Brillouin optical correlation-domain analyzer device and method based on supercontinuum

A supercontinuum and domain analysis technology, applied in the field of Brillouin optical correlation domain analyzer devices, can solve the problems of low spatial resolution and limited sensing distance, and achieve high spatial resolution, high-precision measurement, Easy-to-tune effects

Active Publication Date: 2019-09-17
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0007] The invention adopts the supercontinuum signal as the detection signal, proposes a brand-new Brillouin optical correlation domain analyzer, and solves the problem of limited sensing distance and insufficient spatial resolution in the existing distributed sensing technology based on BOCDA. advanced questions

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  • Brillouin optical correlation-domain analyzer device and method based on supercontinuum

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Embodiment Construction

[0020] Brillouin optical correlation domain analyzer device based on supercontinuum, including sequentially connected quasi-continuous wave Raman fiber laser 1, first optical isolator 2, true wave optical fiber 3, first tunable optical filter 4, Second optical isolator 5, 1×2 fiber coupler 6, first polarization controller 7, microwave signal source 8, high-speed electro-optical modulator 9, variable optical delay line 10, first optical amplifier 11, optical scrambler 12. A third optical isolator 13, a sensing fiber 14, a second polarization controller 15, a second optical amplifier 16, an optical circulator 17, a second tunable optical filter 18, and an optical power detector 19;

[0021] Wherein, the outgoing end of the quasi-continuous wave Raman fiber laser 1 is connected to the incident end of the first optical isolator 2; the outgoing end of the first optical isolator 2 is connected to the incident end of the true wave optical fiber 3 through a single-mode fiber jumper; T...

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Abstract

The invention relates to a distributed optical fiber sensing system, in particular to a Brillouin optical correlation-domain analyzer device and method based on a supercontinuum. The device comprises a quasi-continuous wave Raman fiber laser, a first optical isolator, a real wave fiber, a first tunable optical filter, a second optical isolator, a 1*2 fiber coupler, a first polarization controller, a high-speed electro-optical modulator, a microwave signal source, a variable optical delay line, a first optical amplifier, an optical scrambler, a third optical isolator, a sensing fiber, a second polarization controller, a second optical amplifier, an optical circulator, a second tunable optical filter and an optical power detector. Compared with a BOCDA (Brillouin Optical Correlation-Domain Analysis) system, the Brillouin optical correlation-domain analyzer device and method based on a supercontinuum have the higher spatial resolution and a longer distributed sensing distance; it is worth stating that the supercontinuum has a wider spectrum, meaning that the spatial resolution can reach sub-millimeter level, and the output power of the quasi-continuous Raman fiber laser is high so as to provide enough energy for long-distance sensing.

Description

technical field [0001] The invention relates to a distributed optical fiber sensing system, in particular to a supercontinuum-based Brillouin optical correlation domain analyzer device and method. Background technique [0002] At present, distributed optical fiber sensing technology has been widely used in security monitoring fields such as underground tunnels, aerospace, petrochemical, electric power industry, nuclear industry, civil engineering and military. Since distributed optical fiber sensing technology uses optical fiber as the sensing element and transmission element, temperature and strain measurements at different locations along the entire length of the optical fiber can be realized. Compared with other sensing technologies, the fractional optical fiber based on Brillouin scattering has the advantages of high spatial resolution, long sensing distance, anti-electromagnetic interference, and small error, and is favored by people. [0003] At present, the research ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01B11/16G01K11/322G01K11/324
CPCG01K11/32G01B11/161G01K11/322G01K11/324
Inventor 张建忠张晓程张明江李梦文乔丽君王涛李健吴星亮
Owner TAIYUAN UNIV OF TECH
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