Highly birefringent microstructured fibers with enhanced sensitivity to hydrostatic pressure
Abstract
We designed, manufactured and characterized two birefringent microstructured fibers that feature a 5-fold increase in polarimetric sensitivity to hydrostatic pressure compared to the earlier reported values for microstructured fibers. We demonstrate a good agreement between the finite element simulations and the experimental values for the polarimetric sensitivity to pressure and to temperature. The sensitivity to hydrostatic pressure has a negative sign and exceeds -43 rad/MPa x m at 1.55 microm for both fibers. In combination with the very low sensitivity to temperature, this makes our fibers the candidates of choice for the development of microstructured fiber based hydrostatic pressure measurement systems.
References
Sensitivity enhancement of fiber Bragg gratings to transverse stress by using microstructural fibers
Precision measurement of modal birefringence of highly birefringent fibers by periodic lateral force
Numerical analysis and experimental design of tunable birefringence in microstructured optical fiber
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