Simultaneous measurement of refractive index and temperature using a SPR-based fiber optic sensor
Autor: | Ivan Hernandez-Romano, F. Martinez-Pinon, Jesús Salvador Velázquez-González, David Monzón-Hernández, D. Moreno-Hernández |
---|---|
Rok vydání: | 2017 |
Předmět: |
Optical fiber
Materials science 02 engineering and technology 01 natural sciences Graded-index fiber law.invention 010309 optics Optics law 0103 physical sciences Materials Chemistry Electrical and Electronic Engineering Instrumentation business.industry High-refractive-index polymer Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Normalized frequency (fiber optics) Fiber optic sensor 0210 nano-technology business Step-index profile Refractive index Photonic-crystal fiber |
Zdroj: | Sensors and Actuators B: Chemical. 242:912-920 |
ISSN: | 0925-4005 |
Popis: | A surface plasmon resonance-based fiber-optic sensor for simultaneous measurement of refractive index and temperature of liquid samples is proposed and experimentally demonstrated. The sensor consists of a gold-coated MM-SM-MM optical fiber structure, whose sensitive section was partially covered with polydimethylsiloxane (PDMS) to generate two independent SPR resonance dips in the fiber transmission spectrum. One of the dips is generated by the bare gold-coated fiber section whose wavelength resonance is tuned by the refractive index and temperature of the surrounding medium. The other dip that is exclusively used to monitor the temperature variations of the liquid sample, whose central wavelength at 900 nm corresponds to PDMS refractive index at 20 °C, is produced by the polymerized gold-coated fiber section. The high refractive index and temperature sensitivity achieved, 2323.4 nm/RIU and −2.850 nm/°C respectively, the small size, the ease fabrication process, and the bio-compatibility of the proposed device are appealing characteristics that makes it ideal for practical bio-sensing applications. |
Databáze: | OpenAIRE |
Externí odkaz: |