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Distributed Optical Fiber Sensor Technology and Utilizations in Smart Grid

Author: LiZuoZuo
Tutor: LiuWen
School: Huazhong University of Science and Technology
Course: Optical Engineering
Keywords: Smart Grid Fiber Optic Sensors Distributed Bragg grating Brillouin Optical Time Domain Reflectometer Brillouin optical time domain analyzer Microring
CLC: TP212.14
Type: Master's thesis
Year: 2011
Downloads: 84
Quote: 0
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The papers to the smart grid current heating devices for cable , transformer winding temperature , stress measurement monitoring background mainly discusses fiber grating temperature sensors , Brillouin Optical Time Domain Reflectometer temperature , stress distributed sensors , cloth Brillouin optical time domain analyzer temperature , stress distributed sensor three fiber-optic sensing system . Papers each chapter details a range of applications , the working principle of the sensor , as well as the advantages and disadvantages , and the invention patent or utility model system design improvements of the existing system to a more simple structure , better cost-effective or superior performance . Its feasibility is verified by experiments . In order to obtain a better spatial resolution and temperature , stress resolution , the paper design a novel optical fiber sensing system based on the Brillouin optical time domain analysis instrument . Linewidth of the laser output light and, in view of the special requirements of the system on the light source , the design based microring external cavity narrow linewidth distributed feedback semiconductor laser with weak coupling and control loss lt; 100kHz, and by simulation experiments were performed to verify the design structure can reach the output of the narrow linewidth of about 88kHz . Further, in order to make the light source system has a wide tunable wavelength range , it is possible to simultaneously achieve a wide range of wavelengths between coarse in determining the wavelength about the characteristics of the fine adjustment , the paper further design a two micro-ring array external cavity structure , the use of micro-ring \Finally, based on micro- ring light source device monolithically integrated design , the use of InP as a substrate material , and integrated two narrow linewidth DFB laser and optical delay line can be used as a scheme to reduce the the commercial BOTDA system cost .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor > Physical sensors > Light sensor
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