Highly sensitive fiber grating chemical sensors: An effective alternative to atomic absorption spectroscopy
| Autor: | Jyoti F. Akki, Lata S. Laxmeshwar, Mangesh S. Jadhav, Prasad Raikar, U. S. Raikar, Jitendra Kumar, Om Prakash |
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| Rok vydání: | 2017 |
| Předmět: |
Fiber gratings
Optical fiber Materials science Period (periodic table) business.industry chemistry.chemical_element 02 engineering and technology Zinc Grating 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials law.invention Wavelength Optics chemistry law Sensitivity (control systems) Electrical and Electronic Engineering 0210 nano-technology Atomic absorption spectroscopy business |
| Zdroj: | Optics & Laser Technology. 91:27-31 |
| ISSN: | 0030-3992 |
| DOI: | 10.1016/j.optlastec.2016.11.025 |
| Popis: | Accuracy in quantitative determination of trace elements like Zinc, present in drinking water in ppm level, is a big challenge and optical fiber gratings as chemical sensors may provide a promising solution to overcome the same. This paper presents design of two simple chemical sensors based on the principle of shift in characteristic wavelength of gratings with change in their effective refractive index, to measure the concentration of Zinc in drinking water using etched short period grating (FBG) and Long period grating (LPG) respectively. Three samples of drinking water from different places have been examined for presence of Zinc. Further, the results obtained by our sensors have also been verified with the results obtained by a standard method, Atomic absorption spectroscopy (AAS). The whole experiment has been performed by fixing the fibers in a horizontal position with the sensor regions at the center of the fibers, making it less prone to disturbance and breaking. The sensitivity of LPG sensor is about 205 times that of the FBG sensor. A few advantages of Fiber grating sensors, besides their regular features, over AAS have also been discussed, that make our sensors potential alternatives for existing techniques in determination of trace elements in drinking water. |
| Databáze: | OpenAIRE |
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