In line Fabry-Perot cavities manufactured by electric arc fusion of NIR-laser micro-drilled optical fiber flat tips

2019 ◽  
Author(s):  
Marta Nespereira ◽  
João M. Pinto Coelho ◽  
José Rebordão
Keyword(s):  
Optical Fiber ◽  
Electric Arc ◽  
Fabry Perot ◽  
Nir Laser

scholarly journals A Refractive Index Sensor Based on a Fabry–Perot Interferometer Manufactured by NIR Laser Microdrilling and Electric Arc Fusion

Photonics ◽  
2019 ◽  
Vol 6 (4) ◽  
pp. 109
Author(s):  
Nespereira ◽  
Coelho ◽  
Rebordão
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Single Mode ◽  
Electric Arc ◽  
Refractive Index Sensor ◽  
Formation Processes ◽  
Fringe Visibility ◽  
Fabry Perot ◽  
A New Technique ◽  
Nir Laser

In-line Fabry–Perot cavities manufactured by a new technique using electric arc fusion of NIR laser microdrilled optical fiber flat tips were studied herein for refractive index sensing. Sensors were produced by creating an initial hole on the tip of a standard single-mode telecommunication optical fiber using a Q-switched Nd:YAG laser. Laser ablation and plasma formation processes created 5 to 10 micron cavities. Then, a standard splicing machine was used to fuse the microdrilled fiber with another one, thus creating cavities with lengths around 100 micrometers. This length has been proven to be necessary to obtain an interferometric signal with good fringe visibility when illuminating it in the C-band. Then, the sensing tip of the fiber, with the resulting air cavity, was submitted to several cleaves to enhance the signal and, therefore, its response as a sensor, with final lengths between tens of centimeters for the longest and hundreds of microns for the shortest. The experimental results were analyzed via two signal analysis techniques, fringe visibility and fast Fourier transform, for comparison purposes. In absolute values, the obtained sensitivities varied between 0.31 nm−1/RIU and about 8 nm−1/RIU using the latter method and between about 34 dB/RIU and 54 dB/RIU when analyzing the fringe visibility.

scholarly journals Highly-Efficient Sulfonated UiO-66(Zr) Optical Fiber for Rapid Detection of Trace Levels of Pb2+

2021 ◽  
Vol 22 (11) ◽  
pp. 6053
Author(s):  
Marziyeh Nazari ◽  
Abbas Amini ◽  
Nathan T. Eden ◽  
Mikel C. Duke ◽  
Chun Cheng ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Rapid Detection ◽  
Chemical Sensor ◽  
Metal Organic Framework ◽  
Aqueous System ◽  
Icp Oes ◽  
Efficient Detection ◽  
Low Concentrations ◽  
Fabry Perot ◽  
Metal Organic

Lead detection for biological environments, aqueous resources, and medicinal compounds, rely mainly on either utilizing bulky lab equipment such as ICP-OES or ready-made sensors, which are based on colorimetry with some limitations including selectivity and low interference. Remote, rapid and efficient detection of heavy metals in aqueous solutions at ppm and sub-ppm levels have faced significant challenges that requires novel compounds with such ability. Here, a UiO-66(Zr) metal-organic framework (MOF) functionalized with SO3H group (SO3H-UiO-66(Zr)) is deposited on the end-face of an optical fiber to detect lead cations (Pb2+) in water at 25.2, 43.5 and 64.0 ppm levels. The SO3H-UiO-66(Zr) system provides a Fabry–Perot sensor by which the lead ions are detected rapidly (milliseconds) at 25.2 ppm aqueous solution reflecting in the wavelength shifts in interference spectrum. The proposed removal mechanism is based on the adsorption of [Pb(OH2)6]2+ in water on SO3H-UiO-66(Zr) due to a strong affinity between functionalized MOF and lead. This is the first work that advances a multi-purpose optical fiber-coated functional MOF as an on-site remote chemical sensor for rapid detection of lead cations at extremely low concentrations in an aqueous system.

Dual-parameter optical fiber probe based on a three-beam Fabry-Perot interferometer

2020 ◽  
pp. 1-1
Author(s):  
Wen Zhang ◽  
Haoye Li ◽  
Lianqing Zhu ◽  
Mingli Dong ◽  
Fanyong Meng
Keyword(s):  
Optical Fiber ◽  
Fiber Probe ◽  
Optical Fiber Probe ◽  
Fabry Perot

Range Tunable Optical Fiber Micro-Fabry–Pérot Interferometer for Pressure Sensing

2016 ◽  
Vol 28 (4) ◽  
pp. 402-405 ◽  
Author(s):  
Honglin Liu ◽  
D. N. Wang ◽  
Jibing Liu ◽  
Shen Liu
Keyword(s):  
Optical Fiber ◽  
Pressure Sensing ◽  
Fabry Perot
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