Long-distance optical fiber detection system based on optical fiber random laser

A long-distance optical fiber and random laser technology, which is applied in the testing of optical fiber/optical waveguide equipment, machine/structural component testing, optical instrument testing, etc. It can solve the problems of difficult identification of fiber types and inaccurate positioning of long-distance breakpoints, etc. Achieve the effects of wide application range, enhanced visibility and simple operation

Active Publication Date: 2021-02-23
UNIV OF ELECTRONIC SCI & TECH OF CHINA +2
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  • Abstract
  • Description
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Problems solved by technology

[0005] The invention discloses a long-distance optical fiber detection system based on optical fiber random laser, aiming to solve the problems of inaccurate positioning of long-distance breakpoints and difficult identification of optical fiber types

Method used

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  • Long-distance optical fiber detection system based on optical fiber random laser
  • Long-distance optical fiber detection system based on optical fiber random laser

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Experimental program
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Effect test

Embodiment 1

[0018] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0019] see figure 1 , a long-distance optical fiber inspection system based on optical fiber random laser, its structure includes optical fiber pump module 1, optical fiber combiner 2, ytterbium-doped optical fiber 3, pump stripper 4, optical fiber to be tested 5 and optical fiber random laser mirror 6. Wherein, the output end of the fiber pump module 1 is connected to the pumping port of the fiber combiner 2, the signal end of the fiber combiner 2 is connected to the fiber random laser mirror 6, and the output end of the fiber combiner 2 is connected to the doped The input end of the ytterbium fiber 3 is connected, the output end of the ytterbium-doped fiber 3 is connected with the input end of the pump stripper 4 for removing excess pump light, and the output end of the pump stripper 4 is connected with the optical fiber 5 to be tested. Br...

Embodiment 2

[0028] refer to figure 2 , figure 2 It shows the process of the present invention to produce visible light color selection in the demonstration fiber, where the two pump photons are both at 1064nm, the abscissa corresponds to the frequency shift of the nascent photon, and the ordinate is the comprehensive dispersion evaluation result. Under certain conditions, two pump photons will excite two newborn photons. When the sum of the material dispersion and waveguide dispersion of the two nascent photons in the optical fiber to be tested is 0, stable excitation will be achieved and stable visible light will be generated. For G.652.D fiber, its zero dispersion frequency shift is 6650cm －1 , corresponding to the newborn visible light wavelength of 621nm.

[0029] The specific four-wave mixing process is: 1064nm+1064nm=621nm+3700nm.

[0030] Among them, the 621nm light is orange light.

[0031] Therefore, if the system designed by the present invention detects that the optical ...

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Abstract

The invention discloses a long-distance optical fiber detection system based on optical fiber random laser, relates to the field of optical fiber detection, and aims to solve the problems of long-distance breakpoint positioning and optical fiber type identification at the same time. The system comprises an optical fiber pumping module, an optical fiber beam combiner, an ytterbium-doped optical fiber, a pumping stripper, an optical fiber to be detected and an optical fiber random laser reflector. The output end of the optical fiber pumping module is connected with the pumping end of the opticalfiber beam combiner, the signal end of the optical fiber beam combiner is connected with the optical fiber random laser reflector, the output end of the optical fiber beam combiner is connected withthe input end of the ytterbium-doped optical fiber, the output end of the ytterbium-doped optical fiber is connected with the input end of the pumping stripper used for removing redundant pumping light, and the output end of the pumping stripper is connected with the optical fiber to be detected. The system provided by the invention has the advantages that the operation is simple, the optical fiber model identification result is visual, and the long-distance positioning of the breakpoint can be realized.

Description

technical field [0001] The invention relates to the field of optical fiber detection, in particular to a long-distance optical fiber detection system based on optical fiber random laser. Background technique [0002] Optical fibers based on quartz glass fibers have the advantages of anti-electromagnetic radiation interference, high temperature resistance, good electrical insulation, low loss, and intrinsic safety. They have been widely used in the fields of optical fiber communication and optical fiber sensing. Generally, the design life of an ordinary optical fiber cable is 20 years. During use, it is inevitable that the optical fiber will be broken due to defects in optical fiber production, man-made damage, natural environment and other factors, which will cause interruption of communication and sensing services. During fiber maintenance, it is often necessary to find breaks and re-splice them. Before optical fiber fusion, it is necessary to confirm the type of optical f...

Claims

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Application Information

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IPC IPC(8): G01M11/00
CPCG01M11/3127
Inventor 王子南林圣淘饶云江吴明埝栗鸣
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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