公开(公告)号：US5208697A

公开(公告)日：1993-05-04

申请号：US502377

申请日：1990-03-30

Applicant: James H. Schaffner ,  Robert L. Joyce ,  Caroline M. Gee ,  James M. Schellenberg

Inventor： James H. Schaffner ,  Robert L. Joyce ,  Caroline M. Gee ,  James M. Schellenberg

IPC: G02F1/035 ,  G02F1/21 ,  G02F1/225

CPC classification number: G02F1/2255 ,  G02F1/0356 ,  G02F2001/212 ,  G02F2201/127

Abstract: A travelling-wave Mach-Zehnder electro-optic modulator (10) for operation at microwave electrical input signal frequencies has an electrical modulation electrode structure (26,34) which constitutes a coplanar waveguide (24). An electrical input signal connector (80) is coupled to a microstrip line (38) having an output impedance which is significantly different from the input impedance of the waveguide (24). A Chebyshev impedance matching transformer (50) couples the input signal from the input connector (80) to the modulation electrode structure (26,34), while matching the output impedance of the microstrip line (38) to the input impedance of the waveguide (24) to maximize the coupling efficiency and minimize return loss. The modulatoGOVERNMENT RIGHTSThis invention was made with Government support under Contract No. N66604-87-C-1126 awarded by the Department of the Navy. The Government has certain rights in this invention.

Abstract translation: 用于在微波电输入信号频率下操作的行波马赫曾德尔电光调制器（10）具有构成共面波导（24）的电调制电极结构（26,34）。 电输入信号连接器（80）耦合到具有与波导（24）的输入阻抗显着不同的输出阻抗的微带线（38）。 切比雪夫阻抗匹配变压器（50）将来自输入连接器（80）的输入信号耦合到调制电极结构（26,34），同时将微带线（38）的输出阻抗与波导的输入阻抗 24）以最大化耦合效率并最小化回波损耗。 调制器（10）安装在吸收寄生谐振微波发射的磁负载环氧化物材料的块（70）上，并且使得调制器（10）能够在宽范围的微波输入频率上以平滑的频率响应运行。

公开(公告)号：US5004313A

公开(公告)日：1991-04-02

申请号：US280101

申请日：1988-12-01

Applicant: Michael R. Ty Tan ,  Shih-Yuan Wang

Inventor： Michael R. Ty Tan ,  Shih-Yuan Wang

IPC: G02F1/015 ,  G02F1/025

CPC classification number: G02F1/025 ,  G02F2001/0154 ,  G02F2201/127

Abstract: A travelling wave modulator that modulates the phase velocity of an electromagnetic travelling wave in response to travelling wave electrical signal travelling parallel to the electromagnetic wave. The physical parameters of various layers in the modulator are selected to optimize a figure of merit of the modulator. Suitable figures of merit are bandwidth, bandwidth to voltage V.sub..pi. ratio and difference in velocity between the electrical signal and the electromagnetic travelling wave.

公开(公告)号：US12019349B2

公开(公告)日：2024-06-25

申请号：US17167564

申请日：2021-02-04

Applicant: Fujitsu Optical Components Limited

Inventor： Masaki Sugiyama

IPC: G02F1/035 ,  G02F1/225

CPC classification number: G02F1/2255 ,  G02F1/0356 ,  G02F2201/127

Abstract: An optical device includes an optical waveguide formed of a crystal thin film having an electro-optic effect, an RF electrode configured to apply a high-frequency voltage to the optical waveguide, and a DC electrode configured to apply a DC voltage to the optical waveguide, wherein the RF electrode has a coplanar electrode configuration, and the DC electrode has a microstrip electrode configuration.

公开(公告)号：US12013601B2

公开(公告)日：2024-06-18

申请号：US17896995

申请日：2022-08-26

Applicant: HyperLight Corporation

Inventor： Prashanta Kharel ,  Mian Zhang ,  Christian Reimer

IPC: G02F1/03 ,  G02B6/125 ,  G02F1/035 ,  G02F1/225 ,  G02B6/12

CPC classification number: G02F1/0356 ,  G02B6/125 ,  G02F1/2255 ,  G02B2006/12142 ,  G02F2201/127 ,  G02F2202/20

Abstract: A velocity mismatch between optical signals and microwave electrical signals in electro-optic devices, such as modulators, may be compensated by utilizing different lengths of bends in the optical waveguides as compared to the microwave electrodes to match the velocity of the microwave signal propagating along the coplanar waveguide to the velocity of the optical signal. To ensure the electrode bends do not affect the light in the optical waveguide bends, the electrode may have to be rerouted, e.g. above or below, the optical waveguide layer. To ensure that the pair of optical waveguides have the same optical length, a waveguide crossing may be used to cross the first waveguide through the second waveguide.

公开(公告)号：US11841598B2

公开(公告)日：2023-12-12

申请号：US17429268

申请日：2020-02-07

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Masayuki Takahashi ,  Ken Tsuzuki ,  Toshihiro Ito ,  Kiyofumi Kikuchi

IPC: G02F1/21 ,  G02F1/015 ,  G02F1/025 ,  G02F1/225

CPC classification number: G02F1/212 ,  G02F1/015 ,  G02F1/025 ,  G02F1/2257 ,  G02F2201/127

Abstract: A optical modulator with reduced with a reduced amount of ripple is provided. A Mach-Zehnder optical modulator includes a phase modulation unit including optical waveguides having a PN junction structure and traveling wave electrodes, and a dummy phase modulation unit including portions of the traveling wave electrodes, the portions being obtained by forming the respective traveling wave electrodes longer than the phase modulation unit in the light propagation direction of the phase modulation unit, and optical waveguides having the same PN junction structure as that of the optical waveguides of the phase modulation unit and not connected to the optical waveguides of the phase modulation unit.

公开(公告)号：US11740533B2

公开(公告)日：2023-08-29

申请号：US17474105

申请日：2021-09-14

Applicant: Ciena Corporation

Inventor： Michel Poulin ,  Alexandre Delisle-Simard ,  Michael Vitic

IPC: G02F1/225 ,  G02F1/025

CPC classification number: G02F1/2255 ,  G02F1/025 ,  G02F2201/127

Abstract: A first transmission line comprises a first pair of electrodes receiving an electrical drive comprising first and second drive signals, which are loaded by a first series of p-n junctions applying optical phase modulation to respective optical waves propagating over a first section of the first and second optical waveguide arms of an MZI. A second transmission line comprises a second pair of electrodes configured to receive the electrical drive after an electrical signal delay. The second pair of electrodes are loaded by a second series of p-n junctions applying optical phase modulation to the respective optical waves propagating over a second section of the first and second optical waveguide arms after propagation over the first section. An electrode extension structure provides the electrical drive to the second pair of electrodes, and comprises an unloaded transmission line portion imposing the electrical signal delay based on an optical signal delay.

公开(公告)号：US20190187495A1

公开(公告)日：2019-06-20

申请号：US15845073

申请日：2017-12-18

Applicant: Nokia Solutions and Networks OY

Inventor： Argishti Melikyan ,  Po Dong

IPC: G02F1/035 ,  G02F1/03 ,  G02F1/017 ,  G02F1/01

CPC classification number: G02F1/0353 ,  G02F1/0123 ,  G02F1/01708 ,  G02F1/0327 ,  G02F2001/212 ,  G02F2201/127

Abstract: An electro-optical circuit in which diode-like electrical characteristics of an optical modulator employed therein are used to generate one or more DC-offset levels that place the optical modulator into a proper electrical operating configuration for modulating light transmitted therethrough. In an example embodiment, the optical modulator includes an optical waveguide comprising at least a portion of a semiconductor diode connected to a data driver using a clamping circuit, the clamping circuit being configured to cause a data-modulated electrical signal outputted by the data driver to set a DC-offset level applied to the semiconductor diode. As a result, the use of on-chip and/or on-board bias-tees can advantageously be avoided. In some embodiments, the optical modulator can be driven using two different data signals, each used to set a different respective DC-offset level at the semiconductor diode. In various embodiments, the optical modulator can be an intensity modulator and/or a phase modulator.

公开(公告)号：US20180173018A1

公开(公告)日：2018-06-21

申请号：US15671982

申请日：2017-08-08

Applicant: WUHAN RESEARCH INSTITUTE OF POSTS AND TELECOMMUNICATIONS

Inventor： MIAOFENG LI ,  XI XIAO ,  LEI WANG ,  DAIGAO CHEN ,  QI YANG ,  SHAOHUA YU

IPC: G02F1/01

CPC classification number: G02F1/011 ,  G02F2201/122 ,  G02F2201/127

Abstract: The present invention discloses a GSG track-type radio-frequency electrode, a silicon-based traveling-wave electrode light modulator, and a preparation method, and relates to the field of high-speed electro-optical chips. The GSG track-type radio-frequency electrode includes a GSG-type planar electrode, where a track electrode used for delaying an electric field is periodically added to one side or dual sides of the GSG-type planar electrode, and the track electrode is connected to a ground electrode of the GSG-type planar electrode. The silicon-based traveling-wave electrode light modulator includes the GSG track-type radio-frequency electrode and a conventional silicon-based traveling-wave electrode light modulator, and the GSG track-type radio-frequency electrode is connected to an active region of the silicon-based traveling-wave electrode light modulator by using through holes between electrode layers. The present invention can improve parameter design freedom of an electrode and realize effective signal parameter matching.

公开(公告)号：US09853738B2

公开(公告)日：2017-12-26

申请号：US15234359

申请日：2016-08-11

Applicant: Coriant Advanced Technology, LLC

Inventor： Ran Ding ,  Thomas Wetteland Baehr-Jones ,  Michael J. Hochberg ,  Alexander Rylyakov

IPC: H04B10/04 ,  H04B10/556 ,  H04B10/516 ,  H04B10/54 ,  G02F1/225 ,  G02F1/01 ,  G02F1/025 ,  G02F1/21

CPC classification number: H04B10/5561 ,  G02F1/0123 ,  G02F1/025 ,  G02F1/2257 ,  G02F2001/212 ,  G02F2201/127 ,  H04B10/505 ,  H04B10/5161 ,  H04B10/541

Abstract: A distributed traveling-wave Mach-Zehnder modulator driver having a plurality of modulation stages that operate cooperatively (in-phase) to provide a signal suitable for use in a 100 Gb/s optical fiber transmitter at power levels that are compatible with conventional semiconductor devices and conventional semiconductor processing is described.

公开(公告)号：US09829765B2

公开(公告)日：2017-11-28

申请号：US15039406

申请日：2014-11-25

Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

Inventor： Karl-Otto Velthaus ,  Marko Rausch

IPC: G02F1/035 ,  G02F1/225 ,  G02F1/21

CPC classification number: G02F1/2255 ,  G02F1/2257 ,  G02F2001/212 ,  G02F2201/127

Abstract: An electro-optical modulator is provided. The electro-optical modulator comprises at least one optical waveguide, an electrode arrangement for applying a voltage across the optical waveguide. The electrode arrangement comprises a first and a second electrical line and at least two terminating resistors terminating the first and the second electrical line. The electrode arrangement comprises at least one capacitive structure that capacitively couples, but galvanically separates the two terminating resistors. The capacitive structure comprises at least two electrically conductive layers physically arranged at a position between the first and the second electrical line, wherein the at least two layers are separated by at least one dielectric layer.