High-Linearity Refractive Index Sensor Based on Analyte-Filled Defect Hollow Core Bragg Fiber
| Autor: | Kunjie Zheng, Liang Shang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
All-silica fiber
PHOSFOS Materials science business.industry Dynamic range Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology Cladding (fiber optics) 01 natural sciences Graded-index fiber Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics Fiber Bragg grating 0103 physical sciences Optoelectronics Electrical and Electronic Engineering 0210 nano-technology business Step-index profile Photonic-crystal fiber |
| Zdroj: | IEEE Photonics Technology Letters. 29:1391-1394 |
| ISSN: | 1941-0174 1041-1135 |
| DOI: | 10.1109/lpt.2017.2723519 |
| Popis: | We propose a high-linearity refractive index (RI) sensor based on an analyte-filled defect hollow core Bragg fiber (DHCBF) for large dynamic ranges. A resonant wavelength induced by the transverse coupling between core modes and defect modes is used as the characteristic wavelength for realizing a high-linearity RI sensor. The numerical results show that the linear correlation between characteristic wavelength and analyte RI can be significantly improved by optimizing structural parameters of a defect layer, which would be beneficial to the enlargement of dynamic measurement range. Furthermore, we numerically demonstrated an RI sensor with the sensitivity of 2062 nm/RIU and the adjusted R-Square value of 0.99967 in the measurement range of 1.324-1.432, by using an analyte-filled DHCBF with a low RI-contrast cladding. Compared with that based on a standard HCBF, our proposed high-linearity RI sensor can achieve high sensitivity in a larger dynamic range. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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