Dynamic Brillouin optical time domain analysis system based on pump pulse frequency sweeping

An optical time domain analysis and pump pulse technology, which is applied in the direction of using optical devices to transmit sensing components, instruments, measuring devices, etc. Noise ratio, the effect of reducing demand

Active Publication Date: 2018-03-06
成都塔科光电技术有限公司
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[0004] The invention provides a dynamic Brillouin optical time-domain analysis system based on pump pulse freque

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  • Dynamic Brillouin optical time domain analysis system based on pump pulse frequency sweeping
  • Dynamic Brillouin optical time domain analysis system based on pump pulse frequency sweeping
  • Dynamic Brillouin optical time domain analysis system based on pump pulse frequency sweeping

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Embodiment Construction

[0032] 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.

[0033] 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.

[0034] see figure 1, is a s...

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Abstract

The invention provides a dynamic Brillouin optical time domain analysis system based on pump pulse frequency sweeping. The system divides laser signals output by a laser into two paths of signals. Onepath of signals is modulated into probe light by a microwave source, the high-frequency part of the probe light is removed by a first filter, and the filtered probe light is transmitted to a sensingfiber. For the other path of laser signals, a corresponding output waveform is generated by an arbitrary waveform generator according to preset rules, the path of laser signals is modulated into a pump pulse by using the output waveform, and part of energy in the pump pulse is transferred to the probe light based on stimulated Brillouin scattering. Then, the frequency difference between the pump pulse and the probe light is scanned to get the Brillouin gain spectrum of the sensing fiber, and the Brillouin frequency shift is obtained by fitting. Therefore, the measurement time of the Brillouinoptical time domain analysis system is reduced, and dynamic analysis of Brillouin optical time domain is realized.

Description

technical field [0001] The invention belongs to the field of distributed optical fiber sensing, and in particular relates to a dynamic Brillouin optical time domain analysis system based on pumping pulse frequency sweep. Background technique [0002] Distributed optical fiber sensing is a new type of sensing technology, and the sensing distance can range from hundreds of meters to hundreds of kilometers. Due to the advantages of anti-electromagnetic interference, high sensitivity and long sensing distance, distributed optical fiber sensing has been widely used in the fields of oil pipeline monitoring and perimeter placement. [0003] A widely used type of distributed optical fiber sensing is the Brillouin optical time domain analysis system, which is an analysis method based on stimulated Brillouin scattering. Specifically, the probe light and the pump light are respectively input at both ends of the sensing fiber. When the frequency difference of the two beams of light is ...

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Application Information

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IPC IPC(8): G01D5/353
CPCG01D5/35364
Inventor 朱涛
Owner 成都塔科光电技术有限公司
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