Transactions of Nanjing University of Aeronautics & Astronautics
Temperature Sensor Based on Fiber Bragg Grating Embedded in SNS Fiber Structure
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Abstract:
A novel fiber temperature sensor based on multimode interference theory is proposed and experimentally demonstrated. The sensing head is formed by a fiber bragg grating (FBG) connected with single-mode-no core-single-mode fiber(SNS) fiber structure which consists of two sections of single mode fiber and no-core fiber.Using such a structure, not only the reflective measurement can be realized, but also the need for a gold-plated film can be avoided at the end of the fiber to enhance the reflected light signal. More importantly, the sensitivity is increased by 4 times as compared with the conventional FBG temperature sensor according to the experimental results, and it also provides the development space for multi-parameters monitoring.
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This work was supported by the National Natural Science Foundation of China (No.U1537102), the Fund of Aeronautics Science (No.20152852036,20170252004), the Fundamental Research Funds for the Central Universities (NS2016004), the Shanghai Academy of Spaceflight Technology (No.SAST2015062), and the State Key Laboratory of Mechanics and Control of Mechanical Structures (Nanjing University of Aeronautics and astronautics)(No. MCMS-0516K01)
Clc Number:
TN253
CHINA AERO-SCIENCES
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