Time-domain slicing optical frequency domain reflectometry

A time-domain slicing (TDS) optical frequency domain reflectometry is proposed for large strain sensing with better spatial resolution. Compared with the conventional frequency domain slicing (FDS) method, the TDS with a Burg spectrum estimation is capable of enhancing the similarity of a local spec...

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Bibliographic Details
Published inOptics letters Vol. 49; no. 10; p. 2541
Main Authors Bai, Qing, Shen, Zhen, Wu, Luxuan, Liang, Changshuo, Wang, Yu, Liu, Xin, Jin, Baoquan
Format Journal Article
LanguageEnglish
Published United States 15.05.2024
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Summary:A time-domain slicing (TDS) optical frequency domain reflectometry is proposed for large strain sensing with better spatial resolution. Compared with the conventional frequency domain slicing (FDS) method, the TDS with a Burg spectrum estimation is capable of enhancing the similarity of a local spectrum under large strain and mostly suppressing the fake peaks during the strain resolving. The experimental results demonstrated that it enables measurements of strain ranging from 600 to 4200 µε with a spatial resolution of 2.4 mm and a narrow optical frequency scanning range of only 10 nm. Moreover, the measurement accuracy is improved by six times by decreasing the root mean square error (RMSE) from 8.6611 to 1.3396 µε without any hardware modification.
ISSN:1539-4794
DOI:10.1364/OL.520850