Optical fiber Brillouin distributed type measuring light path, device and method

A technology for measuring optical paths and measuring methods, which is applied in the direction of using optical devices to transmit sensing components, etc., can solve the problems of low measurement accuracy of optical fibers, and achieve the effects of simplified measurement systems, good separation effects, and simplified systems

Active Publication Date: 2015-07-15
GUANGDONG FUAN TECH DEV
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Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the object of the present invention is to provide an optical fiber Brillouin distributed measurement optical path, device and method to solve the technical defect of low measurement accuracy of the existing optical fiber

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  • Optical fiber Brillouin distributed type measuring light path, device and method
  • Optical fiber Brillouin distributed type measuring light path, device and method
  • Optical fiber Brillouin distributed type measuring light path, device and method

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Embodiment Construction

[0042] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0043] see figure 1 , figure 1 It is a structural schematic diagram of the optical fiber Brillouin distributed measurement optical path provided by the embodiment of the present invention. figure 1 The shown optical fiber Brillouin distributed measurement optical circuit 100 includes a first coupler 111, a second coupler 112, a third coupler 114, a first circulator 115, a first optical channel 120, a second optical channel 130, a transmission Sensing fiber 117 , third optical channel 140 and fourth optical channel 150 .

[0044] Wherein, the two output ports of the first coupler 111 are respectively connected with the input end of the first optical channel 120 and the input end of the second optical channel 130, and the output end of the first optical channel 120 is connected with the input port of the second coupler 112 connect. One output port of...

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Abstract

The embodiment of the invention relates to an optical fiber Brillouin distributed type measuring light path, device and method. The measuring light path comprises a first coupler, a second coupler, a third coupler, a first circulator, a first light channel, a second light channel, a sensing optical fiber, a third light path and a fourth light path, wherein pulse light is input into one end of the sensing optical fiber; continuous light is input into the other end of the sensing optical fiber so as to excite Brillouin scattering. Therefore, anti-Stokes components can be enhanced, if the anti-Stokes light is intense enough, the Stokes light is relatively weak in intensity, the Stokes light can be neglected, the conflict of the input light pulse luminosity and the spatial resolution can be avoided, and a high-precision light filter is not needed.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to an optical fiber Brillouin distributed measurement optical path, device and method. Background technique [0002] Optical fiber sensing technology is a new type of sensing technology, which has the advantages of high measurement accuracy, anti-electromagnetic interference and distributed measurement. The application prospect is broad. At present, the distributed optical fiber sensing system based on Brillouin scattering is mainly divided into three types: based on Brillouin Optical Time Domain Reflectometry (BOTDR) optical fiber sensing technology, based on Brillouin Optical frequency domain analysis (Brillouin Optical Frequency Domain Analysis, BOFDA) fiber optic sensing technology and Brillouin Optical Time Domain Analysis (Brillouin Optical Time Domain Analysis, BOTDA) based fiber optic sensing technology. Among them, BOTDR measures the self-publish...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353
Inventor 曹辉左军林楚涛钟土基蔡静
Owner GUANGDONG FUAN TECH DEV
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