Distributed Raman amplification-based Brillouin optical time domain analysis system

An optical time domain analysis and Raman amplification technology, applied in the field of optical fibers, can solve the problems affecting the measurement resolution and intensity drop of the back end of the optical fiber, and achieve the effect of ensuring temperature/strain resolution and improving distribution uniformity.
CN101762290AInactive Publication Date: 2010-06-30UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2010-06-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a bidirectional distributed Raman amplification-based Brillouin optical time domain analysis system. The system comprises a laser 1, a coupler 3, a first electro-optical modulator 6, a second electro-optical modulator 17, a polarization scrambler 8, a first erbium-doped fiber amplifier 9, a second erbium-doped fiber amplifier 18, an optical circulator 12, a tunable filter 11, a detector 10, a data acquisition processing system 7 and a Raman amplification system. In the system, the bidirectional distributed Raman amplification technology is applied in the Brillouin optical time domain analysis system to improve the distribution evenness of Brillouin detection signal gain on a whole section of a sensing fiber, so that the temperature / strain resolution of the whole section of the sensing fiber can be ensured, and long distance distribution sensing in true sense can be realized.
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Description

technical field

[0001] The invention relates to the field of optical fiber technology, in particular to a method for improving the performance of a Brillouin optical time-domain analysis system by applying a distributed Raman amplification technology. Background technique

[0002] Distributed fiber optic sensor is a new type of sensing technology that has been studied in recent years. Because it can sense the spatial distribution of strain and temperature on the transmission path and information that changes with time, distributed fiber optic sensors are used in multi-storey buildings, bridges, dams, aircraft, It has an important application prospect in the safety detection of major structures and equipment such as oil wells.

[0003] Distributed sensing technology based on Brillouin scattering has higher measurement accuracy, measurement range and spatial resolution in temperature and strain measurement than other sensing technologies, so this technology has been widely con...

Claims

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