公开(公告)号：US20170307911A1

公开(公告)日：2017-10-26

申请号：US15515831

申请日：2015-12-24

Applicant: Sumitomo Osaka Cement Co., Ltd

Inventor： Norikazu Miyazaki ,  Toshio Kataoka ,  Youichi Hosokawa ,  Kei Katou

IPC: G02F1/03 ,  G02F1/01 ,  G02B26/02 ,  G02F1/025 ,  G02F1/313

CPC classification number: G02F1/03 ,  G02B26/02 ,  G02F1/0121 ,  G02F1/0126 ,  G02F1/025 ,  G02F1/035 ,  G02F1/3133 ,  G02F2203/21

Abstract: Provided is an optical modulator in which low-voltage drive and a stable modulation characteristic are secured over a wide bandwidth. An optical modulator includes: a substrate 10; an optical waveguide (not shown) formed in the substrate 10; a modulation electrode (a signal electrode 11 and a ground electrode 12) for modulating light waves propagating through the optical waveguide; and an external signal line (not shown, only a connection connector 4 is shown) which is provided outside the substrate and supplies a modulation signal to the modulation electrode, in which an impedance value of the modulation electrode in an active region S in which an electric field formed by the modulation electrode is applied to the optical waveguide is set to be lower than an impedance value of the external signal line, and an impedance adjustment part 21 having an impedance adjustment function with respect to mainly a modulation signal in a low-frequency area and configured of a lumped-constant circuit, and an impedance matching line L having an impedance adjustment function with respect to mainly a modulation signal in a high-frequency area are disposed between the external signal line and the active region of the modulation electrode.

公开(公告)号：US20140093202A1

公开(公告)日：2014-04-03

申请号：US14037105

申请日：2013-09-25

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Norikazu Miyazaki ,  Motohiro Takemura ,  Youichi Hosokawa

IPC: G02F1/01

CPC classification number: G02F1/011 ,  G02F1/035 ,  G02F1/225

Abstract: An optical modulator comprises a substrate 4 having a thickness of 20 μm or less and an electro-optic effect, a reinforcing substrate 6 holding the substrate 4 thereon and a resin layer 5 disposed between the substrate and the reinforcing substrate, in which the substrate 4 includes optical waveguides 1 and 2 and control electrodes 3 and 31 which control light waves propagating through the optical waveguide, in which the optical waveguides include at least two optical waveguides 1 separated from each other, and in which the control electrodes 31 disposed between the two optical waveguides are configured to include two electrodes 31 disposed along each optical waveguide, and a thin line 8 conducting the two electrodes 31 at a same potential.

Abstract translation: 光学调制器包括厚度为20μm以下的基板4和电光效果，保持基板4的加强基板6和设置在基板和增强基板之间的树脂层5，其中基板4 包括光波导1和2以及控制电极3和31，控制电极3和31控制通过光波导传播的光波，其中光波导包括彼此分离的至少两个光波导1，并且其中设置在两者之间的控制电极31 光波导被配置为包括沿着每个光波导设置的两个电极31和将两个电极31导通相同电位的细线8。