Ultra-remote distributed fiber raman photons temperature sensor integrated with raman amplifier

A distributed optical fiber and temperature sensor technology, which is applied in the direction of physical/chemical change thermometers, optical devices to transmit sensing components, thermometers, etc., to improve signal-to-noise ratio, improve measurement distance and temperature measurement accuracy, and overcome fiber loss Effect
CN101162175AInactive Publication Date: 2008-04-16CHINA JILIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA JILIANG UNIV
Publication Date
2008-04-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention discloses an ultra-long-range distributed fiber Raman photon temperature sensor of an integrated Raman amplifier, and comprises a distributed fiber Raman photon temperature sensor, a distributed fiber Raman amplifier and a fiber grating narrowband reflecting filter. The distributed fiber Raman amplifier is adopted to be embedded into the distributed fiber Raman photon temperature sensor; the gain of the amplifier is used to overcome fiber loss, strengthen the intensity of spontaneous Raman scattering light in the fiber, improve signal-to-noise ratio of the distributed fiber Raman photon temperature sensor system, augment the transmission distance of the distributed fiber Raman photon temperature sensor and improve temperature-measuring precision. With the fiber stimulated Raman scattering effect, the fiber spontaneous Raman scattering effect and the optical time domain reflection principle, the invention skillfully merges the technologies of the distributed fiber Raman amplifier and the distributed fiber Raman photon temperature sensor and achieves the ultra-long-range distributed fiber Raman temperature sensor.
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Description

technical field

[0001] The invention relates to an ultra-long-distance distributed optical fiber Raman photon temperature sensor integrated with a Raman amplifier, belonging to the technical field of optical fiber sensors. Background technique

[0002] In the distributed optical fiber sensor, the distributed optical fiber Raman photon temperature sensor composed of the principle that the intensity of the spontaneous Raman scattered light of the optical fiber is modulated by temperature and the principle of optical time domain reflection has a broad application market. The existing distributed optical fiber Raman photonic temperature sensors at home and abroad are limited by the signal-to-noise ratio of the system, and the maximum measurement distance is 30km. The present inventor has used the principle of optical fiber spontaneous Raman scattering amplification to improve the signal-to-noise ratio of the system (Zhang Zaixuan, Wang Jianfeng, Liu Honglin, Yu Xiangdong, etc., ...

Claims

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