Results 21 to 30 of about 1,583 (160)

Numerical Analysis and Recursive Compensation of Position Deviation for a Sub-Millimeter Resolution OFDR

Sensors, 2020
We analyze the source of the position deviation and propose a demodulation recursive compensation algorithm to ensure a sub-millimeter resolution in improved optical frequency domain reflectometry.
Yueying Cheng, Mingming Luo, Jianfei Liu, Nannan Luan   +3 more
doaj   +1 more source

A Phase-Sensitive Optical Time Domain Reflectometry with Non-Uniform Frequency Multiplexed NLFM Pulse

Sensors, 2023
In the domain of optical fiber distributed acoustic sensing, the persistent challenge of extending sensing distances while concurrently improving spatial resolution and frequency response range has been a complex endeavor.
Zhengyang Li, Yangan Zhang, Xueguang Yuan, Zhenyu Xiao, Yuan Zhang, Yongqing Huang   +5 more
doaj   +1 more source

Application of phosphate doped fibers for OFDR dosimetry

Results in Physics, 2016
We employ phosphate doped optical fibers for distributed dosimetry based on Optical Frequency Domain Reflectometry (OFDR) and demonstrate the effect of limited Integrated Insertion Loss Dynamic Range (ILDR) on the system performance.
A.V. Faustov, A.V. Gusarov, P. Mégret, M. Wuilpart, A.V. Zhukov, S.G. Novikov, V.V. Svetukhin, A.A. Fotiadi   +7 more
doaj   +1 more source

A Universal Phase Error Analysis for Optical Frequency Tuning Lasers Utilized in Fiber Sensing with OFDR

Photonics, 2022
As optical fiber sensing has attracted increasing attention due to its advantages such as high accuracy, low costs, and stability, its optical source judgment has become an attractive issue by which to characterize its performance.
Zheyi Yao, Zhewen Yuan, Guohua Gu, Qian Chen, Xiubao Sui   +4 more
doaj   +1 more source

High-Spatial-Resolution Dynamic Strain Measurement Based on Brillouin Optical Correlation-Domain Sensors

Photonics, 2023
Brillouin-scattering-based sensors have been widely applied in distributed temperature or strain measurement in recent 20 years. Brillouin optical correlation-domain technology has extensive development and application prospects because of its millimeter-
Yahui Wang, Jing Chen, Jinglian Ma, Lintao Niu, Mingjiang Zhang   +4 more
doaj   +1 more source

Two-dimensional distributed strain sensing with an Archimedean spiral arrangement in optical frequency domain reflectometry

Nanotechnology and Precision Engineering, 2018
We demonstrate a distributed two-dimensional (2D) strain-sensing system in optical frequency domain reflectometry (OFDR) with an Archimedean spiral arrangement of the sensing fiber.
Yamei Guo, Zhenyang Ding, Kun Liu, Junfeng Jiang, Chenhuan Wang, Tiegen Liu   +5 more
doaj   +1 more source

Improving the Spatial Resolution of an OFDR Based on Recirculating Frequency Shifter

IEEE Photonics Journal, 2015
We demonstrate a novel method for obtaining high spatial resolution optical frequency domain reflectometry (OFDR) utilizing recirculating frequency shifter for broadening the optical frequency sweeping.
Jiaxiong Li, Jiangbing Du, Shuai Wang, Lu Li, Lin Sun, Xinyu Fan, Qingwen Liu, Zuyuan He   +7 more
doaj   +1 more source

Frequency scanned phase sensitive optical time-domain reflectometry interrogation in multimode optical fibers

APL Photonics, 2020
Standard multimode optical fibers normally support transmission over some 100 modes. Large differences in the propagation constant and the spatial distribution of distinct modes degrade the performance of phase-sensitive optical time-domain reflectometry
K. Markiewicz, J. Kaczorowski, Z. Yang, L. Szostkiewicz, A. Dominguez-Lopez, K. Wilczynski, M. Napierala, T. Nasilowski, L. Thévenaz   +8 more
doaj   +1 more source

Refractometry through optical frequency-domain reflectometry

Electronics Letters, 1985
A refractometer for liquids, based on optical frequency-domain reflectometry, is described which uses a simple fibre probe with minimal contact area with the test liquid. The sensitivity is much better than in earlier reported fibre refractometers.
Tjhung, T.T., Teo, S.K., Mendis, F.V.C., Selvan, B.   +3 more
openaire   +1 more source

Performance of a solid-state frequency-shifted feedback laser in optical ranging [PDF]

Journal of the European Optical Society-Rapid Publications, 2009
The performance of a frequency-shifted feedback laser (FSFL) using a Nd:YVO4 crystal as gain medium was investigated as light source in high accuracy optical ranging based on optical-frequency domain reflectometry (OFDR).
Ndiaye Cheikh, Hara Takefumi, Ito Hiromasa   +2 more
doaj   +1 more source