Results 31 to 40 of about 79,181 (180)

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

open access: yesPhotonics, 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   +4 more
doaj   +1 more source

Effective Brillouin Gain Spectra Broadening for SBS Suppression Based on Pseudo Random Bit Sequence Phase Modulation in Fiber System

open access: yesIEEE Photonics Journal, 2021
We describe stimulated Brillouin scattering process in a fiber system with light field phase modulated by lowpass filtered and amplified pseudo random bit sequence (PRBS) using localized nonfluctuating source model.
Binglin Li   +5 more
doaj   +1 more source

Observation of hypersonic phononic crystal effects in porous silicon superlattices [PDF]

open access: yes, 2009
Brillouin light scattering experiments were carried out on porous silicon superlattices with modulation wavelengths in the range 37–167 nm. Phonon frequencies deduced from the Brillouin spectra show good agreement with those obtained from an elastic ...
Aliev G., G. T. Andrews, L. C. Parsons
core   +1 more source

Hybrid Ytterbium/Brillouin Gain Assisted Partial Mode Locking in Yb-Doped Fiber Laser

open access: yesIEEE Photonics Journal, 2015
We have demonstrated experimentally and theoretically that the hybrid ytterbium/Brillouin gain can contribute to partial mode locking in the high-loss ytterbium-doped fiber laser.
Haibin Lu   +3 more
doaj   +1 more source

Brillouin scattering of phonons in complex materials

open access: yesAdvances in Physics: X, 2018
Initially, the theory of propagation of long-wavelength acoustic phonons and Brillouin scattering of laser light in condensed matter is concisely summarized. Then, the case of two relevant classes of complex materials in which Brillouin scattering can be
Carlo E. Bottani, Daniele Fioretto
doaj   +1 more source

Analysis and Reduction of Nonlinear Effects in Optical Fiber Frequency Transfer

open access: yesApplied Sciences, 2023
Nonlinear effects in optical fiber frequency transfer have a significant impact on the precision of frequency transfer. We investigate the main nonlinear effects, including the Brillouin scattering and the Raman scattering, in optical fiber frequency ...
Jing Gao   +10 more
doaj   +1 more source

Benefits of Spectral Property Engineering in Distributed Brillouin Fiber Sensing

open access: yesSensors, 2021
As one of the most consolidated distributed fiber sensors based on stimulated Brillouin scattering, the Brillouin optical time-domain analyzer (BOTDA) has been developed for decades.
Cheng Feng, Thomas Schneider
doaj   +1 more source

Time-domain Brillouin scattering assisted by diffraction gratings [PDF]

open access: yes, 2017
Absorption of ultrashort laser pulses in a metallic grating deposited on a transparent sample launches coherent compression/dilatation acoustic pulses in directions of different orders of acoustic diffraction. Their propagation is detected by the delayed
Chaban, Ievgeniia   +4 more
core   +3 more sources

Detrimental Effect Elimination of Laser Frequency Instability in Brillouin Optical Time Domain Reflectometer by Using Self-Heterodyne Detection

open access: yesSensors, 2017
A useful method for eliminating the detrimental effect of laser frequency instability on Brillouin signals by employing the self-heterodyne detection of Rayleigh and Brillouin scattering is presented.
Yongqian Li   +3 more
doaj   +1 more source

Brillouin Optical Correlation-Domain Technologies Based on Synthesis of Optical Coherence Function as Fiber Optic Nerve Systems for Structural Health Monitoring

open access: yesApplied Sciences, 2019
Brillouin optical correlation-domain technologies are reviewed as “fiber optic nerve systems” for the health monitoring of large structures such as buildings, bridges, and aircraft bodies.
Kazuo Hotate
doaj   +1 more source

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