Results 71 to 80 of about 1,583 (160)

Brillouin lasing in single-mode tapered optical fiber with inscribed fiber Bragg grating array

Results in Physics, 2018
A tapered optical fiber has been manufactured with an array of fiber Bragg gratings (FBG) inscribed during the drawing process. The total fiber peak reflectivity is 5% and the reflection bandwidth is ∼3.5 nm. A coherent frequency domain reflectometry has
S.M. Popov, O.V. Butov, Y.K. Chamorovskiy, V.A. Isaev, A.O. Kolosovskiy, V.V. Voloshin, I.L. Vorob'ev, M.Yu. Vyatkin, P. Mégret, M. Odnoblyudov, D.A. Korobko, I.O. Zolotovskii, A.A. Fotiadi   +12 more
doaj   +1 more source

Long-Range OFDR-Based Distributed Vibration Optical Fiber Sensor by Multicharacteristics of Rayleigh Scattering

IEEE Photonics Journal, 2017
We present a long-range optical frequency domain reflectometry (OFDR) based distributed vibration optical fiber sensor (DVOFS) by multicharacteristics of Rayleigh scattering.
Zhenyang Ding, Di Yang, Kun Liu, Junfeng Jiang, Yang Du, Bingkun Li, Minghao Shang, Tiegen Liu   +7 more
doaj   +1 more source

A Novel Method for the Processing of Optical Frequency Domain Reflectometry Traces

Optics
Optical frequency domain reflectometry (OFDR) is one of the key diagnostic tools for fiber optic components and circuits built on them. A low signal-to-noise ratio, resulting from the low intensity of backscattered signals, prevents the correct ...
Anton Krivosheev, Dmitriy Kambur, Artem Turov, Max Belokrylov, Yuri Konstantinov, Timur Agliullin, Konstantin Lipatnikov, Fedor Barkov   +7 more
doaj   +1 more source

Remote phase-sensitive optical frequency domain reflectometry

Optics Express
We propose a common-path, self-referenced phase-sensitive optical frequency domain reflectometry (φ-OFDR) system capable of creating a remote sensing window at the far end of an ultra-long fiber. By utilizing the reflection from the fiber's far end as the local oscillator, the system inherently compensates for laser phase noise accumulated over the ...
Hongwei Li, Jiayan Wang, Zhang Xiong, Yanda Qu, TianFu Li, Shuaiqi Liu, Yongkang Dong   +6 more
openaire   +1 more source

Accurate estimation of modulation amplitude in Brillouin optical correlation-domain reflectometry based on Rayleigh noise spectrum

Scientific Reports
In Brillouin optical correlation-domain reflectometry (BOCDR), spatial resolution relies on the modulation amplitude of the light. We propose a Rayleigh-based method that utilizes the spectral width of Rayleigh-induced noise to measure this amplitude ...
Keita Kikuchi, Heeyoung Lee, Ryo Inoue, Kouta Ozaki, Haruki Sasage, Yosuke Mizuno   +5 more
doaj   +1 more source

Distributed measurements of vibration frequency using phase-OTDR with a DFB laser self-stabilized through PM fiber ring cavity

Results in Physics, 2019
We have evaluated the performance of a phase-sensitive optical time domain reflectometry (φ-OTDR) system for vibration measurements utilizing a conventional telecom DFB laser self-stabilized through an external PM optical fiber ring resonator.
J.L. Bueno Escobedo, J. Jason, C.A. López-Mercado, V.V. Spirin, M. Wuilpart, P. Mégret, D.A. Korobko, I.O. Zolotovskiy, A.A. Fotiadi   +8 more
doaj   +1 more source

Distributed Refractive Index Sensing Based on Etched Ge-Doped SMF in Optical Frequency Domain Reflectometry. [PDF]

Sensors (Basel), 2023
Fu C, Sui R, Peng Z, Meng Y, Zhong H, Li M, Yin X, Wang Y.   +7 more
europepmc   +1 more source

Young's Modulus-Independent Determination of Fibre Parameters for Rayleigh-Based Optical Frequency Domain Reflectometry from Cryogenic Temperatures up to 353 K. [PDF]

Sensors (Basel), 2023
Girmen C, Dittmar C, Siedenburg T, Gastens M, Wlochal M, König N, Schröder KU, Schael S, Schmitt RH.   +8 more
europepmc   +1 more source

Sensing Accuracy Enhancement of Phase-Sensitive Optical Frequency Domain Reflectometry Using Hybrid Hampel-Median Filter

IEEE Photonics Journal
We propose a novel filter scheme to enhance the sensing accuracy of phase-sensitive optical frequency domain reflectometer (Φ-OFDR) while maintaining high spatial resolution via cascading Hampel filter and median filter.
Yiheng Cheng, Qinlin Zeng, Fei Liu, Fei Cui, Zhi Wang, Dan Li, Benzhang Wang, Xian Zhou   +7 more
doaj   +1 more source

Structural Health Monitoring Using a New Type of Distributed Fiber Optic Smart Textiles in Combination with Optical Frequency Domain Reflectometry (OFDR): Taking a Pedestrian Bridge as Case Study. [PDF]

Sensors (Basel), 2023
Abedin S, Biondi AM, Wu R, Cao L, Wang X.   +4 more
europepmc   +1 more source