کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5007163 | 1461608 | 2017 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Multimode interference-based fiber sensor in a cavity ring-down system for refractive index measurement
ترجمه فارسی عنوان
سنسور فیبر مبتنی بر تداخل چندتایی در یک سیستم کاهش دهنده حفره برای اندازه گیری شاخص شکست
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کلمات کلیدی
حفره حلقه، ضریب شکست، تداخل چندتایی، سنسورهای فیبر نوری،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی برق و الکترونیک
چکیده انگلیسی
This work reports a multimode interference-based fiber sensor in a cavity ring-down system (CRD) for sensing temperature-induced refractive index (RI) changes of water. The sensing head is based in multimodal interference (MMI) and it is placed inside the fiber loop cavity of the CRD system. A modulated laser source was used to send pulses down into the fiber loop cavity and an erbium-doped fiber amplifier (EDFA) was placed in the fiber ring to provide an observable signal with a reasonable decay time. The behavior of the sensing head to temperature was studied due to its intrinsic sensitivity to said parameter - a sensitivity of â1.6Ã10â9 μs/°C was attained. This allowed eliminating the temperature component from RI measurement of water and a linear sensitivity of 580 μs/RIU in the RI range of 1.324-1.331 was obtained. The use of a MMI fiber sensor in the proposed CRD configuration allowed achieving a sensitivity â¼4-fold than that obtained with a tilted fiber Bragg grating and â¼2-fold than that when a micrometric channel inscribed in the fiber was used.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics & Laser Technology - Volume 91, 1 June 2017, Pages 112-115
Journal: Optics & Laser Technology - Volume 91, 1 June 2017, Pages 112-115
نویسندگان
Susana Silva, Orlando Frazão,