Simultaneous multi-point measurement of refractive index using optical fiber sensor based on an arrayed-waveguide grating

2012 ◽  
Author(s):  
Ji-Hui Li ◽  
Chun-Liu Zhao ◽  
Chong-Ke Ji
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Arrayed Waveguide Grating ◽  
Waveguide Grating ◽  
Point Measurement ◽  
Arrayed Waveguide

scholarly journals Gold Enhanced Hemoglobin Interaction in a Fabry–Pérot Based Optical Fiber Sensor for Measurement of Blood Refractive Index

2018 ◽  
Vol 36 (4) ◽  
pp. 1118-1124 ◽  
Author(s):  
Charusluk Viphavakit ◽  
Sinead O Keeffe ◽  
Minghong Yang ◽  
Stefan Andersson-Engels ◽  
Elfed Lewis
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Fabry Perot

Refractive index and temperature sensing characteristics of an optical fiber sensor based on a tapered single mode fiber/polarization maintaining fiber

2016 ◽  
Vol 14 (5) ◽  
pp. 050604-50608
Author(s):  
Zaihang Yang Zaihang Yang ◽  
Hao Sun Hao Sun ◽  
Tingting Gang Tingting Gang ◽  
Nan Liu Nan Liu ◽  
Jiacheng Li Jiacheng Li ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Optical Fiber Sensor ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Temperature Sensing ◽  
Fiber Sensor ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining ◽  
Sensing Characteristics

scholarly journals Fabrication of a Bare Optical Fiber-Based Biosensor

Micromachines ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 522
Author(s):  
Yu-Jun Zhang ◽  
Jin-Cherng Hsu ◽  
Jia-Huey Tsao ◽  
Yung-Shin Sun
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Gold Film ◽  
Optical Fiber Sensor ◽  
Binding Kinetics ◽  
Fiber Sensor ◽  
Sensor Surface ◽  
Material Interface ◽  
Kinetics Of

A bare optical fiber-based biosensor is proposed for measuring the refractive index of different liquids and the binding kinetics of biomolecules to the sensor surface. This optical fiber sensor is based on the Kretschmann’s configuration to attain total internal reflection (TIR) for surface plasmon resonance (SPR) excitation. One end of the bare optical fiber is coated with a gold film. By guiding the light source from the other end into the optical fiber, the light is reflected from the gold-deposited end and the surface evanescent wave is excited in the gold film-transparent material interface. Methanol and ethanol solutions with different refractive indices are used for measuring the corresponding changes in the peak values of the spectra and calculating the corresponding sensitivities. These values are experimentally determined to be in the order of 10−4~10−5 refractive index unit (RIU). Binding of proteins onto the sensor surface is also monitored in real time to obtain the binding kinetics. We believe that, in the future, this optical fiber sensor can serve as a useful biosensor for in situ measurement of allergens, antibody–antigen interactions, and even circulating tumor cells in the blood.

scholarly journals Hg2+ Optical Fiber Sensor Based on LSPR with PDDA-Templated AuNPs and CS/PAA Bilayers

2020 ◽  
Vol 10 (14) ◽  
pp. 4845
Author(s):  
Xiujuan Zhong ◽  
Li Ma ◽  
Guolu Yin ◽  
Mengyu Gan ◽  
Yong Wei
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Localized Surface Plasmon Resonance ◽  
Optical Fiber Sensor ◽  
Fiber Surface ◽  
Fiber Sensor ◽  
Localized Surface Plasmon ◽  
Peak Wavelength ◽  
Post Process ◽  
Flame Brushing

An optical fiber localized surface plasmon resonance (LSPR) sensor was proposed and experimentally demonstrated to detect Hg2+ ions by functionalizing the optical fiber surface with gold nanoparticles (AuNPs) and chitosan (CS)/poly acrylic acid (PAA) bilayers. A flame-brushing technology was proposed to post-process the polydimethyl diallyl ammonium chloride(PDDA)-templated nanoparticles, avoiding the aggregation of AuNPs and achieving well-dispersed AuNPs arrays. LSPR stimulated by the AuNPs is sensitive to changes in the refractive index induced by Hg2+ ions absorption on the CS/PAA bilayers. Experimental results demonstrated that the LSPR peak wavelength linearly shifts with the concentrations of Hg2+ ions from 1 to 30 μM with a sensitivity of around 0.51 nm/ppm. The sensor also exhibits good specificity and longtime stability.

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