2 June 2014 Vibration sensor based on highly birefringent Bragg gratings written in standard optical fiber by a femtosecond laser
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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 9157AR (2014) https://doi.org/10.1117/12.2059932
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain
Abstract
We present a vibration sensor based on highly birefringent fiber Bragg gratings written in standard single mode optical fiber and realized with UV femtosecond pulses. This vibration sensor takes advantage of the stress-induced phase shift between the two orthogonally polarized fiber eigenmodes which induces intensity distribution changes in the two fiber Bragg grating reflection modes. The gratings are inscribed with the femtosecond line by line technique and have a birefringence value of 6 10-4. We demonstrate that theses gratings are temperature birefringence insensitive and ideal for vibration measurements.
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Karima Chah, Karima Chah, Antonio Bueno, Antonio Bueno, Damien Kinet, Damien Kinet, Christophe Caucheteur, Christophe Caucheteur, Cédric Chluda, Cédric Chluda, Patrice Mégret, Patrice Mégret, Marc Wuilpart, Marc Wuilpart, } "Vibration sensor based on highly birefringent Bragg gratings written in standard optical fiber by a femtosecond laser", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 9157AR (2 June 2014); doi: 10.1117/12.2059932; https://doi.org/10.1117/12.2059932
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