Polarization sensitive distributive optical frequency domain reflection disturbance sensor and demodulation method

An optical frequency domain reflection and sensing device technology, applied in the field of optical fiber sensing, can solve the problems of low spatial resolution, short test distance, single point separation, etc., and achieve the effect of high sensitivity and high signal-to-noise ratio
CN102322880BActive Publication Date: 2013-06-05TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2013-06-05

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Abstract

This invention relates to a distributed disturbance sensing device based on polarization sensitive optical frequency domain reflectometry (OFDR) and the related demodulation thereof. The device, adopting OFDR, polarization controlling and analysis techniques, consists of a ultra-narrow linewidth tunable laser source module, polarization generating and polarization splitting balanced detecting module, laser source optical frequency and phase monitoring module, high-speed optical switch and so on to establish a large-scale and long-distance optical sensing network. The demodulation method consists of analysis the polarization information from sensing optical fiber, the method of suppressing and compensating of the non-linear optical frequency and the laser phase noise, super-resolution analyzing, advanced denoising method and the polarization information analysis method based on Jones and Mueller's matrices using distributed wave plate model of optical fiber.
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Description

technical field

[0001] The invention belongs to the technical field of optical fiber sensing. The invention is applied to long-distance optical fiber distributed disturbance and stress sensing, and relates to a polarization-sensitive distributed optical frequency domain reflection disturbance sensing device and method. Background technique

[0002] At present, the main technical solutions for long-distance optical fiber distributed disturbance and stress sensing include laser interference method, phase-sensitive optical time-domain reflection method and polarization-sensitive optical time-domain reflection method. These methods all have short test distances (<80km) , This topic is aimed at the current all-fiber distributed disturbance sensing technology: short test distance (less than 80km), low spatial resolution (greater than 10m), single-point separation and other defects.

[0003] Due to the shortcomings of the above-mentioned technologies, a polarization-sensitive o...

Claims

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