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Distributed optical fiber dynamic strain sensing device and method based on broadband chaotic laser

A distributed optical fiber, chaotic laser technology, applied in the direction of using optical devices, measuring devices, instruments, etc., to achieve the effect of avoiding crosstalk, high spatial resolution, and extending the sensing distance

Active Publication Date: 2020-02-11
TAIYUAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0006] The present invention aims to solve the difficulty that the existing distributed optical fiber sensing technology cannot realize long-distance and high-resolution real-time monitoring of large-scale dynamic strain, and provides a distributed optical fiber dynamic strain sensing device based on broadband chaotic laser and method

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  • Distributed optical fiber dynamic strain sensing device and method based on broadband chaotic laser

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Embodiment Construction

[0024] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] A distributed optical fiber dynamic strain sensing device based on broadband chaotic laser, such as figure 1 As shown, it includes a broadband chaotic laser source 1, a 1×2 fiber coupler 2, a first polarization controller 3, a high-speed electro-optic modulator 4, a programmable optical delay generator 5, a first optical amplifier 6, and an optical scrambler 7. Optical isolator 8, sensing fiber 9, optical circulator 10, second optical amplifier 11, semiconductor optical amplifier 12, second polarization controller 13, pulse signal generator 14, broadband microwave signal source 15, tunable optical Filter 18, photodetector 17, high-speed data acquisition and analysis system 16.

[0026] Wherein, the output end of broadband chaotic laser source 1 is connected with the input end of 1×2 fiber coupler 2; the first output end of 1×2 fiber co...

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Abstract

The invention discloses a broadband chaotic laser-based distributed optical fiber dynamic strain sensing device, which comprises a broadband chaotic laser source (1), a 1*2 optical fiber coupler (2),a first polarization controller (3), a high-speed electro-optic modulator (4), a programmable optical delay generator (5), a first optical amplifier (6), an optical polarizer (7), an optical isolator(8), a sensing optical fiber (9), an optical circulator (10), a second optical amplifier (11), a semiconductor optical amplifier (12), a second polarization controller (13), a pulse signal generator (14), a broadband microwave signal source (15), a high speed data acquisition and analysis system (16), a photoelectric detector (17), and a tunable optical filter (18). The pulse signal generator is used to generate high speed pulse signals, synchronous control on the broadband microwave signal source, the semiconductor optical amplifier and the high speed data acquisition and analysis system is realized, and the measurement accuracy and the real-time performance of the sensing system are ensured.

Description

technical field [0001] The invention relates to a distributed optical fiber sensing system, in particular to a distributed optical fiber dynamic strain sensing device and method based on broadband chaotic laser. Background technique [0002] Distributed optical fiber sensing uses optical fibers as sensing elements and transmission elements, which can realize continuous distributed measurement of physical parameters such as temperature and strain at different positions of the entire optical fiber. As an important part of the health and safety monitoring network of large-scale building structures, distributed optical fiber sensing technology has been widely used in various fields such as petrochemical, civil engineering, electrical transmission, aerospace, transportation, etc., temperature, vibration and strain, etc. Real-time and high-precision monitoring of multiple parameters has become a major research hotspot. [0003] At present, the distributed optical fiber sensing sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/16
CPCG01B11/16
Inventor 张明江王亚辉张建忠张倩李梦文乔丽君
Owner TAIYUAN UNIV OF TECH
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