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Optical switching device based on waveguide matrix structure

A technology of waveguide matrix and matrix structure, applied in the field of optical communication, can solve the problems of CDC-ROADM miniaturization and low power consumption, huge waveguide size and graphic distribution area, etc.

Active Publication Date: 2021-01-08
GUANGXUN SCI & TECH WUHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the embodiments of the present invention is that the huge waveguide size and pattern distribution area will bring huge challenges to the subsequent coupling packaging, and it is likely that it will not be able to meet the trend of CDC-ROADM miniaturization and low power consumption

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  • Optical switching device based on waveguide matrix structure
  • Optical switching device based on waveguide matrix structure
  • Optical switching device based on waveguide matrix structure

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Embodiment 1

[0074]An embodiment of the present invention provides an optical switching device based on a waveguide matrix structure, such as image 3 As shown, the n×n optical switching device includes:

[0075] n+1 levels of optical switch components, wherein each level of optical switch components is composed of n optical switch units or 2n optical switch units;

[0076] Wherein, among the first n-1 optical switch assemblies, each optical switch unit is equipped with a first-stage optical splitter assembly, and the optical splitter assembly is composed of n 1×2 optical splitters ;

[0077] The optical switch components of each level are cascaded, the optical splitter components of each level are cascaded, and the optical switch components of each level are coupled with the optical splitter components of each level.

[0078] The embodiment of the present invention adopts waveguide integration technology, and optimizes the waveguide structure of the current mainstream optical switching ...

Embodiment 2

[0122] The embodiment of the present invention provides a specific implementation for supporting the switch unit and the optical splitter in Embodiment 1. In the embodiment of the present invention, the switch unit in the corresponding switch assembly and the optical splitter can be designed with a waveguide chip structure, starting from the basic functional unit of the waveguide chip. The design structure of the waveguide chip in the embodiment of the present invention is composed of two basic functional units, namely a 2×2 optical switch unit based on a semi-cascaded Mach-Zehnder interferometer (MZI for short) structure and an optical splitter based on a single 1×2 MZI structure .

[0123] a. Optical switch unit

[0124] Generally, a single MZI structure consists of two input ports, two output ports, and two stages of 3dB couplers before and after. The optical power of the input optical field is equally divided into two parts in the first-stage coupler, and enters the seco...

Embodiment 3

[0132] In the embodiment of the present invention, the working mechanism of the optical switch unit and the optical splitter developed in the second embodiment is mainly explained at the level of working principle.

[0133] How the beam splitter works:

[0134] According to the light splitting principle of MZI, adjust the coupling phase θ1, θ2 of the two couplers before and after and the phase difference ⊿Φ of the interference arm to adjust the splitting ratio of the upper and lower output channels of the MZI, as shown in Figure 7 shown.

[0135] The working principle of the semi-cascaded MZI switch unit:

[0136] Such as Image 6 As shown, when the heating electrodes of the front and rear MZIs are not working, the optical signal enters from input port 1 and outputs from output port 1; enters from input port 2 and outputs from output port 2. At this time, the MZI is closed to the optical signal of the input port 1, and is in a through state to the optical signal of the inp...

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Abstract

The invention relates to the technical field of optical communication, and provides an optical switching device based on a waveguide matrix structure. The n * n optical switching device comprises n +1 stages of optical switch assemblies, and each stage of optical switch assembly is composed of n optical switch units or 2n optical switch units, wherein in the first n-1 stages of optical switch assemblies, a first-stage optical branching device assembly is arranged in front of each stage of optical switch unit in a matched mode, and each optical branching device assembly is composed of n 1 * 2optical branching devices; the optical switch assemblies of each stage are cascaded, the optical branching device assemblies of each stage are cascaded, and the optical switch assemblies of each stageare coupled with the optical branching device assemblies of each stage. According to the invention, the complexity of the optical switching unit can be reduced, and the number of waveguide intersection points can also be reduced; not only is the packaging requirement for miniaturization of the CDCROADM met, but also the performance of the module is improved.

Description

【Technical field】 [0001] The invention relates to the technical field of optical communication, in particular to an optical switching device based on a waveguide matrix structure. 【Background technique】 [0002] In terms of specific business requirements for 5G development in the future, network management and control will become bottlenecks due to the exponential increase in the number of network nodes. As the core system of network nodes, ROADM can realize optical layer direct communication between network nodes, greatly reducing signal delay and meeting the development direction of 5G. As the core node of the backbone network and the metropolitan area network, the ROADM system must have three characteristics: wavelength-independent (colorless), direction-independent (directionless), and competition-independent (contentionless) in the 5G era. How to design the optical waveguide matrix structure in the optical switching unit is the key to realize the "three noes" character...

Claims

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Application Information

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IPC IPC(8): H04Q11/00G02B6/293
CPCH04Q11/0005G02B6/29362H04Q2011/0007
Inventor 李迪徐晓辉胡毅
Owner GUANGXUN SCI & TECH WUHAN
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