公开(公告)号：US20150212344A1

公开(公告)日：2015-07-30

申请号：US14263389

申请日：2014-04-28

Applicant: Cisco Technology, Inc.

Inventor： Vipulkumar PATEL ,  Prakash GOTHOSKAR ,  Sean ANDERSON

IPC: G02F1/01 ,  G02F1/00

CPC classification number: G02F1/025 ,  G02B6/132 ,  G02B6/136 ,  G02F1/011 ,  G02F1/2257 ,  G02F2001/0152

Abstract: An optical modulator may include a lower waveguide, an upper waveguide, and a dielectric layer disposed therebetween. In one embodiment, the lower waveguide may include a u-shaped region within an optical mode of the light passing through the optical modulator. By conforming the dielectric layer to the surfaces of the u-shaped region, the amount of area of the dielectric layer within a charge modulation region is increased relative to forming the dielectric layer on a single plane. Folding the dielectric layer in this manner may improve modulation efficiency. In one embodiment, the u-shaped region is formed by using ridge structures that extend from an upper surface of the lower waveguide towards the upper waveguide. To aid in lateral confinement of the optical mode, the dielectric layer may be deposited on one side surface of the ridge structures while a different dielectric material is deposited on the opposite side surface.

Abstract translation: 光调制器可以包括下波导，上波导和介于其间的电介质层。 在一个实施例中，下波导可以包括通过光调制器的光的光学模式内的u形区域。 通过使介电层与U形区域的表面相一致，相对于在单个平面上形成电介质层，电荷调制区域内的电介质层的面积增加。 以这种方式折叠介电层可以提高调制效率。 在一个实施例中，通过使用从下波导的上表面向上波导延伸的脊结构形成U形区域。 为了有助于光学模式的横向限制，介电层可以沉积在脊结构的一个侧表面上，而不同的电介质材料沉积在相对的侧表面上。