High-Sensitivity Pressure, DP, and Random Rotational Angle Fiber Sensors

• Published in: Green Photonics and Smart Photonics pp. 115 - 140
• Main Authors: Liu, Wen-Fung, Sheng, Hao-Jan
• Format: Book Chapter
• Language: English
• Published: Denmark Routledge 2016; River Publishers
• Edition: 1
• Subjects: Round Plate; FBG; Pressure Cavity; SMF-28 Fiber; pressure sensor; Rotary Position; Pressure Sensitivity; Wavelength Shift; Central Wavelengths; Calculated Reflection Spectrum; Fiber Grating; Central Wavelength Shift; FBG Sensor; Optical Spectrum Analyzer; Coupled Mode Theory; Bragg Wavelength; Anticlockwise; Surrounding Temperature Variation; sensing; Axial Strain; Grating Length; Rotary Position Sensors; Light Weight; Magnetic Repulsive Force; Wave Guide Modes; rotational angle sensor; Rotating Position Variations
• ISBN: 8793379277; 9788793379275
• DOI: 10.1201/9781003338338-8

This chapter is devoted to three different fiber sensors based on the FBG for different sensing applications. The FBG is a kind of excellent optical passive component for a wide range of sensing applications by means of special structure designs and packages. This is due to the small size, immunity to electromagnetic interference, and in-line characteristics, etc. Here, we show several sensing applications by using FGBs, including a lateral pressure sensor, by combining the structure packaging design with the pressure sensitivity to be 10900 times higher than that of using a bare FBG, high-sensitivity temperature-independent DPsensor the sensitivity of 5.27 × 10−1 Mpa−1, and a random rotational angle sensor using two fiber gratings with high accuracy for detecting the rotary position with full around 360° in any direction of a rotor, etc.