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مقالۀ پژوهشی: کاربرد پراکندگی برانگیخته بریلوئین در حسگرهای توزیعی دما با استفاده از فیبرهای نوری تک مد | ||
فیزیک کاربردی ایران | ||
مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 13 بهمن 1403 اصل مقاله (3.67 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22051/ijap.2025.48617.1429 | ||
نویسنده | ||
محمدرضا رضازاده شیرازی* | ||
استادیار، بخش فیزیک، دانشکده علوم، دانشگاه آزاد اسلامی واحد کرمان، کرمان، ایران | ||
چکیده | ||
در این پژوهش، یکی از کاربردهای پراکندگی برانگیخته بریلوئین در رابطه با حسگرهای توزیعی دما که فیبرهای نوری تک مد مرسوم را به کار میبرند بررسی میشود. هدف یافتن رابطهای بین جابهجاییهای بسامدی بریلوئین و دما تا حدود 1500 درجه سانتیگراد در این حسگرهای توزیعی دما است. در ابتدا تقریب خطی سرعت موج آکوستیک و یک چندجملهای گزارششده نمارشکست برحسب دما برای محاسبه جابهجایی بسامدی بریلوئین به کار میروند. مقایسه جابهجایی بسامدی بریلوئین بدست آمده با دو دسته مستقل دادههای آزمایشگاهی کنونی نشان میدهد که رابطه خطی مورد نظر بین سرعت موج آکوستیک و دما به خصوص در دماهای زیاد معتبر نمیباشد. سپس از راه برازش منحنی دادههای آزمایشگاهی گزارششده دیگری، چند جملهایهایی با مراتب مختلف تا درجه شش برای سرعت موج آکوستیک برحسب دما پیشنهاد میشود. نتایج نشان میدهند که چند جملهایهای پیشنهادی مرتبه دوم و سوم سرعت موج آکوستیک را میتوان در محاسبه جابهجاییهای بسامدی بریلوئین به کار برد، به صورتی که آنها حتی در دماهای زیاد به دادههای آزمایشگاهی بسیار نزدیکتر باشند. | ||
کلیدواژهها | ||
پراکندگی برانگیخته بریلوئین؛ حسگر؛ فیبر نوری؛ دما؛ کرنش | ||
عنوان مقاله [English] | ||
Research Paper: Application of Stimulated Brillouin Scattering in Distributed-Temperature Sensors Using Single-Mode Optical Fibers | ||
نویسندگان [English] | ||
Mohammadreza Rezazadeh Shirazi | ||
Assistant Professor, Physics Department, Faculty of Science, Kerman Branch, Islamic Azad University, Kerman, Iran | ||
چکیده [English] | ||
This research investigates one of the stimulated Brillouin scattering applications related to distributed-temperature sensors that utilize common single-mode optical fibers. The aim is to find a relation between the Brillouin frequency shift (BFS) and temperature up to 15000C in these distributed-temperature sensors. At first, a linear approximation of the acoustic wave velocity and a reported polynomial of the refractive index with temperature are employed to calculate BFS. A comparison of the obtained BFS with two independent sets of recent experimental data shows that the linear relation between acoustic wave velocity and temperature, which is generally considered valid, is not valid, especially at high temperatures. Then, using a curve-fitting method based on another reported experimental data set, different-order polynomials of degrees up to six are considered for the acoustic wave velocity with temperature. The results show that the proposed second and third-order polynomials of the acoustic wave velocity can be used to calculate BFSs that align more closely with experimental data, even at elevated temperatures. | ||
کلیدواژهها [English] | ||
Stimulated Brillouin Scattering, Sensor, Optical Fiber, Temperature, Strain | ||
سایر فایل های مرتبط با مقاله
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مراجع | ||
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