کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
747044 894494 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simultaneous strain and temperature sensor based on the numerical reconstruction of polarization maintaining fiber Bragg gratings
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Simultaneous strain and temperature sensor based on the numerical reconstruction of polarization maintaining fiber Bragg gratings
چکیده انگلیسی

When a short-length fiber Bragg grating is inscribed into a polarization-maintaining fiber, the resonant peaks produced by birefringence can overlap. In this case, the discrimination between strain and temperature effects is only possible by means of polarization control devices, i.e. a linear polarizer and a polarization controller. To avoid this complexity and the measurement errors that it involves, we propose a novel demodulation technique based on the numerical reconstruction of the grating physical parameters. Our technique evaluates the grating parameters from the amplitude spectrum by means of the coupled-mode equations. The convergence tool used to search the solutions is the Nelder–Mead simplex algorithm. The method is tested on uniform and apodized Bragg gratings and a very good accuracy is reported. The method is finally applied to a 2 mm-long uniform polarization-maintaining grating in order to simultaneously measure longitudinal strain and temperature.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics and Lasers in Engineering - Volume 44, Issue 5, May 2006, Pages 411–422
نویسندگان
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