Straightforward spectral signal processing in interferometric sensors based on birefringent polarization-maintaining optical fibers

1994 ◽  
Author(s):  
Sergey A. Egorov ◽  
Anatoly N. Mamaev ◽  
Alexander S. Polyantsev
Keyword(s):  
Signal Processing ◽  
Optical Fibers ◽  
Interferometric Sensors ◽  
Spectral Signal ◽  
Polarization Maintaining

Signal Processing Enhanced Fiber Vibration Sensors

2013 ◽  
Vol 543 ◽  
pp. 302-305
Author(s):  
Daniele Tosi ◽  
Massimo Olivero ◽  
Alberto Vallan ◽  
Guido Perrone
Keyword(s):  
Signal Processing ◽  
Optical Fibers ◽  
Adaptive Filters ◽  
Spectral Estimation ◽  
Cost Effective ◽  
Fiber Sensors ◽  
High Frequencies ◽  
Vibration Sensors ◽  
Signal Processing Algorithms ◽  
Plastic Optical Fibers

The paper analyzes the feasibility of cost-effective fiber sensors for the measurement of small vibrations, from low to medium-high frequencies, in which the complexity of the measurement is moved from expensive optics to cheap electronics without losing too much performance thanks to signal processing algorithms. Two optical approaches are considered: Bragg gratings in standard telecom fibers, which represent the most common type of commercial fiber sensors, and specifically developed sensors made with plastic optical fibers. In both cases, to keep the overall cost low, vibrations are converted into variations of the light intensity, although this makes the received signal more sensitive to noise. Then, adaptive filters and advanced spectral estimation techniques are used to mitigate noise and improve the sensitivity. Preliminary results have demonstrated that the combined effect of these techniques can yield to a signal-to-noise improvement of about 30 dB, bringing the proposed approaches to the level of the most performing sensors for the measurement of vibrations.

scholarly journals Stress Analysis of Polarization Maintaining Optical Fibers by the Finite Element Method

1970 ◽  
Vol 1 (1) ◽  
Author(s):  
M. H. Aly A. S. Farahat, M. S. Helmi and M. Farhoud
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Optical Fibers ◽  
Radial Distance ◽  
Single Mode ◽  
The Finite Element Method ◽  
Modal Birefringence ◽  
Polarization Maintaining ◽  
External Forces ◽  
Element Method

Stress-induced birefringence in single mode polarization maintaining optical fibers has been investigated using the finite element method. The modal birefringence caused by external forces in the Panda and the Side Tunnel fibers are calculated. It is found that the modal birefringence is directly proportional to the radial distance from the fiber center. As expected, the modal birefringence vanishes with the variation in the magnitude of the applied external loads.Key Words: Birefringence, Polarization, Panda Fiber, Side-Pit Fiber, Finite Element Method.

Spectral signal processing for tiny optical pieces

2010 ◽  
Author(s):  
Aurelian Ovidius I. Trufasu ◽  
Georgeta Sorohan ◽  
Danut Ursu ◽  
Cristina Liliana Trufasu
Keyword(s):  
Signal Processing ◽  
Spectral Signal

Pulsed X-ray and /spl gamma/ rays irradiation effects on polarization-maintaining optical fibers

2004 ◽  
Vol 51 (5) ◽  
pp. 2740-2746 ◽  
Author(s):  
S. Girard ◽  
J. Keurinck ◽  
Y. Ouerdane ◽  
J.-P. Meunier ◽  
A. Boukenter ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Gamma Rays ◽  
Irradiation Effects ◽  
X Ray ◽  
Polarization Maintaining
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