Smartphone-Based Interrogation of a Chirped FBG Strain Sensor Inscribed in a Multimode Fiber

被引：23

作者：

Markvart, Aleksandr A. ^{[1
]}

Liokumovich, Leonid B. ^{[1
]}

Medvedev, Iurii O. ^{[2
]}

Ushakov, Nikolai A. ^{[1
]}

机构：

[1] Peter Great St Petersburg Polytech Univ, Inst Phys Nanotechnol & Telecommun, St Petersburg 195251, Russia

[2] Univ Coimbra, Inst Syst & Robot, Rua Silvio Lima Polo II, P-3030290 Coimbra, Portugal

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2021年 / 39卷 / 01期

关键词：

Fiber gratings; Cameras; Optical sensors; Biomedical optical imaging; Diffraction; Optical refraction; Chirped fiber bragg grating; cramer-rao bound; fiber bragg grating; modal noise; multimode optical fiber sensor; smartphone-based optical spectrometer; smartphone-based sensor; OPTICAL-FIBER; BRAGG GRATINGS; MODAL NOISE;

D O I：

10.1109/JLT.2020.3024713

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Smartphone-based interrogation of a fiber Bragg grating sensor is, to the best of our knowledge, reported for the first time. The smartphone flashlight LED was used as a light source and a transmissive diffraction grating projected the CFBG spectra on the smartphone camera. In order to efficiently couple light from the smartphone LED to the fiber with CFBG, multimode fiber was used for inscription. Interrogation setup consists of a smartphone and low-cost off-the-shelf available components. Measurement principle was illustrated through the fiber strain caused by applied longitudinal force. Attained measurement sensitivity and resolution were validated via comparison with commercial spectrometer and theoretical results based on Cramer-Rao approach. Also, to the best of our knowledge, the influence of modal noise on the smartphone-based fiber optic sensor interrogation system performance is considered for the first time.

引用

页码：282 / 289

页数：8

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