Results 51 to 60 of about 25,400 (165)

Parallel imaging with phonon microscopy using a multi-core fibre bundle detection

Photoacoustics, 2023
In this paper, we show a proof-of-concept method to parallelise phonon microscopy measurements for cell elasticity imaging by demonstrating a 3-fold increase in acquisition speed which is limited by current acquisition hardware.
Rafael Fuentes-Domínguez, Mengting Yao, William Hardiman, Salvatore La Cavera III, Kerry Setchfield, Fernando Pérez-Cota, Richard J. Smith, Matt Clark   +7 more
doaj   +1 more source

Out-of-plane longitudinal sound velocity in SnS2 determined via broadband time-domain Brillouin scattering

Journal of Applied Physics, 2022
Here, we report time-resolved broadband transient reflectivity measurements performed in a single crystal of SnS2. We made use of time-domain Brillouin scattering and a broadband probe to measure the out-of-plane longitudinal sound velocity, υL=(2950±100)ms–1, in this semiconducting two-dimensional metal dichalcogenide.
Meixin Cheng, Kostyantyn Pichugin, André Maas, Marika Schleberger, Germán Sciaini   +4 more
openaire   +2 more sources

Applied Fiber Optic Measurement for Geohydraulic Engineering [PDF]

, 1997
Engineers have long sought the possibility of measuring parameters such as temperature and pressure continuously in the underground with high precision, high spatial resolution and high band width of parameters. Distributed fibre optic measurement offers
Nishigaki, Makoto, Schreck, Martin
core   +1 more source

Distributed opto-mechanical analysis of liquids outside standard fibers coated with polyimide

, 2019
The analysis of surrounding media has been a long-standing challenge of optical fiber sensors. Measurements are difficult due to the confinement of light to the inner core of standard fibers.
Bashan, Gil, Diamandi, Hilel Hagai, London, Yosef, Zadok, Avi   +3 more
core   +1 more source

Hybrid Fiber Optic Cable for Strain Profiling and Crack Growth Measurement in Rock, Cement, and Brittle Installation Media

Sensors, 2022
Brillouin scattering-based distributed fiber optic sensing (DFOS) technologies such as Brillouin optical time domain reflectometry (BOTDR) and Brillouin optical time domain analysis (BOTDA) have broad applicability for the long term and real-time ...
Samuel Nowak, Taghi Sherizadeh, Mina Esmaeelpour, Dogukan Guner, Kutay E. Karadeniz   +4 more
doaj   +1 more source

Integrated RF-photonic Filters via Photonic-Phononic Emit-Receive Operations

, 2017
The creation of high-performance narrowband filters is of great interest for many RF-signal processing applications. To this end, numerous schemes for electronic, MEMS-based, and microwave photonic filters have been demonstrated.
Kharel, Prashanta, Kittlaus, Eric A., Otterstrom, Nils T., Rakich, Peter T., Wang, Zheng   +4 more
core   +1 more source

Origin of the "Waterfall" Effect in Phonon Dispersion of Relaxor Perovskites [PDF]

, 2003
Inelastic neutron scattering study of the perovskite relaxor ferroelectric PZN:8%PT elucidates the origin of the previously reported unusual kink on the low frequency transverse phonon dispersion curve (known as "waterfall" effect).
Hlinka, J., Kamba, S., Kulda, J., Petzelt, J., Randall, C. A., Zhang, S. J.   +5 more
core   +2 more sources

Overcoming Nonlocal Effects and Brillouin Threshold Limitations in Brillouin Optical Time-Domain Sensors

IEEE Photonics Journal, 2015
We demonstrate, for the first time to our knowledge, a Brillouin optical time-domain analysis (BOTDA) sensor that is able to operate with a probe power larger than the Brillouin threshold of the deployed sensing fiber and that is free from detrimental ...
Ruben Ruiz-Lombera, Javier Urricelqui, Mikel Sagues, Jesus Mirapeix, Jose M. Lopez-Higuera, Alayn Loayssa   +5 more
doaj   +1 more source

High-Precision Measurement of Brillouin Frequency Shift in Brillouin Optical Time-Domain Reflectometer Based on Half-Peak Fitting Algorithm of Power Spectrum

IEEE Access, 2023
The Brillouin optical time-domain reflectometer (BOTDR) system, which is based on the Brillouin frequency shift (BFS) of the scattering spectrum, has been widely applied to monitor the temperature and strain in many fields.
Dong Wan, Linan Shan, Lixia Xi, Zhenyu Xiao, Yang'an Zhang, Xueguang Yuan, Xiaosheng Xiao, Hu Zhang, Xiaoguang Zhang   +8 more
doaj   +1 more source

3D-imaging of polycrystal texture, boundaries using time-domain Brillouin scattering

Scilight, 2021
Textural changes, boundaries and interfaces can be characterized at extreme conditions with modifications to the light scattering technique.
openaire   +1 more source