scholarly journals Modified plastic optical fiber with CNT and graphene oxide nanostructured coatings for ethanol liquid sensing

2017 ◽  
Vol 25 (5) ◽  
pp. 5509 ◽  
Author(s):  
A.L. Khalaf ◽  
P.T. Arasu ◽  
H.N. Lim ◽  
S. Paiman ◽  
N.A. Yusof ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Optical Fiber ◽  
Nanostructured Coatings ◽  
Plastic Optical Fiber ◽  
Liquid Sensing

Liquid level measurement based on multi-S-bend plastic optical fiber

Sensor Review ◽  
2019 ◽  
Vol 39 (4) ◽  
pp. 522-524 ◽  
Author(s):  
Ning Jing
Keyword(s):  
Optical Fiber ◽  
Measurement Range ◽  
Propagation Loss ◽  
Liquid Level ◽  
Plastic Optical Fiber ◽  
Content Type ◽  
Level Measurement ◽  
Level Sensor ◽  
Liquid Sensing ◽  
Liquid Level Sensor

Purpose This paper aims to propose a liquid level sensor with a multi-S-bend plastic optical fiber. Design/methodology/approach The principle of liquid sensing used is based on the leakage of higher modes out of the fiber and repeated regeneration in the following bend sections. Therefore, a propagation loss was introduced in every bend section of the fiber with the loss depending on the refractive index of the environment. Findings Therefore, a continue shift in the liquid level can be detected by observing changes in the propagation loss of the fiber. The sensor features compactness and a flexible resolution. Originality/value Compared with the exited ones, the sensor has capability of continue liquid measurement and a greater measurement range.

Graphene oxide filled optical fiber micro-cavity based temperature sensor

2019 ◽  
Author(s):  
Nelia Alberto ◽  
M. Fatima Domingues ◽  
Gil Goncalves ◽  
Paulo Antunes ◽  
Paula Marques ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Optical Fiber ◽  
Temperature Sensor ◽  
Micro Cavity

scholarly journals Characterization of Mach Zehnder interferometer plastic optical fiber for intensity-based temperature sensor

2021 ◽  
Vol 1918 (2) ◽  
pp. 022010
Author(s):  
Ian Yulianti ◽  
N M Dharma Putra ◽  
Fianti ◽  
H Rumiana ◽  
Z A F Latif ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Temperature Sensor ◽  
Zehnder Interferometer ◽  
Plastic Optical Fiber ◽  
Mach Zehnder Interferometer

scholarly journals Thermally Stimulated Desorption Optical Fiber-Based Interrogation System: An Analysis of Graphene Oxide Layers’ Stability

Photonics ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 70
Author(s):  
Maria Raposo ◽  
Carlota Xavier ◽  
Catarina Monteiro ◽  
Susana Silva ◽  
Orlando Frazão ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Optical Fiber ◽  
Optical Fiber Sensor ◽  
Layer By Layer ◽  
Film Stability ◽  
A Value ◽  
Device Reliability ◽  
Sensor Devices ◽  
Lbl Films ◽  
The Stability

Thin graphene oxide (GO) film layers are being widely used as sensing layers in different types of electrical and optical sensor devices. GO layers are particularly popular because of their tuned interface reflectivity. The stability of GO layers is fundamental for sensor device reliability, particularly in complex aqueous environments such as wastewater. In this work, the stability of GO layers in layer-by-layer (LbL) films of polyethyleneimine (PEI) and GO was investigated. The results led to the following conclusions: PEI/GO films grow linearly with the number of bilayers as long as the adsorption time is kept constant; the adsorption kinetics of a GO layer follow the behavior of the adsorption of polyelectrolytes; and the interaction associated with the growth of these films is of the ionic type since the desorption activation energy has a value of 119 ± 17 kJ/mol. Therefore, it is possible to conclude that PEI/GO films are suitable for application in optical fiber sensor devices; most importantly, an optical fiber-based interrogation setup can easily be adapted to investigate in situ desorption via a thermally stimulated process. In addition, it is possible to draw inferences about film stability in solution in a fast, reliable way when compared with the traditional ones.

Distributed MIMO Experiment Using LiFi Over Plastic Optical Fiber

2020 ◽  
Author(s):  
Sepideh Mohammadi Kouhini ◽  
Sreelal Maravanchery Mana ◽  
Ronald Freund ◽  
Volker Jungnickel ◽  
Carina Ribeiro Barbio Correa ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Plastic Optical Fiber

scholarly journals An Enhanced Plastic Optical Fiber-Based Surface Plasmon Resonance Sensor with a Double-Sided Polished Structure

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1516
Author(s):  
Lian Liu ◽  
Shijie Deng ◽  
Jie Zheng ◽  
Libo Yuan ◽  
Hongchang Deng ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Optical Fiber ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Low Cost ◽  
Fiber Axis ◽  
Plastic Optical Fiber ◽  
Au Film ◽  
Spr Sensor ◽  
Resonance Sensor

An enhanced plastic optical fiber (POF)-based surface plasmon resonance (SPR) sensor is proposed by employing a double-sided polished structure. The sensor is fabricated by polishing two sides of the POF symmetrically along with the fiber axis, and a layer of Au film is deposited on each side of the polished region. The SPR can be excited on both polished surfaces with Au film coating, and the number of light reflections will be increased by using this structure. The simulation and experimental results show that the proposed sensor has an enhanced SPR effect. The visibility and full width at half maximum (FWHM) of spectrum can be improved for the high measured refractive index (RI). A sensitivity of 4284.8 nm/RIU is obtained for the double-sided POF-based SPR sensor when the measured liquid RI is 1.42. The proposed SPR sensor is easy fabrication and low cost, which can provide a larger measurement range and action area to the measured samples, and it has potential application prospects in the oil industry and biochemical sensing fields.

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