Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Electro-optical device

A technology of electro-optical devices and electrodes, which is applied in the directions of instruments, optics, nonlinear optics, etc., and can solve problems such as electrical crosstalk and frequency band narrowing

Pending Publication Date: 2021-10-01
TDK CORPARATION
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the optical modulator disclosed in Patent Document 1, there are two folded signal electrodes, and since the signal electrodes are brought close to each other by the foldback, electrical crosstalk occurs between elements, thereby causing a disadvantage of narrowing the frequency band. situation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electro-optical device
  • Electro-optical device
  • Electro-optical device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0036] figure 1 It is a plan view of the optical modulator 100 according to the first embodiment of the present invention. figure 2 is along figure 1 Cross-sectional view of the light modulator at line A-A' in .

[0037] like figure 1 and figure 2 As shown, the optical modulator 100 as the electro-optical device according to this embodiment includes an optical waveguide 10 and an upper electrode 7 arranged on the optical waveguide 10 .

[0038] The optical waveguide 10 is formed by folding back on a plane. For example, in the present embodiment, the optical waveguide 10 is formed by folding back twice on a plane, and includes first to third linear portions 10e arranged in parallel to each other. 1 、10e 2 、10e 3 , connecting the first straight line portion 10e 1 and the second linear portion 10e 2 The first bend 10f 1 , and connecting the second linear portion 10e 2 and the third straight section 10e 3 The second bend 10f 1 . However, the present invention is no...

no. 2 approach

[0058] image 3 is a cross-sectional view of the optical modulator according to the second embodiment of the present invention. like image 3 As shown, the light modulator according to the second embodiment is different from the light modulator 100 according to the first embodiment in that between adjacent parts, that is, from the first adjacent part 7a 1 and the third adjacent portion 7b 1 The group consisting of, and the second adjacent portion 7a 2 and the fourth adjacent portion 7b 2 The ground conductor 8a is arranged between the formed groups. Specifically, as image 3 As shown, in the first adjacent part 7a 1 and the second adjacent portion 7a 2 The ground conductor 8a is arranged between them. Other configurations of the optical modulator according to the present embodiment are the same as those of the optical modulator 100 according to the first embodiment, and thus detailed description thereof will be omitted.

[0059] In addition, in this embodiment, the me...

no. 3 approach

[0067] Figure 7 It is a plan view of the light modulator 200 according to the third embodiment of the present invention. Figure 8 is along Figure 7 Cross-sectional view of the light modulator at line A-A' in . like Figure 7 and Figure 8 As shown, the optical modulator 200 according to this embodiment has four optical waveguides 10 and the first upper electrode 7 a and the second upper electrode 7 b arranged on the optical waveguides 10 . However, the number of optical waveguides 10 is not particularly limited, and there may be 1 to 3 or 5 or more optical waveguides 10 .

[0068] The optical waveguide 10 is a Mach-Zehnder optical waveguide having a first optical waveguide 10a and a second optical waveguide 10b. There are a plurality of first and second optical waveguides 10a, 10b branched from one input optical waveguide 10i by a demultiplexer 10c, and the plurality of first and second optical waveguides 10a, 10b are collected in a plurality of optical waveguides via ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
relative permittivityaaaaaaaaaa
Login to View More

Abstract

The invention relates to an electro-optical device. The electro-optical device includes an optical waveguide and an upper electrode disposed on the optical waveguide, wherein the optical waveguide is formed by folding back on a plane, the upper electrode has adjacent portions by folding back of the optical waveguide, and an upper layer between the adjacent portions is provided with a metal layer higher than the upper electrode. Alternatively, the electro-optical device has a plurality of Mach-Zehnder optical waveguides, wherein each Mach-Zehnder optical waveguide has a first optical waveguide and a second optical waveguide, the first upper electrode is disposed on the first optical waveguide, the second upper electrode is disposed on the second optical waveguide, and an upper layer between the first upper electrode and the second upper electrode, which is higher than the upper electrode, has a metal layer. According to the present invention, the electro-optical device in which electrical crosstalk between elements can be suppressed and a wide band can be achieved can be provided.

Description

technical field [0001] The invention relates to an electro-optical device used in the field of optical communication and optical measurement. Background technique [0002] With the popularity of the Internet, the communication volume has increased dramatically, and the importance of optical fiber communication has become very high. Optical fiber communication converts electrical signals into optical signals, and transmits optical signals through optical fibers, and has the characteristics of broadband, low loss, anti-noise, etc. [0003] As a method of converting an electrical signal into an optical signal, a direct modulation method using a semiconductor laser and an external modulation method using an optical modulator are known. Direct modulation does not require an optical modulator and is low in cost, but it has limitations for high-speed modulation. In high-speed and long-distance applications, an external modulation method is used. [0004] As an optical modulator, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/035G02F1/03
CPCG02F1/035G02F1/0305G02F1/212G02F1/225G02F2202/20
Inventor 长瀬健司A·R·M·宾拉奥王进武田家裕
Owner TDK CORPARATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com