Passive mode-locking fiber laser delay feedback chaotization system based on graphene

A fiber laser and passive mode-locking technology, which is applied in the direction of lasers, optical transmission systems, laser components, etc., can solve the problems of saturation absorption loss and low damage threshold, and achieve high peak power, easy synchronization, and high damage threshold Effect

Inactive Publication Date: 2013-01-16
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the small radius and large surface tension of SWCNTs make the damage threshold lower; when used as a saturable absorber, it is inevitable to bind SWCNTs materials, catalyze, adhere to amorphous carbon, etc., which may lead to the loss of saturable absorption.

Method used

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  • Passive mode-locking fiber laser delay feedback chaotization system based on graphene
  • Passive mode-locking fiber laser delay feedback chaotization system based on graphene
  • Passive mode-locking fiber laser delay feedback chaotization system based on graphene

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Embodiment 1

[0021] The present invention is based on the graphene-based passive mode-locked fiber laser delay feedback chaotic system structure as follows figure 2 shown. figure 2 Among them, 1 is the pump laser, which can use the 1480nm Raman fiber laser produced by IPG PHOTONICS CORPORATION in the United States, with an output power of 1W; 2 is the wavelength division multiplexing fiber coupler, which can be produced by Shanghai Hanyu Optical Fiber Communication Technology Co., Ltd. Fused tapered 1480 / 1550nm pump light wavelength division multiplexing coupler; 3 is the first fiber coupler, which can use the 1×2 standard single-mode fiber coupler produced by Shanghai Hanyu Optical Fiber Communication Technology Co., Ltd., with a splitting ratio of 1 : 9; 4 is the second fiber coupler, which can use the 1×2 standard single-mode fiber coupler produced by Shanghai Hanyu Optical Fiber Communication Technology Co., Ltd., with a splitting ratio of 3:7; 5 is the polarization controller, which...

Embodiment 2

[0024] image 3 The structure of the graphene mode-locking device 9 of the present invention is given. image 3 Among them, 13 is a graphene sheet; 14 is a FC / PC optical fiber connector, and the standard FC / PC optical fiber connector produced by Shanghai Hanyu Optical Fiber Communication Technology Co., Ltd. can be used.

[0025] Graphene mode-locking device 9 comprises graphene sheet 13 and FC / PC optical fiber connector 14 on both sides of graphene sheet 13, and graphene sheet 13 and FC / PC optical fiber connector 14 constitute graphene mode-locking device 9 for producing lock mode ultrashort light pulses.

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Abstract

The invention belongs to the technical field of optical communication devices and relates to a passive mode-locking fiber laser delay feedback chaotization system based on graphene, comprising a pumping laser (1), a wavelength division multiplexing fiber coupler (2), a first fiber coupler (3), a mode-locking device (9), an erbium-doped fiber (7), a polarization controller (5), an isolator (6), a second fiber coupler (4), a photodetector (10), an A / D conversion circuit (11), a single chip microcomputer (15), an RS 232 interface (16) and an optical delay line (12), wherein the optical delay line (12) receives control signals and carries out delay feedback to enable the whole system to be in a chaotization state, and the mode-locking device (9) is a graphene mode-locking device. The invention can generate a femto-second order optical pulse without an external modulation source, has the advantages of easy synchronization, high output pulse peak power, easy installation and operation and simple structure, and the like and can realize all-fiber integration and create the foundation of realizing chaotization synchronization and secrete communication.

Description

technical field [0001] The invention belongs to the technical field of optical communication devices, in particular to a graphene mode-locked fiber laser chaotic system with a delay feedback device. Background technique [0002] The advancement of communication technology is an important manifestation of the development of the national economy. The carrier wave of the commonly used communication transmission technology is a sine wave or other specific signal with specific parameters. Any company or individual can produce optical fiber communication equipment by themselves as long as they understand the specifications of the communication protocol. , to achieve the purpose of communicating with each other. However, in the national defense construction, the transmission of many information involves the confidential content of the country, and this unsafe transmission method makes the information easy to leak. The development of nonlinear chaos synchronization theory provides ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/00H04B10/25H01S3/10H04B10/85
Inventor 高博田小建吴戈汝玉星单江东
Owner JILIN UNIV
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