Concentration and refractive index sensor for methanol using short period grating fiber

FBG sensors for seismic control and detection in extradosed bridges

“…As a definition, the Bragg grating is a spectral filter that allows a part of the incident signal to be reflected and etched in the transmitted signal, see Figure 1. The central wavelength of this reflected and etched part is (Kang et al, 2005;Kerrouche et al, 2009;Li et al, 2011;Lu et al, 2008;Palaniappan et al, 2007;Piot, 2009;Raikar et al, 2011;Rodrigues et al, 2010;Shen and Shen, 2008;Sun et al, 2007;Vorathin et al, 2019):…”

“…Also this proposed SHMS able to indicate the potential and the degree of such effect. On the other hand, the first Bridge that used the FBG technology for its structural monitoring is the Beddington Trail in Canada (Raikar et al, 2011) where the manufacturers used 20 FBG sensors to measure the temperatures and strains.…”

Design of multiplexed fiber optic chemical sensing system using clad-removable optical fibers

“…Also, the sensor node did not need to be re-coated or re-cladded, as in the cases of [16,21,26,27,30], and did not require installation of any external equipment as in the cases of [12,15]. The sensor preparation only involved the removal of an external protective layer.…”

“…Assemblies of several FBG sensors have been used for refractive index (RI) measurements as the basis for liquid chemical sensing [21][22][23][24]. However, they have expensive signal processing and interrogation technology, pose problems of temperature and strain signal division, and sophisticated fabrication is required.…”

Characteristics Analysis of Chemical Concentration Sensor Based on Three-layer FBG

“…Fiber Bragg grating (FBG) has many virtues such as resistant to electromagnetic interference, high insulating, corrosion resistance small bulk, low weight, high sensitivity, absolute code of wavelength, compare with fiber, easy to reuse into network, etc. The liquid concentration sensor takes FBG as its sensitive element has positive research significance and potential application prospect [1,2]. The fiber Bragg grating sensor plays an important role in the measurement of liquid substance.…”