scholarly journals Controlling the sensitivity of a non-adiabatic tapered optical fiber for measuring the refractive index using all fiber Sagnac loop interferometer

2011 ◽  
Author(s):  
M. I. Zibaii ◽  
P. A. S. Jorge ◽  
O. Frazão ◽  
H. Latifi
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Tapered Optical Fiber

scholarly journals High sensitivity refractive index sensor based on adiabatic tapered optical fiber deposited with nanofilm by ALD

2015 ◽  
Vol 23 (11) ◽  
pp. 13880 ◽  
Author(s):  
Shan Zhu ◽  
Fufei Pang ◽  
Sujuan Huang ◽  
Fang Zou ◽  
Yanhua Dong ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
High Sensitivity ◽  
Refractive Index Sensor ◽  
Tapered Optical Fiber

scholarly journals Enhancement of the SPR Effect in an Optical Fiber Device Utilizing a Thin Ag Layer and a 3092A Liquid Crystal Mixture

Molecules ◽  
2021 ◽  
Vol 26 (24) ◽  
pp. 7553
Author(s):  
Joanna Korec ◽  
Karol A. Stasiewicz ◽  
Katarzyna Garbat ◽  
Leszek R. Jaroszewicz
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Liquid Crystal ◽  
Optical Fiber ◽  
Surface Plasmon ◽  
Light Propagation ◽  
Resonance Effect ◽  
Surface Plasmon Resonance Effect ◽  
Tapered Optical Fiber ◽  
Crystal Cells

This paper is a continuation of previous work and shows the enhancement of the surface plasmon resonance effect in a tapered optical fiber device. The study investigated liquid crystal cells containing a tapered optical fiber covered with a silver nanolayer, surrounded by a low refractive index liquid crystal in terms of the properties of light propagation in the taper structure. Silver films with a thickness of d = 10 nm were deposited on the tapered waist area. Measurements were performed at room temperature; liquid crystal steering voltage U from 0 to 200 V, with and without any amplitude modulation with a frequency of f = 5 Hz, and the wavelength λ ranged from 550 to 1200 nm. A significant influence of the initial arrangement of liquid crystals molecules on light propagation was observed. Three types of liquid crystal cells—orthogonal, parallel, and twist—were considered. During the measurements, resonant peaks were obtained—the position of which can also be controlled by the type of liquid crystal cells and the steering voltage. Based on the obtained results, the best parameters, such as highest peak’s width reduction, and the highest SNR value were received for twisted cells. In addition, the present work was compared with the previous work and showed the possibility of improving properties of the manufactured probes, and consequently, the surface plasmon resonance effect. In the presented paper, the novelty is mainly focused on the used materials as well as suitable changes in applied technological parameters. In contrast to gold, silver is characterized by different optic and dielectric properties, e.g., refractive index, extension coefficient, and permittivity, which results in changes in the light propagation and the SPR wavelengths.

Adiabatic tapered optical fiber Fabry-Perot structure as a refractive index sensor

2017 ◽  
Author(s):  
O. R. Ranjbar-Naeini ◽  
Z. Chenari ◽  
P. Zarafshani ◽  
F. Jafari ◽  
H. Latifi
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Refractive Index Sensor ◽  
Fabry Perot ◽  
Tapered Optical Fiber
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