Vector optical chirp chain Brillouin time domain analysis system

A time-domain analysis and vector technology, which is applied in the direction of transmitting sensing components, measuring devices, instruments, etc. by using optical devices, can solve the problems of high data collection times, weak signals, and low sensing accuracy, and achieve improved signal-to-noise ratio, Effect of increased sensing speed, high optical nonlinearity threshold

Active Publication Date: 2020-11-17
CHONGQING UNIV
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Problems solved by technology

[0004] The invention provides a vector optical chirp chain Brillouin time-domain analysis system to solve the problems of high data collection times, low sensing accuracy and weak signal in the current optical Brillouin time-domain analysis

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  • Vector optical chirp chain Brillouin time domain analysis system
  • Vector optical chirp chain Brillouin time domain analysis system
  • Vector optical chirp chain Brillouin time domain analysis system

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Embodiment Construction

[0047] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and understandable, the following describes the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings For further detailed explanation.

[0048] In the description of the present invention, unless otherwise specified and limited, it should be noted that the term "connection" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be Directly connected or indirectly connected through an intermediary, those skilled in the art can understand the specific meanings of the above terms according to specific situations.

[0049] see figure 1 As show...

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Abstract

The invention provides a vector optical chirp chain Brillouin time domain analysis system which comprises a laser, the laser is connected with a coupler, and the two output ends of the coupler are connected with the first input ends of a first electro-optical modulator and a second electro-optical modulator respectively. Two output ends of the arbitrary waveform generator are respectively connected with second input ends of the first electro-optical modulator and the second electro-optical modulator, and an output end of the first electro-optical modulator is connected with an input end of thefirst dense wavelength division multiplexer. The two output ends of the first dense wavelength division multiplexer are connected with the input end of the polarization beam combiner through the first polarization controller and the second polarization controller respectively, and the output end of the polarization beam combiner is connected with the first end of the sensing optical fiber. The output end of the second electro-optical modulator is connected with the first end of the circulator, the second end of the circulator is connected with the second end of the sensing optical fiber, thethird end of the circulator is connected with the input end of the second dense wavelength division multiplexer, and the two output ends of the second dense wavelength division multiplexer are connected with the first photoelectric detector and the second photoelectric detector respectively.

Description

technical field [0001] The invention belongs to the field of optical fiber sensing, and in particular relates to a Brillouin time-domain analysis system of a vector optical chirp chain. Background technique [0002] Distributed optical fiber sensing technology based on Brillouin scattering can perform distributed measurement of temperature or strain with high sensitivity and accuracy on long-distance sensing optical fibers. These systems have advantages such as low cost, corrosion resistance, durability, and immunity to electromagnetic interference, which make them an online monitoring tool for large structures such as power lines, bridges, and oil and gas pipelines. [0003] Among them, the Brillouin optical time-domain analysis system is a mature technology. Its principle is that the detection light interacts with the back-propagating pump pulse light through the nonlinear effect of stimulated Brillouin scattering. The Brillouin spectrum distribution of the fiber under te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/34
CPCG01D5/344
Inventor 张敬栋朱涛郑华吴昊庭郭南
Owner CHONGQING UNIV
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