Temperature-Independent Fiber Bragg Grating Tilt Sensor

Micro & Optical Tech Letters

Jin

et al. 2010

A novel fiber Bragg grating (FBG) tilt sensor is proposed to detect the magnitude and the direction of a two‐dimensional inclination by using four FBGs. High angle sensitivity and measurement resolution have been achieved, and the temperature effect has been eliminated completely without additional temperature compensation schemes. Experimental results verified the feasibility of the proposed idea. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2250–2252, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25425

Temperature‐independent fiber bragg grating tilt sensor

Micro & Optical Tech Letters

Jin

et al. 2010

Temperature‐insensitive 2D fiber Bragg grating TILT sensor

Micro & Optical Tech Letters

Shao

et al. 2012

A novel temperature‐insensitive tilt sensor is proposed based on two fiber Bragg gratings (FBGs), which were embedded in a cylindrical cantilever‐based pendulum in two orthogonal planes. Tilt‐induced bending of the pendulum changes bandwidths and hence reflected optical powers of the two FBGs. Intensity‐measurements of two‐dimensional (2D) tilt angles can be realized without temperature dependence. Theoretical analysis and experimental verification have been carried out. Sensitivity of 42.97 nW/° with measurement accuracy of 0.27° has been achieved over a range up to ±15°. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:344–346, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27281

Intensity-modulated optical fiber sensors based on chirped-fiber Bragg gratings

2011

Photonic Sens

Intensity-modulated fiber Bragg grating (FBG) sensors, compared with normal wavelength-encoding FBG sensors, can reduce the cost of sensor system significantly by using cost-efficient optical power detection devices, instead of expensive wavelength measurement instruments. Chirped-FBG (CFBG) based intensity-modulated sensors show potential applications in various sensing areas due to their many advantages, including inherent independence of temperature, high measurement speed, and low cost, in addition to the merits of all fiber-optic sensors. This paper theoretically studies the sensing principle of CFBG-based intensity-modulated sensors and briefly reviews their recent progress in measurement of displacement, acceleration, and tilt angle.