scholarly journals Fiber optic hydrogen sensor based on an Fabry-Perot interferometer with fiber Bragg grating and nano film

Lab on a Chip ◽  
2021 ◽  
Author(s):  
Junxian Luo ◽  
Shen Liu ◽  
Peijing Chen ◽  
Shengzhen Lu ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Hydrogen Concentration ◽  
Industrial Production ◽  
Fiber Optic ◽  
Clinical Medicine ◽  
Hydrogen Sensor ◽  
Bragg Grating ◽  
Fabry Perot

Hydrogen is widely used in industrial production, clinical medicine, and as fuel. Hydrogen becomes explosive when the hydrogen-air mixture ranges from 4 to 76 vol%; thus, a rapid hydrogen concentration...

scholarly journals Fiber Optic Fabry-Perot Current Sensor Integrated with Magnetic Fluid Using a Fiber Bragg Grating Demodulation

Sensors ◽  
2015 ◽  
Vol 15 (7) ◽  
pp. 16632-16641 ◽  
Author(s):  
Ji Xia ◽  
Qi Wang ◽  
Xu Liu ◽  
Hong Luo
Keyword(s):  
Fiber Bragg Grating ◽  
Magnetic Fluid ◽  
Fiber Optic ◽  
Current Sensor ◽  
Bragg Grating ◽  
Fabry Perot

Fiber optic acoustic sensor based on Fiber Bragg grating Fabry-Perot(FBG-FP)cavity

2021 ◽  
Author(s):  
Pengfei Zhang ◽  
Ziyang Xiang ◽  
Fangjun Wang ◽  
Yaqi Tang ◽  
Chao Wang ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Fiber Optic ◽  
Bragg Grating ◽  
Acoustic Sensor ◽  
Fabry Perot

Fiber Bragg Grating Hydrogen Sensor Based on Magnetron Sputtering

2015 ◽  
Vol 738-739 ◽  
pp. 3-6
Author(s):  
Hong Bin Wang ◽  
Ying Ting Luo ◽  
Feng Li ◽  
Hong Tu Song ◽  
Zhen Wu ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
Fiber Bragg Grating ◽  
Hydrogen Concentration ◽  
High Sensitivity ◽  
Hydrogen Sensor ◽  
Bragg Grating ◽  
High Quality

This paper presents the development and fabrication of fiber Bragg grating hydrogen sensor by using magnetron sputtering method to overcome the problem of hydrogen embrittlement.With compact, smooth and high quality thin films deposited by magnetron sputtering, two layers have been sputtered around the fiber cladding: titanium (Ti) layer (20nm) and palladium (Pd) layer (500nm). Between the two layers, Ti is acted as adhesive coatings to ensure connection between fiber and Pd film. Finally, the performance of the developed FBG hydrogen sensor was tested in the laboratory under low hydrogen concentration. The results prove that the fabricated hydrogen sensor has a high sensitivity of 22.67pm/%H2.

Modeling of Fiber Bragg Grating Hydrogen Sensor with Multiple Membranes

2015 ◽  
Vol 738-739 ◽  
pp. 15-18
Author(s):  
Ying Ting Luo ◽  
Hao Wu ◽  
Yong Huang ◽  
Xiong Li ◽  
Hong Tu Song ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Partial Pressure ◽  
Fiber Bragg Grating ◽  
Hydrogen Concentration ◽  
Linear Response ◽  
Hydrogen Sensor ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Low Concentration ◽  
The Relationship

This paper develops a multiple membranes fiber Bragg grating (FBG) hydrogen sensor and investigates the relationship between wavelength of FBG hydrogen sensor and ambient hydrogen concentration. A physical and mathematical model is built to explain the sensor behavior when it is subjected to the changes in hydrogen concentration and in temperature. The shifts in Bragg wavelengths of the Pd-coated FBG hydrogen sensor as a function of hydrogen partial pressure is obtained. Thus the developed FBG hydrogen sensor has a linear response to hydrogen in the low concentration range. Tests were carried on to prove the relationship between wavelength shift and hydrogen concentration.

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