Fiber-optic refractive index sensor based on cladding-mode resonance

2009 ◽  
Author(s):  
Fufei Pang ◽  
Huanhuan Liu ◽  
Na Chen ◽  
Yunqi Liu ◽  
Xianglong Zeng ◽  
...  
Keyword(s):  
Refractive Index ◽  
Fiber Optic ◽  
Refractive Index Sensor ◽  
Cladding Mode

Core–cladding mode recoupling based fiber optic refractive index sensor

2013 ◽  
Vol 294 ◽  
pp. 188-191 ◽  
Author(s):  
Xinpu Zhang ◽  
Wei Peng ◽  
Yun Liu ◽  
Lujun Pan
Keyword(s):  
Refractive Index ◽  
Fiber Optic ◽  
Refractive Index Sensor ◽  
Cladding Mode

Fiber optic refractive index sensor based on tapered capillary

2021 ◽  
Author(s):  
Cheng Zhang ◽  
Jing Yang ◽  
Guanghuan Cui ◽  
Zheng Sun ◽  
Yafeng Zhao ◽  
...  
Keyword(s):  
Refractive Index ◽  
Fiber Optic ◽  
Refractive Index Sensor

Laser-Machined Miniature Fiber-Optic Refractive-Index Sensor Tip

2010 ◽  
Vol 39 (7) ◽  
pp. 1239-1242
Author(s):  
孙东 SUN Dong ◽  
冉曾令 RAN Zeng-ling ◽  
饶云江 RAO Yun-jiang
Keyword(s):  
Refractive Index ◽  
Fiber Optic ◽  
Refractive Index Sensor

scholarly journals Temperature-Insensitive Refractive Index Sensor with Etched Microstructure Fiber

Sensors ◽  
2019 ◽  
Vol 19 (17) ◽  
pp. 3749 ◽  
Author(s):  
Bin Dai ◽  
Xiang Shen ◽  
Xiongwei Hu ◽  
Luyun Yang ◽  
Haiqing Li ◽  
...  
Keyword(s):  
Refractive Index ◽  
Low Temperature ◽  
Extinction Ratio ◽  
Refractive Index Sensor ◽  
Large Mode Area ◽  
Pure Silica ◽  
Microstructure Fiber ◽  
Cladding Mode ◽  
Mode Area ◽  
Sensing Characteristics

A Mach–Zehnder interferometer (MZI) based on an etched all-solid microstructure fiber (MOF) has been demonstrated. The MZI works on the basis of interference between the vibrant core and cladding modes in the MOF. The all-solid MOF has a heterostructure cladding composed of Ge-doped rod arrays and pure silica, and thus can support and propagate a vibrant cladding mode with a large mode area. When the outermost cladding of MOF is etched, the cladding mode becomes sensitive to the ambient refractive index (RI). The etched MOF can work as a sensing head for RI sensing. By comparing the interference spectra, the extinction ratio has remained stable at around 20 dB after the MOF was etched. The RI sensing characteristics of the MZI with an etched MOF have also been investigated. The results show that the RI sensitivity can reach up to 2183.6 nm/RIU with a low-temperature coefficient (<10 pm/°C).

scholarly journals Single mode tapered fiber-optic interferometer based refractive index sensor and its application to protein sensing

2014 ◽  
Vol 22 (19) ◽  
pp. 22802 ◽  
Author(s):  
T. K Yadav ◽  
R. Narayanaswamy ◽  
M. H. Abu Bakar ◽  
Y. Mustapha Kamil ◽  
M. A. Mahdi
Keyword(s):  
Refractive Index ◽  
Fiber Optic ◽  
Single Mode ◽  
Refractive Index Sensor ◽  
Protein Sensing ◽  
Tapered Fiber ◽  
Fiber Optic Interferometer

scholarly journals Preparation and Characterization of Microsphere ZnO ALD Coating Dedicated for the Fiber-Optic Refractive Index Sensor

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 306 ◽  
Author(s):  
Paulina Listewnik ◽  
Marzena Hirsch ◽  
Przemysław Struk ◽  
Matthieu Weber ◽  
Mikhael Bechelany ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Fiber Optic ◽  
Single Mode ◽  
Atomic Layer ◽  
Fiber Optic Sensor ◽  
Refractive Index Sensor ◽  
Layer Deposition ◽  
Fabry Perot

We report the fabrication of a novel fiber-optic sensor device, based on the use of a microsphere conformally coated with a thin layer of zinc oxide (ZnO) by atomic layer deposition (ALD), and its use as a refractive index sensor. The microsphere was prepared on the tip of a single-mode optical fiber, on which a conformal ZnO thin film of 200 nm was deposited using an ALD process based on diethyl zinc (DEZ) and water at 100 °C. The modified fiber-optic microsphere was examined using scanning electron microscopy and Raman spectroscopy. Theoretical modeling has been carried out to assess the structure performance, and the performed experimental measurements carried out confirmed the enhanced sensing abilities when the microsphere was coated with a ZnO layer. The fabricated refractive index sensor was operating in a reflective mode of a Fabry–Pérot configuration, using a low coherent measurement system. The application of the ALD ZnO coating enabled for a better measurement of the refractive index of samples in the range of the refractive index allowed by the optical fiber. The proof-of-concept results presented in this work open prospects for the sensing community and will promote the use of fiber-optic sensing technologies.

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