Sensitivity optimization of ZnO clad-modified optical fiber humidity sensor by means of tuning the optical fiber waist diameter
| Autor: | mohammad hasan yousefi, Azardokht Mazaheri, Saeed Azad, R. Parvizi, E. Sadeghi |
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| Rok vydání: | 2017 |
| Předmět: |
Multi-mode optical fiber
Optical fiber Materials science business.industry 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Graded-index fiber Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention 010309 optics Optics Fiber Bragg grating law Fiber optic sensor 0103 physical sciences Dispersion-shifted fiber Fiber Electrical and Electronic Engineering 0210 nano-technology business Photonic-crystal fiber |
| Zdroj: | Optics & Laser Technology. 90:96-101 |
| ISSN: | 0030-3992 |
| DOI: | 10.1016/j.optlastec.2016.11.005 |
| Popis: | In this work, the multimode optical fiber size effects on the performances of the clad-modified fiber with ZnO nanorods relative humidity (RH) sensor were experimentally investigated. Simple and controlled chemical etching method through on line monitoring was used to prepare different fiber waist diameter with long length of 15 mm. More precisely, the competition behavior of sensor performances with varying fiber waist diameter was studied to find appropriate size of maximizing evanescent fields. The obtained results revealed that evanescent wave absorption coefficient ( γ ) enhanced more than 10 times compare to bare fiber at the proposed optimum fiber diameter of 28 µm. Also, high linearity and fast recovery time about 7 s was obtained at the proposed fiber waist diameter. Applicable features of the proposed sensor allow this device to be used for humidity sensing applications, especially to be applied in remote sensing technologies. |
| Databáze: | OpenAIRE |
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