Compensation of Scanning Speed Instability in a Wavelength-Swept Laser for Dynamic Fiber Optic Sensors

被引：0

作者：

Choi, Byeong Kwon ^{[1
,2
]}

Kim, Min Su ^{[1
]}

Cho, Sung Yoon ^{[1
]}

Ahn, Soyeon ^{[1
]}

Kim, Ji Su ^{[1
]}

Yoo, Jaehyun ^{[1
]}

Jeon, Min Yong ^{[1
,3
]}

机构：

[1] Chungnam Natl Univ, Dept Phys, Daejeon 34134, South Korea

[2] Siemens Elect Design Automat, Seongnam Si 13524, South Korea

[3] Chungnam Natl Univ, Inst Quantum Syst, Daejeon 34134, South Korea

来源：

IEEE SENSORS JOURNAL | 2025年 / 25卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

Sensors; Fiber gratings; Optical fiber sensors; Semiconductor optical amplifiers; Optical polarization; Adaptive optics; Bandwidth; Wavelength measurement; Velocity control; Sensor arrays; Dynamic fiber sensor; fiber Bragg grating (FBG) sensor; wavelength-swept laser (WSL); INTERROGATION; SYSTEM; FDML;

D O I：

10.1109/JSEN.2024.3506744

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：

The scanning speed stability of a wavelength-swept laser (WSL) with a polygon-scanner-based wavelength filter (PSWF) is affected by the speed of the brushless direct current (BLDC) motor driving a polygonal scanner mirror (PSM). In particular, the PSM running at low speeds experiences fluctuations in rotational speed, causing the output of the WSL to fluctuate in the temporal domain. The speed variation of the WSL causes critical measurement errors in the fiber Bragg grating (FBG) interrogator sensors. In this study, we successfully corrected the output error of the FBG array sensor caused by the PSM rotational speed fluctuations in a WSL running at a low scanning rate. The FBG array used five FBGs, and the time intervals of the FBGs were corrected according to the PSM rotation speed variation based on the periodic interval of the array signal. A WSL with a scanning rate of 1.0 kHz suggested a 97% improvement after compensating for rotational speed variations of the PSM.

引用

页码：2784 / 2790

页数：7

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