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Hybrid optical fiber sensing system based on phase generated carrier technology

An optical fiber sensing system, a technology for generating a carrier wave in phase, applied in the directions of utilizing wave/particle radiation, measuring ultrasonic/sonic/infrasonic waves, measuring devices, etc., can solve problems such as low sensitivity, achieve distributed measurement, overcome sensing distance and signal-to-noise ratio are difficult to take into account at the same time

Active Publication Date: 2018-09-04
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

The distributed optical fiber sensing system based on phase-generated carrier technology can realize the real-time detection of tens of thousands of channels of full-scale data. low problem

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  • Hybrid optical fiber sensing system based on phase generated carrier technology
  • Hybrid optical fiber sensing system based on phase generated carrier technology
  • Hybrid optical fiber sensing system based on phase generated carrier technology

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Embodiment Construction

[0038] The present disclosure provides a hybrid optical fiber sensing system based on phase generation carrier technology, which combines the characteristics of distributed acoustic sensing technology and fiber laser sensing network technology to realize distributed and highly sensitive weak vibration signal measurement.

[0039] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0040]Certain embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which some but not all embodiments are shown. Indeed, various embodiments of the disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth here; rather, these embodiments are provided so that this disc...

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Abstract

The invention provides a hybrid optical fiber sensing system based on a phase generated carrier technology, which comprises a narrow linewidth laser, a modulator, a pulse generator, an isolator, an erbium-doped optical fiber amplifier, a circulator, an optical fiber grating, a pump source, a wavelength division multiplexer, an optical fiber DFB laser array, a Michelson interferometer, a dense wavelength-division multiplexing module, an avalanche diode detector, a photodetector array, a carrier wave circuit, a data acquisition card, a signal processing module and a display. Through adopting thephase generated carrier technology, distributed acoustic sensing and optical fiber DFB laser array mixed vibration or acoustic signal measurement are realized, the characteristic of high sensitivityof the optical fiber DFB laser array and the characteristic of mass channels of the distributed acoustic sensing technology are fused, and high-sensitivity weak signal distributed measurement is realized.

Description

technical field [0001] The present disclosure relates to the field of distributed optical fiber sensing, in particular to the field of distributed optical fiber sensing for measuring dynamic vibration or acoustic signals, and in particular to a hybrid optical fiber sensing system based on phase generation carrier technology. Background technique [0002] Optical fiber sensing technology is a new technology that uses optical fiber as the medium and light as the carrier to perceive and transmit external signals, which has been rapidly rising along with optical fiber communication technology in the 1970s. This technology has high sensitivity, anti-electromagnetic interference, and good insulation. , corrosion resistance, easy networking and long-distance transmission, etc., are suitable for use in the downhole environment of high temperature and high pressure, strong electromagnetic and strong radiation in oil and gas exploration. Optical fiber vibration sensing is an important...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00
CPCG01H9/004
Inventor 冯圣文徐团伟黄建芬杨洋李芳
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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