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Distributed optical fiber sensing device based on phase type chaotic laser and measuring method thereof

A distributed optical fiber and chaotic laser technology, applied in the direction of using optical devices to transmit sensing components, can solve the problems of long sensing distance and high spatial resolution, etc., achieve high spatial resolution, improve signal-to-noise ratio, The effect of highly distributed optical fiber sensing

Active Publication Date: 2022-04-05
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to solve the problem that the existing Brillouin optical correlation domain analysis technology is difficult to balance the long sensing distance and high spatial resolution, the present invention provides a distributed optical fiber sensing device based on phase chaotic laser and its measurement method

Method used

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  • Distributed optical fiber sensing device based on phase type chaotic laser and measuring method thereof
  • Distributed optical fiber sensing device based on phase type chaotic laser and measuring method thereof
  • Distributed optical fiber sensing device based on phase type chaotic laser and measuring method thereof

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Embodiment 1

[0045] Such as figure 1 As shown, Embodiment 1 of the present invention provides a distributed optical fiber sensing device based on phase-type chaotic laser, including: phase-type chaotic laser source 1, optical splitter 2, sideband modulation module 3, continuous optical amplifier 5, the first An optical switch 7, a sensing fiber 8, a high-power optical amplifier 10, a second optical switch 11, a tunable optical filter 12, a first photodetector 13, a signal processor 14, an optical combiner 15, and a second photodetector Device 16; the phase-type chaotic laser source 1 is used to output the phase-chaotic laser, the output end of the phase-type chaotic laser source 1 is connected to the input end of the optical splitter 2, and the first output end of the optical splitter 2 It is used to output the detection light, which is connected to the input end of the first optical switch 7 through the sideband modulation module 3 and the continuous optical amplifier 5 in turn, and the f...

Embodiment 2

[0074] Embodiment 2 of the present invention provides a Brillouin optical correlation domain distributed optical fiber sensing measurement method based on phase chaotic laser, using figure 1 The realization of a Brillouin optical correlation domain distributed optical fiber sensing device based on a phase-type chaotic laser includes the use of the Brillouin optical correlation domain analysis measurement method and the Brillouin optical correlation domain reflection measurement method, and the Brillouin optical correlation domain reflection measurement method is used. The specific steps of the Yuanguang correlation domain analysis measurement method are as follows:

[0075] S101. Divide the phase-type broadband chaotic laser output from the same laser into two beams, which are respectively used as probe light and pump light; turn on the sideband modulation module, switch the first output end of the first optical switch to conduction, and switch the second optical switch The fi...

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Abstract

The invention relates to the field of distributed optical fiber sensing, and discloses a distributed optical fiber sensing device based on phase type chaotic laser and a measuring method of the distributed optical fiber sensing device based on the phase type chaotic laser. The detection light enters the sensing optical fiber through the sideband modulation module, the continuous optical amplifier and the first optical switch in sequence; pump light passes through a high-power optical amplifier and an optical circulator and then is connected with the other end of the sensing optical fiber. A third port of the optical circulator is connected with a first photoelectric detector through a second optical switch and a tunable optical filter. The second output end of the first optical switch and the second output end of the second optical switch are connected with a second detector through a light combiner; and detection signals of the first photoelectric detector and the second photoelectric detector are collected and processed by the signal processor. Noise introduced by light source intensity information can be effectively suppressed, and real-time distributed temperature and strain monitoring with long distance and high spatial resolution considered is realized.

Description

technical field [0001] The invention relates to the field of distributed optical fiber sensing, in particular to a distributed optical fiber sensing device based on a phase type chaotic laser and a measurement method thereof. Background technique [0002] Sensing technology, communication technology, and computer technology constitute the three pillars of the modern information industry, and have become one of the most eye-catching and rapidly developing high-tech in the world today, as well as an important symbol of the development of contemporary science and technology. Distributed optical fiber sensing technology has the advantages of small size, light weight, low cost, high temperature resistance, corrosion resistance, anti-electromagnetic interference, adaptability to harsh environments, and multi-parameter detection. An important reliance on an efficient new infrastructure security network is also a new generation of sensing technology that countries are competing to d...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353
Inventor 王亚辉刘慧张明江牛林洮胡鑫鑫郭阳
Owner TAIYUAN UNIV OF TECH