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Period polarized magnesium doped lithium niobate all light switch and preparation process thereof

A technology of magnesium lithium niobate and periodic polarization, which is used in optics, nonlinear optics, electromagnetic wave transmission systems, etc. requirements and other issues, to achieve the best performance and application prospects, control the small optical power, and improve the output switching efficiency.

Inactive Publication Date: 2003-08-06
NANKAI UNIV
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the mechanical optical switch was developed earlier, and the response speed of this type of switch is low, generally requiring milliseconds. Although it can meet the requirements of the test work, it cannot meet the requirements of audio and video transmission systems, let alone meet the needs of high-speed optical fiber communication.

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  • Period polarized magnesium doped lithium niobate all light switch and preparation process thereof

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Embodiment Construction

[0010] The technical scheme of the present invention will be specifically described below in conjunction with the accompanying drawings: as shown in the accompanying drawings, it is a periodic poled magnesium-doped lithium niobate all-optical switch, which uses a high-magnesium-doped lithium niobate crystal along the three crystals of the crystal. Cut to the bottom in directions X, Y, and Z, the size is ~20×25×1.0 mm, and the concentration of doped magnesium is >5 mol%. The crystal is polished and processed, the fan-shaped variable periodic polarization and periodic inversion grating structure is fabricated, and the proton exchange annealing process is performed to obtain an all-optical switch of annealed proton exchange optical waveguide. The specific preparation process steps are as follows:

[0011] (1) Optically polish the ±Z surface of the wafer

[0012] (2) Photolithography on the +Z surface of the wafer

[0013] (3) Etch a metal Al electrode according to the designed m...

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Abstract

The invention refers to a new periodic polarized magnesian lithium niobate acid all optical switch and the making method. The project: use the high-magnesian biobic acid crystal, cut into the pieces,polish, polarize and etch the piece to make the reverse grating area and the proton anneal exchange optical wave-guide, and thus get the all-optical switch. it can realize the THz modulation.

Description

technical field [0001] The invention relates to the invention of an optical switch, in particular to the design of a novel periodic poled magnesium-doped lithium niobate all-optical switch, which belongs to the field of optical communication devices. technical background [0002] Fiber-intensive multi-wavelength division multiplexing (DWDM) can increase the transmission capacity of optical fibers. Complex high-speed optical transmission networks containing multiple nodes require effective all-optical switches to directly switch and turn off optical information to prevent wavelength blocking and allow wavelengths to be reused. , Improve the flexibility of network management. There are roughly two types of optical switches currently used in optical information processing technology: mechanical and optical. Among them, the mechanical optical switch was developed earlier, and the response speed of this type of switch is low, generally requiring milliseconds. Although it can mee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/035H04J14/02
Inventor 陈云琳楼慈波刘晓娟许京军陈绍林黄自恒
Owner NANKAI UNIV