An improving demodulation of interferometric fiber optic sensor technology

2013 ◽  
Author(s):  
Li Gao ◽  
Yong Li ◽  
Zhaorui Chu ◽  
Ming Wu ◽  
Nan Lin
2019 ◽  
Vol 8 (2S3) ◽  
pp. 1418-1431

Fiber Optic sensor technology has become more popular since early 1970’s during which the mechanism of losses from optical fibers was exploited to construct a new class of fiber optic sensors and systems. A novel fiber optic sensor has been developed by connecting a U-shaped glass element of specific dimensions between a light source of 660nm wavelength and an optical power detector by using a couple of PCS optical fibers of 200/230μm diameters of core and cladding respectively. The sensor can be employed to measure several parameters such as Refractive Index, Density, Viscosity, Ultrasonic Velocity, Molar Volume, Molar Refraction, Dielectric Constant, Acoustic Impendence, Adiabatic Compressibility, Viscous Relaxation Time, Intermolecular Free Length, Absorption Coefficient, Gibb’s Free Energy, Free Volume, Internal Pressure and their excess parameters of Toluene and tert-Butanol mixtures at 30℃ temperature and at the operating wavelength of 660nm


1998 ◽  
Author(s):  
Jiaqi Chen ◽  
Heng Dai ◽  
Desheng Jiang ◽  
Dongya Sun

Author(s):  
Evageline Rivera ◽  
Dimos Polyzois ◽  
Douglas J. Thomson ◽  
Ningguang Xu

The development of a fiber optic sensor system for the long-term monitoring of composite glass fiber-reinforced polymer (GFRP) poles will be presented. There is a growing interest in developing techniques for evaluating and monitoring their structural integrity. In the past few years, fiber optic sensor technology has emerged as a promising alternative to conventional methods of monitoring such as strain gauges. Fiber optic sensors can be attached to or embedded in civil structures such as bridges, dams and buildings. They operate by responding to changes in temperature and strain on the structure. The long gauge fiber optic sensor measures the average strain between two points on a structure. Long gauges are interferometric sensors that involve phase matching two optical paths to create a maximum interference pattern at the photodetector. The strain is calculated using the distance in which the reference arm of the interferometer is moved in order to match the optical path lengths.


2000 ◽  
Vol 82 (1-3) ◽  
pp. 40-61 ◽  
Author(s):  
K.T.V. Grattan ◽  
T. Sun

Sign in / Sign up

Export Citation Format

Share Document