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http://dx.doi.org/10.5916/jkosme.2009.33.6.925

Development of submersion sensors using multi-mode fibers spliced with a fiber Bragg grating  

Sohn, Kyung-Rak (한국해양대학교 컴퓨터제어전자통신공학부)
Key, Kwang-Hyun (한국해양대학교 대학원 전자통신공학과)
Shim, Joon-Hwan (한국해양대학교 컴퓨터제어전자통신공학부)
Cho, Seok-Je (한국해양대학교 컴퓨터제어전자통신공학부)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.33, no.6, 2009 , pp. 925-931 More about this Journal
Abstract
This paper reports a preliminary experimental investigation and characterization of an optical fiber-based submersion sensor system for applications in water flooding and leakage. The sensor system comprises a multi-mode fiber spliced with fiber Bragg grating and an intensity-based interrogator. Submersion tests were conducted in water-air and Glycerin-air environments. By the refractive index of the fiber-probe surrounding materials, the reflectance and the detecting power level is determined. When the probe is dipped into the water, the optical output power dramatically decreases from -7.5dBm to -17.5dBm. But, the center of Bragg wavelength is not affected in spite of external material changes. Temporal response characteristics of the sensor system is investigated to verify the real-time reaction. When the probe is immersed into the liquid, there is no transition time.
Keywords
Fiber optic sensors; Submersion sensors; Reflectance; Multi-mode fiber; Fiber Bragg grating;
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