Abstract
This paper demonstrates a method for the development of stepped-metal coating on optical fiber Bragg grating. The paper also analyzes the dual-peak resonance restructured by the nickel/copper stepped-metal coating. According to the coefficients of linear thermal expansion of the coatings, the modeling and experimental analysis is categorized into three types: Type A, Type B, and Type C. We denote the temperature sensitivity difference between the two peaks as ΔKT for Type A, ΔK′T for Type B, and ΔK″T for Type C. The experimental results show that ΔKT, ΔK′T, and ΔK″T are 2.1 pm/°C, 6.5 pm/°C, and 0.8 pm/°C, respectively. The model analysis and the experimental results all show the Type B stepped-metal coating causes the most obvious temperature sensitivity difference between the two resonance peaks. The stepped-metal coating on the same one Bragg grating can restructure the single resonance into dual-peak resonance with different temperature sensing, and Type B can be used to develop a dual-parameter optical fiber Bragg grating sensor at one location which can measure two physical parameters simultaneously.
Highlights
Optical fiber Bragg grating (FBG) sensing technology has become one of the most attractive sensing technologies in a variety of fields, such as the optical fiber smart structures [1,2,3,4]
On the other hand, the dual-peak resonance will provide an opportunity to develop the sensor with the capability of measuring both strain and temperature simultaneously using one optical fiber Bragg grating
Thesingle-mode simulation describes the experimental of the temperature sensing of the models analyze the dual-peak resonance restructured by thermal strains and demonstrate the FBG with the Ni/Cu stepped-metal coating by electroless-plating and electroplating
Summary
Optical fiber Bragg grating (FBG) sensing technology has become one of the most attractive sensing technologies in a variety of fields, such as the optical fiber smart structures [1,2,3,4]. FBGs’ dual-peak resonance restructured by thermal strains induced by stepped-metal coating on the same. Thesingle-mode simulation describes the experimental of the temperature sensing of the models analyze the dual-peak resonance restructured by thermal strains and demonstrate the FBG with the Ni/Cu stepped-metal coating by electroless-plating and electroplating. Bragg grating can be models analyze dual-peak resonance restructured thermal andfiber demonstrate the influence used for a dual-parameter sensor at one location which can measure two physical parameters of the coating parameters on the two peaks. This kind of optical fiber Bragg grating can be used for a simultaneously. Dual-parameter sensor at one location which can measure two physical parameters simultaneously
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