Article
Engineering, Electrical & Electronic
Yin Zhou, Lianshan Yan, Haijun He, Zonglei Li, Heng Qian, Xinpu Zhang, Bin Luo, Wei Pan
Summary: The proposed DWI-BOTDA integrated sensing system combines DWI for fast dynamic strain measurement and BOTDA for accurate localization of dynamic events with high spatial resolution. Experimental results show significant improvements in dynamic strain measurement range and sensing stability in the system, enabling measurement of long-distance mechanical vibrations.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Review
Chemistry, Analytical
Cheng Feng, Thomas Schneider
Summary: Being one of the most established distributed fiber sensors, BOTDA has limitations due to the intrinsic gain spectrum, but this paper reviews a novel method of engineering the gain spectral properties to potentially enhance the performance. This spectrum property engineering not only improves BOTDA but also has the potential to enhance various types of distributed Brillouin fiber sensors.
Article
Chemistry, Analytical
Marcelo A. Soto, Alin Jderu, Dorel Dorobantu, Marius Enachescu, Dominik Ziegler
Summary: A high-order polynomial fitting method is proposed to accelerate the computation of double-Gaussian fitting in the retrieval of Brillouin frequency shifts (BFS) in optical fibers. Experimental validation shows that the method can provide reliable initial estimation of dual local BFS values, leading to a significant reduction in the number of iterations required and processing time.
Article
Engineering, Electrical & Electronic
Hua Zheng, Yaxi Yan, Zhiyong Zhao, Tao Zhu, Jingdong Zhang, Nan Guo, Chao Lu
Summary: This study proposes and experimentally demonstrates an accelerated fast BOTDA scheme through compressed sensing, utilizing the BM3D algorithm to enhance SNR and reduce averages, combined with PCA technique to successfully reconstruct the BGS from only 37.5% of frequency data. The experiment achieved distributed strain sensing over a 15 km single-mode fiber with 3 m spatial resolution and 0.52 MHz BFS uncertainty, with a measurement time of less than 0.5 s using 40 averages.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Qinglin Wang, Qing Bai, Yu Wang, Ning Cui, Jingsheng Li, Xuan Zheng, Baoquan Jin
Summary: In this paper, a fast peak searching method for Brillouin gain spectrum is proposed, which adaptively terminates the frequency scanning using the positive-slope inflection point. This method effectively reduces the measurement time while maintaining measurement accuracy.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Weilun Wei, Li Shen, Zhiyong Zhao, Can Zhao, Weijun Tong, Ming Tang
Summary: This work proposes and demonstrates performance enhanced BOTDA sensors that allow for simultaneous optimization of sensing range and spatial resolution by using differential Golay coding and deconvolution algorithm. Pulse coding is used to extend the sensing distance, while deconvolution processing is utilized to enhance the spatial resolution. The proposed technique manages to alleviate the contradiction between sensing range and spatial resolution of BOTDA sensors, paving the way for both long sensing range and high spatial resolution simultaneously.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
V. Fuertes, N. Gregoire, P. Labranche, S. Gagnon, S. LaRochelle, Y. Messaddeq
Summary: Rayleigh scattering enhanced nanoparticle-doped optical fibers, although restricted in composition and experimental conditions, show potential for distributed sensing applications. In this study, YPO4 nanocrystals are used to develop tunable optical fibers with enhanced scattering and optical performance. The fiber drawing process plays a crucial role in determining the nanocrystal features, and fibers drawn below 1950°C exhibit homogeneous characteristics and performance. The fabricated fibers demonstrate tunable backscattering and optical losses, enabling sensing lengths from 0.3 m to over 58 m. This work suggests a promising future for YPO4 nanocrystals in distributed sensing and opens the door to the incorporation of other REPO4 nanocrystals.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Electrical & Electronic
Kwang Yong Song, Jae Hyeong Youn
Summary: Optical fiber sensors based on Brillouin scattering have been developed over three decades ago, and various types of distributed sensing schemes have been introduced. The Brillouin optical correlation domain analysis (BOCDA), first proposed in 2000, is a quasi-distributed Brillouin sensor that allows arbitrary access to sensing positions through the frequency modulation of a continuous-wave light source. Compared to time-domain distributed sensors, BOCDA is more suitable for high spatial resolution or high sampling rate measurements over short sensing distances. This paper provides technical reviews on recent technologies to enhance the sensing accuracy of BOCDA systems, including differential measurement, injection-locking, and orthogonally polarized probe sidebands.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Ezra Ip, Fabien Ravet, Hugo Martins, Ming-Fang Huang, Tatsuya Okamoto, Shaobo Han, Chaitnaya Narisetty, Jian Fang, Yue-Kai Huang, Milad Salemi, Etienne Rochat, Fabien Briffod, Alexandre Goy, Maria del Rosario Fernandez-Ruiz, Miguel Gonzalez Herraez
Summary: This article reviews recent advances in distributed fiber optic sensing (DFOS) and its applications. DFOS utilizes the scattering mechanisms in glass to measure strain and/or temperature, enabling the monitoring of the ambient environment. By leveraging technologies developed for telecommunications, DFOS has achieved improved performance in terms of measurement resolution, reach, spatial resolution, and bandwidth. The article discusses the theory and architecture of commonly used DFOS methods and provides examples of their applications in various fields such as geohazard monitoring, seismic monitoring, traffic monitoring, and infrastructure health monitoring.
PROCEEDINGS OF THE IEEE
(2022)
Article
Engineering, Electrical & Electronic
Diego Samaniego, Gustavo Zoireff, Borja Vidal
Summary: A nonlinear method utilizing the polarization dependence of stimulated Brillouin scattering in optical fibers to generate and control both the type and magnitude of birefringence, as well as differential group delay (DGD), has been studied. Experiments demonstrate that both birefringence parameters can be dynamically changed with only a slight variation of the SBS-induced gain. Controlled DGD and DGD dispersion (DGDD) generation is also shown, with proof-of-concept experiments illustrating the feasibility of dynamically inducing linear, circular, and elliptical birefringence, as well as DGD and DGDD.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Shang Liu, Guijiang Yang, Zuying Xu, Liang Wang, Ming Tang, Deming Liu
Summary: An edge detection assisted BOTDA method is proposed for ultrafast sensing of abnormal temperature events, which can avoid large damage to the monitored structures.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Henan Wang, Dexin Ba, Xuejie Mu, Dengwang Zhou, Yongkang Dong
Summary: This paper introduces the concept, principle, and sensing scheme of the optical chirp chain (OCC) based Brillouin optical fiber sensor, explores three types of spectral distortions associated with rapid frequency sweeping, and reviews cutting-edge schemes and technologies to enhance Brillouin sensors with ultra-fast and high-performance sensing capabilities.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Zonglei Li, Yin Zhou, Zexi Hua, Lianshan Yan
Summary: Phase-based measurement can perfectly avoid the problem of relative intensity noise transfer by showing that RIN only affects the amplitude of the Brillouin probe and not its phase. This phase-based measurement reduces the measurement uncertainty by about 5 times, through a 2.5 times reduction in uncertainty compared to gain-based measurement and an additional 2 times reduction through the designed phase-noise-insensitive coherent detection scheme.
IEEE SENSORS JOURNAL
(2023)
Article
Physics, Multidisciplinary
J. Bonetti, D. F. Grosz, S. M. Hernandez
Summary: A new equation addressing the effect of quantum noise in optical fibers with arbitrary frequency-dependent nonlinear profiles is introduced in this study. By deriving a novel stochastic photon-conserving nonlinear Schrodinger equation suitable for modeling arbitrary nonlinear profiles, the study greatly enhances the understanding of fiber-based quantum devices and addresses issues of unphysical results.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Analytical
Christos Karapanagiotis, Aleksander Wosniok, Konstantin Hicke, Katerina Krebber
Summary: This study presents the first report on a machine-learning-assisted Brillouin optical frequency domain analysis (BOFDA) for time-efficient temperature measurements. A convolutional neural network (CNN)-based signal post-processing method is proposed to enhance temperature extraction and system performance, shortening measurement time by more than nine times.
