A fiber-optic solution concentration sensor based on a pressure-induced long-period grating(LPG)in a composite optical waveguide is proposed.The composite waveguide consists of a standard single-mode fiber with its co...A fiber-optic solution concentration sensor based on a pressure-induced long-period grating(LPG)in a composite optical waveguide is proposed.The composite waveguide consists of a standard single-mode fiber with its coating stripped away,a teflon-cannula and the medium to be measured.An experiment has been carried out to measure the concentration of the sodium chloride(NaCl)solution.The results show that the central resonant wavelengths of the LPG shift towards shorter wavelengths when the concentration of the NaCl solution increases.The central resonant wavelength of the LP_(14) cladding mode exhibits a total blue shift of 4.13 nm in the NaCl solution concentration range of 0–25%,which corresponds to a sensing sensitivity of 0.17 nm/%.展开更多
基金The National Nature Science Foundation of China(Nos.61575037,61420021)the China Scholarship Council(No.201606075076)the Innovation Funds of Collaboration Innovation Center of Electronic Materials and Devices(No.ICEM2015-2001)
基金The National Basic Research Program of China(No.2012CB315701,2012CB315702and 2011CB301705)the National Nature Science Foundation of China(No.60925019,61090393,61205109,61377037)+1 种基金the Science and Technology Innovation Team of Sichuan Province(No.2011JTD0001)the Fundamental Research Funds for the Central Universities(No.ZYGX2011J052)
基金Supported by the National Natural Science Foundation of China under Grant Nos 60925019 and 61090393the National Basic Research Program of China(973 Program)under Grant No 2011CB301705the Research Foundation in University of Electronic Science and Technology of China under Grant Nos ZYGX2011J052 and ZYGX2011J051.
文摘A fiber-optic solution concentration sensor based on a pressure-induced long-period grating(LPG)in a composite optical waveguide is proposed.The composite waveguide consists of a standard single-mode fiber with its coating stripped away,a teflon-cannula and the medium to be measured.An experiment has been carried out to measure the concentration of the sodium chloride(NaCl)solution.The results show that the central resonant wavelengths of the LPG shift towards shorter wavelengths when the concentration of the NaCl solution increases.The central resonant wavelength of the LP_(14) cladding mode exhibits a total blue shift of 4.13 nm in the NaCl solution concentration range of 0–25%,which corresponds to a sensing sensitivity of 0.17 nm/%.
