Cladding mode resonances of etch-eroded fiber Bragg grating for ambient refractive index sensing

2006 ◽  
Vol 88 (13) ◽  
pp. 133902 ◽  
Author(s):  
Na Chen ◽  
Binfeng Yun ◽  
Yiping Cui
Keyword(s):  
Refractive Index ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Refractive Index Sensing ◽  
Cladding Mode

scholarly journals Investigation of refractive index sensing based on Fano resonance in fiber Bragg grating ring resonators

2015 ◽  
Vol 23 (11) ◽  
pp. 14301 ◽  
Author(s):  
Carlo Edoardo Campanella ◽  
Francesco De Leonardis ◽  
Lorenzo Mastronardi ◽  
Pietro Malara ◽  
Gianluca Gagliardi ◽  
...  
Keyword(s):  
Refractive Index ◽  
Fiber Bragg Grating ◽  
Fano Resonance ◽  
Ring Resonators ◽  
Bragg Grating ◽  
Refractive Index Sensing

scholarly journals New Parameters Extracted from Tilted Fiber Bragg Grating Spectra for the Determination of the Refractive Index and Cut-Off Wavelength

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 1964
Author(s):  
Sławomir Cięszczyk ◽  
Piotr Kisała ◽  
Janusz Mroczka
Keyword(s):  
Refractive Index ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Absolute Deviation ◽  
Measurement Resolution ◽  
Local Mean ◽  
Cladding Mode ◽  
Index Value ◽  
Local Average

Tilted fiber Bragg grating (TFBG) is a very popular fiber optic element that is used as a sensor for various physical quantities. The calculation of the refractive index of a substance surrounding the TFBG is based on its spectrum demodulation, which consists of determining a certain parameter that is correlated with the sought quantity. The most commonly used parameter is the area created by the maxima and minima of the cladding mode resonances. In this article, we propose a new group of methods, which are based on calculating the parameters related to the spectrum differences between the local average values in the range of occurrence of the cladding modes. The basic parameter used in this group of methods is the mean absolute deviation from the local mean, which is characterized by the best linearity among the considered group of methods. The calculated parameters, in their cumulative form, can also be used to determine the cut-off wavelength, which can also indirectly indicate the refractive index value. The proposed approaches were compared, in terms of measurement resolution, to the most commonly used methods, such as the cladding modes’ envelope area and the spectral contour lengths.

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