When an electric field is applied across the periodic structure, a Bragg grating is formed by the electro-optic effect, reflecting optical radiation with a certain bandwidth around a center wavelength. The grating may be used by itself, or in combination with other gratings to form integrated structures in a ferroelectric crystal. Specifically of interest is an method of using an integrated structure in which one or more optical waveguides interact with one or more periodic structures to form a wavelength selective integrated optic modulator, switch, or feedback element.

    摘要翻译: 光能转移和能量引导的方法使用电场来控制能量传播,使用固体材料中的一类极化结构。 可以形成薄膜或体积构造的光栅的极化结构可以与波导结构组合。 电场施加到极化结构以控制光能的路由。 技术包括频率选择性可切换和可调谐可调谐反射,分离,定向耦合,频率可调切换和有效的光束组合,以及偏振光束组合。 可调节的可调性通过极化结构获得,该极化结构在存在可变电场的情况下沿轴产生可变折射率的空间梯度。 在一个实施例中,本发明是一种切换由具有特定周期的交替畴结构的极化材料组成的光栅的方法。 当跨周期结构施加电场时,通过电光效应形成布拉格光栅,以围绕中心波长的一定带宽反射光辐射。 光栅可以自身使用,也可以与其他光栅组合使用,以在铁电晶体中形成集成结构。 特别感兴趣的是使用其中一个或多个光波导与一个或多个周期性结构相互作用以形成波长选择性集成光学调制器,开关或反馈元件的集成结构的方法。