Silicon-based coarse wavelength division device

A wavelength division device and silicon-based technology, applied in the field of integrated photonics, can solve the problems of large size, large loss, and large crosstalk of coarse wavelength division multiplexers/demultiplexers, and achieve small crosstalk, small loss, and high-quality devices. The effect of performance enhancement

Active Publication Date: 2017-02-15
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] Aiming at the defects of the prior art, the object of the present invention is to provide a silicon-based waveguide coarse wavelength division device, which aims to solve the problems of large size, large loss and large crosstalk of the existing coarse wavelength division multiplexer / demultiplexer

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  • Silicon-based coarse wavelength division device
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  • Silicon-based coarse wavelength division device

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] In order to achieve the above purpose, the present invention adopts SWG structure, utilizes optimization algorithm, precisely adjusts the structural composition of the silicon-based waveguide on the sub-wavelength scale, and realizes a coarse wavelength division multiplexer / demultiplexer with low loss, low crosstalk and extremely small size . Because the design of SWG's device structure is on the sub-wavelength level (hundreds of nanometers), which is far smaller than the design scale of conventional WDM devices (tens or even hundreds of microns), the size of the WDM device proposed by the p...

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Abstract

The invention discloses a silicon-based coarse wavelength division device. The device comprises an input waveguide, a multimode waveguide with cylindrical apertures distributed on the surface, a first output waveguide and a second output waveguide. The input end of the multimode waveguide is connected with the input waveguide. The first output end of the multimode waveguide is connected with the first output waveguide. The second output end of the multimode waveguide is connected with the second output waveguide. Light is injected from the input waveguide into the multimode waveguide. The light transmission path and direction are controlled by the cylindrical apertures in the multimode waveguide. Light of different wavelengths have different travel paths, which realizes wavelength separation. The first output waveguide and the second output waveguide are used to transmit light of different wavelengths. According to the invention, an SWG structure is used to precisely adjust the structural composition of the silicon-based waveguides on sub-wavelength scale, so that the silicon-based coarse wavelength division device has the advantages of low loss, low crosstalk and extremely small size.

Description

technical field [0001] The invention belongs to the field of integrated photonics, in particular to a coarse wavelength division multiplexer / demultiplexer based on a silicon-based planar optical waveguide. Background technique [0002] Coarse Wavelength Division Multiplexing (CWDM) is a low-cost wavelength division multiplexing technology widely used in metropolitan area networks. It uses an optical multiplexer to multiplex the optical signals transmitted in different optical fibers into one optical fiber for transmission, and at the receiving end of the link, uses a demultiplexer to transmit the decomposed optical signals of different wavelengths to the corresponding receiving device. [0003] Coarse wavelength division multiplexer / demultiplexer based on silicon-based planar waveguide has the characteristics of simple structure, high integration, and compatibility with CMOS, and is attracting more and more attention. The current conventional silicon-based wavelength divis...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/12
CPCG02B6/12007
Inventor 张敏明周飞亚卢鲁璐子刘德明
Owner HUAZHONG UNIV OF SCI & TECH
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