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Three-order Raman amplification technology-based Brillouin optical time domain analysis system

A technology of optical time domain analysis and technology, applied in the direction of using optical devices, thermometers with physical/chemical changes, and using optical devices to transmit sensing components, etc., can solve low signal-to-noise ratio areas, affect the consistency of sensing quality, Signal light distribution fluctuations and other issues, to achieve the effect of improving spatial resolution, improving the consistency of the whole process, and improving the sensing performance

Active Publication Date: 2012-06-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

The downside is that the spatial resolution is only 50m
[0007] However, for a transmission distance of >100km, the distribution of signal light also fluctuates significantly, and a large area of ​​low signal-to-noise ratio reappears, seriously affecting the consistency of the sensing quality throughout the process

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  • Three-order Raman amplification technology-based Brillouin optical time domain analysis system
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  • Three-order Raman amplification technology-based Brillouin optical time domain analysis system

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] see figure 1 , a Brillouin optical time-domain analysis system based on third-order Raman amplification technology, including a laser 1, a first isolator 2, a coupler 3, a first polarization controller 4, a second polarization controller 16, a first electro-optic modulation Device 6, second electro-optic modulator 17, polarization scrambler 8, first erbium-doped fiber amplifier 9, second erbium-doped fiber amplifier 18, optical circulator 12, detector 10, tunable filter 11, data acquisition and processing system 7. Waveform generator 5, microwave generator 13, third-order Raman amplification system, wherein the laser 1 is used to generate Brillouin pump waves and detection waves, the line width of the light source is 1KHz, output polarization < 5%, there are two erbium-doped fiber amplifiers, the first erbium-doped fiber amplifier 9 is ...

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Abstract

The invention discloses a three-order Raman amplification technology-based Brillouin optical time domain analysis system which comprises a laser, a coupler, a first electro-optic modulator, a second electro-optic modulator, a polarization scrambler, a first erbium-doped fiber amplifier (EDFA), a second EDFA, an optical circulator, a tunable filter, a detector, a data acquisition and processing system and a three-order Raman amplification system. According to the three-order Raman amplification technology-based Brillouin optical time domain analysis system, by applying the three-order Raman amplification, so that the scope of a low signal-to-noise ratio is greatly reduced (about 30 km), and the longer-distance high-quality transduction can be achieved.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to a Brillouin optical time domain analysis system. Background technique [0002] The distributed optical fiber sensing technology based on Brillouin scattering has higher measurement accuracy, measurement range and spatial resolution in temperature and strain measurement than other sensing technologies, so this technology is widely used in buildings, oil pipelines and power facilities. It has broad application prospects in health detection and fire early warning. It is generally divided into two types: Brillouin Optical Time Domain Reflectometer (BOTDR) and Brillouin Optical Time Domain Analyzer (BOTDA). The former uses the phenomenon of spontaneous Brillouin scattering and can perform single-ended measurement, but the detection signal is weak and the detection distance is limited; the latter uses the phenomenon of stimulated Brillouin scattering, the detection signa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353G01K11/32G01B11/16G01K11/3206G01K11/322
Inventor 饶云江贾新鸿王子南张伟利
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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