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An all-optical threshold device based on the saturable absorption effect of two-dimensional materials, its preparation method and application

A two-dimensional material and threshold technology, applied in the field of optoelectronics, can solve the problems of expensive PPLN semiconductor devices, increased implementation cost and complexity, long nonlinear optical fibers, etc. Effect

Active Publication Date: 2019-04-12
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the action of the XPM effect in PPLN, the frequency-doubled light generated by SHG will be converted to C-band. Compared with the threshold technology based on SHG alone, the cost and complexity of this improved threshold technology are greatly increased.
At the same time, as a new type of semiconductor device, PPLN is extremely expensive, so it is difficult to be widely used
[0006] Therefore, current threshold devices require either long nonlinear fibers or expensive PPLN semiconductor devices

Method used

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  • An all-optical threshold device based on the saturable absorption effect of two-dimensional materials, its preparation method and application
  • An all-optical threshold device based on the saturable absorption effect of two-dimensional materials, its preparation method and application
  • An all-optical threshold device based on the saturable absorption effect of two-dimensional materials, its preparation method and application

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preparation example Construction

[0060] The second aspect of the present invention provides a method for preparing an all-optical threshold device based on the saturable absorption effect of a two-dimensional material, comprising the following steps:

[0061] Coating the two-dimensional material on the surface of the optical waveguide to form a saturable absorber;

[0062] An optical amplifier is provided, and the optical amplifier is connected with a saturable absorber through an optical fiber to form an all-optical threshold device based on the saturable absorption effect of a two-dimensional material.

[0063] In one embodiment of the present invention, the method of coating the two-dimensional material on the surface of the optical waveguide is not limited. For example, the method of coating the two-dimensional material on the surface of the optical waveguide by using optical fiber optical tweezers or tearing tape, these methods are industry-leading methods. Regular selection.

[0064] The preparation me...

Embodiment 1

[0087] An all-optical threshold device based on the saturable absorption effect of two-dimensional materials, including an erbium-doped fiber optical amplifier and a saturable absorber arranged along the light propagation direction, the erbium-doped fiber optical amplifier and the saturable absorber are connected by a single-mode fiber, and the saturated The absorber includes micro-nano fiber and graphene coated on the surface of the micro-nano fiber.

Embodiment 2

[0089] An all-optical threshold device based on the saturable absorption effect of two-dimensional materials, including a semiconductor optical amplifier and a saturable absorber arranged along the light propagation direction, the semiconductor optical amplifier and the saturable absorber are connected by a single-mode optical fiber, and the saturable absorber includes micro Nano-fiber and black phosphorus coated on the surface of micro-nano fiber.

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Abstract

The invention provides an all-optical threshold device based on two-dimension material saturated absorption effect. The device comprises an optical amplifier arranged in the light transmission direction, and a saturable absorber connected with the optical amplifier, wherein the saturable absorber comprises an optical waveguide and a two-dimensional material covering the surface of the optical waveguide. The device is quite simple in structure, non-linear optical fiber or non-linear PPLN semiconductor devices are not needed, and the defects of the prior art that loss is large, stability is poor and cost is high are overcome. By the adoption of the device, the signal to noise ratio of received signals is increased, signal quality is improved, and the reception judgment performance of an optical communication system can be improved. The invention further provides a method for preparing the all-optical threshold device. The method comprises the steps of coating the surface of the optical waveguide with the two-dimensional material to form the saturable absorber, and connecting the optical amplifier with the saturable absorber through optical fiber to form the all-optical threshold device based on two-dimension material saturated absorption effect. The all-optical threshold device can be used for all-optical signal processing.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to an all-optical threshold device based on the saturable absorption effect of a two-dimensional material and its preparation method and application. Background technique [0002] All-optical signal processing is an important development trend and research direction of optical fiber communication systems. In digital optical communication systems based on Return to Zero (RZ) or narrow pulses, such as in Optical Code Division Multiple Access (OCDMA) and Optical Time Division Multiple Access (OTDMA) communications In the system, the optical pulse signal received by the system receiving end often has a certain amount of background noise, such as spontaneous emission noise (ASE noise) introduced by the amplifier, multi-user access interference noise (MAI noise), etc., and this interference noise The existence of will seriously deteriorate the signal-to-noise ratio of the receive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/35
CPCG02F1/3523
Inventor 张晗郑吉林王可杨正华梁志明
Owner SHENZHEN UNIV