Optical Fiber Sensors Conference 

About: Optical Fiber Sensors Conference is an academic conference. The conference publishes majorly in the area(s): Fiber optic sensor & Optical fiber. Over the lifetime, 954 publications have been published by the conference receiving 3076 citations.

High sensitivity sensors utilising characteristics of dispersion-turning-point of long-period gratings in B/Ge co-doped fibre

Abstract: Systematically investigated the waveguide dispersion characteristics of LPFGs. It has been revealed that the coupled cladding modes resonating in the dispersion-turning-point region are intrinsically sensitive to the external perturbation. Thus, LPFG-based application devices requiring good stability should avoid this region. On the other hand, this mode ultra-sensitive-zone can be explored to realise sensors and tuneable filters of high efficiency.

Enhanced sensitivity fibre optic long period grating temperature sensor

Abstract: In this paper we demonstrate a simple technique for forming a fibre optic long period grating (LPG) with enhanced temperature sensitivity by surrounding the LPG with a material with a high thermo-optic coefficient, thus exploiting both the temperature and external refractive index sensitivity of the LPG. The operating temperature and measurement ranges are determined by the attenuation band that is monitored, and the refractive index and the thermo-optic coefficient of the surrounding material.

Optical fiber grating sensor networks and their application in electric power facilities, aerospace and geotechnical engineering

Abstract: Five German companies in collaboration with IPHT developed potential low-cost strain, vibration and temperature sensor systems based on fiber Bragg grating arrays. Performance has been demonstrated in field tests for generators, aircraft, and rock-bolts.

Multi-parameter measurements using optical fibre long period gratings for indoor air quality monitoring

Abstract: An array of three long period gratings (LPGs) fabricated in a single optical fibre and multiplexed in the wavelength domain was used to measure simultaneously temperature, relative humidity (RH) and volatile organic compounds (VOCs). Each LPG sensor was designed to optimize its response to a desired measurand. The LPGs were fabricated with periods such that they operated at or near the phase matching turning point. The sensors were calibrated in the laboratory and the simultaneous measurement of the key indoor air quality parameters was undertaken in laboratory and office environments. It was demonstrated successfully that the data produced by the LPG sensor array under real conditions was in a good agreement with that produced by commercially available sensors. Further, the potential application of fibre optic sensors for VOCs detection at high levels has been demonstrated.

Triaxial Bragg grating accelerometer

Abstract: A triaxial fiber Bragg gratings (FBG) accelerometer has been designed and tested yielding encouraging results. In the first prototype, only the vertical axis was instrumented. Tests have shown a good linearity in the amplitude response and that, in principle, temperature compensation can be achieved due to the use of FBG sensors with 180/spl deg/ out-of-phase response. The frequency range of the first prototype was limited to the cut-off frequency of the optoelectronic circuits employed in the experiments, however, tests up to 800 Hz were conducted and the FRF of the accelerometer may be considered satisfactory.