Demodulation of a fiber Fabry-Perot strain sensor using white light interferometry

1991 ◽  
Author(s):  
Gary Zuliani ◽  
W. D. Hogg ◽  
Kexing Liu ◽  
Raymond M. Measures
Keyword(s):  
White Light ◽  
Strain Sensor ◽  
White Light Interferometry ◽  
Fabry Perot

Novel Electrochemical-Emission Spectroscopy of Metals by White Light Interferometry

2021 ◽  
Vol 1026 ◽  
pp. 189-196
Author(s):  
Khaled Habib
Keyword(s):  
Sulfuric Acid ◽  
Aqueous Solutions ◽  
Current Density ◽  
White Light ◽  
Emission Spectroscopy ◽  
Rate Change ◽  
Fiber Optic Sensor ◽  
White Light Interferometry ◽  
Fabry Perot ◽  
The Difference

A white light, i.e., Fabry-Perot, interferometry was unprecedently applied to determine the rate change of the current density (J) of aluminum samples during the anodization processes of the samples in aqueous solutions. The current density(J) values were obtained by Fabry-Perot interferometry rather than the direct current (DC) or alternating current (AC), methods. Therefore, the abrupt rate change of the J was called electrochemical-emission spectroscopy. The anodization of the aluminum samples was conducted by an external DC source in 0.0,2,4,6,8,10% sulfuric acid (H2SO4) solutions at room temperature. In the meantime, the Fabry-Perot interferometry was used to determine the difference between the J of two subsequent values, dJ, as a function of the elapsed time of the DC experiment for the aluminum samples in 0.0,2,4,6,8,10% H2SO4 solutions. The Fabry-Perot interferometry was based on a fiber-optic sensor in order to make real time-white light interferometry possible at the aluminum surfaces in the sulfuric acid solutions. As a result, a new spectrometer was developed based on the combination of the Fabry-Perot, i.e., white light, interferometry and DC method for studying in situ the electrochemical behavior of metals in aqueous solutions.

Fabry-Perot fiber pressure sensor based on white light interferometry and intensity demodulation method

2009 ◽  
Author(s):  
Zhenwu Guo ◽  
Weixiang Li ◽  
Dapeng Zhang ◽  
Yong Pan ◽  
Qingbin Meng ◽  
...  
Keyword(s):  
White Light ◽  
Pressure Sensor ◽  
White Light Interferometry ◽  
Fabry Perot ◽  
Demodulation Method
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