Results 111 to 120 of about 82,664 (317)

Exposed core microstructured optical fiber Bragg gratings: refractive index sensing.

Optics Express, 2014
Bragg gratings have been written in exposed-core microstructured optical fibers for the first time using a femtosecond laser. Second and third order gratings have been written and both show strong reflectivity at 1550 nm, with bandwidths as narrow as 60 ...
S. Warren-Smith, T. Monro
semanticscholar   +1 more source

Quantitative Mapping of Fibrotic Tissue Mechanics via Brillouin Spectroscopy

Journal of Biophotonics, EarlyView.
Brillouin spectroscopy distinguishes fibrotic from healthy tissue based on localized stiffness changes and enables real‐time monitoring of dynamic alterations in viscoelastic properties during fibrogenesis. ABSTRACT Fibrosis is a pathological scarring process that disrupts tissue architecture, and is characterized by excessive extracellular matrix (ECM)
Vsevolod Cheburkanov, Sujeong Jung, Mikhail Y. Berezin, Vladislav V. Yakovlev   +3 more
wiley   +1 more source

Properties of complexly periodic inhomogeneous systems in radio and optical guiding structures

Физика волновых процессов и радиотехнические системы, 2015
We have considered a questions associated with the analysis of the spectral characteristics of fiber Bragg gratings and periodic radio frequency in coaxial cable systems with uniform periodic structure containing a discrete phase shift.
O.G. Morozov, A.R. Nasybullin
doaj  

Few-sensory microwave photonic address measuring system for esophageal manometry

Физика волновых процессов и радиотехнические системы, 2019
In the modern development of high-resolution manometry, the catheter and its elements are used at various levels of examination and treatment of the patient, both in operative and long-term follow-up systems. Therefore, the approach to the catheter as an
A.F. Agliullin, V.V. Purtov, A.Zh. Sakhabutdinov, I.I. Nureev, A.A. Tyazhelova, L.M. Sarvarova, S.V. Vasiliev, I.U. Kurbiev, A.D. Proskuryakov, V.V. Kadushkin   +9 more
doaj   +1 more source

Micro‐Transfer Printed Continuous‐Wave and Mode‐Locked Laser Integration at 800 nm on a Silicon Nitride Platform

Laser &Photonics Reviews, EarlyView.
A heterogeneous III‐V/SiN platform for lasers at 800 nm is realized using the micro‐transfer printing method. Efficient GaAs gain sections are directly butt‐coupled to SiN waveguides, enabling continuous‐wave and mode‐locked extended‐cavity lasers. The mode‐locked lasers generate highly stable pulse trains with repetition rates up to 9.2 GHz and a ...
Max Kiewiet, Stijn Cuyvers, Maximilien Billet, Konstantinos Akritidis, Valeria Bonito Oliva, Gaudhaman Jeevanandam, Sandeep Saseendran, Manuel Reza, Pol Van Dorpe, Roelof Jansen, Joost Brouckaert, Günther Roelkens, Kasper Van Gasse, Bart Kuyken   +13 more
wiley   +1 more source

Characterization of OAM fibers using fiber Bragg gratings.

Optics Express, 2014
The reflectogram of a fiber grating is used to characterize vector modes of an optical fiber supporting orbital angular momentum states. All modes, with a minimal effective index separation around 10(-4), are simultaneously measured.
L. Wang, P. Vaity, B. Ung, Y. Messaddeq, Leslie Ann Rusch, S. Larochelle   +5 more
semanticscholar   +1 more source

Amplification of Light‐Ultrasound Interaction in a Pi‐Shifted Fiber Bragg Grating for Enhanced Ultrasonic Sensitivity

Laser &Photonics Reviews, EarlyView.
By precisely engineering the geometry of a fiber‐based optical resonator, the interaction between confined light and external ultrasound waves is significantly amplified without sacrificing light confinement, boosting the ultrasound detection sensitivity beyond 0.5 mPa/√Hz.
Tai‐Anh La, Rami Shnaiderman, Vasilis Ntziachristos   +2 more
wiley   +1 more source

Effect of radiation and temperature on high temperature resistant fiber Bragg gratings

, 2022
Thomas Blanchet, Romain Cotillard, Adriana Morana, Rudy Desmarchelier, Emmanuel Marin, Y. Ouerdane, A. Boukenter, D. Fourmentel, S. Bréaud, Andrei Gussarov, C. Destouches, Sylvain Girard, Guillaume Laffont   +12 more
openalex   +2 more sources

Pulse Generation by On‐Chip Dispersion Compensation at 8 µm Wavelength

Laser &Photonics Reviews, EarlyView.
This work demonstrates on‐chip pulse generation at 8 μm$\mathrm{\mu}\mathrm{m}$ using chirped Bragg gratings in SiGe graded‐index photonic circuits to compensate the quadratic phase of quantum cascade laser frequency combs. With this approach pulses as short as 1.39 ps were produced, close to the transform limit, representing a key step toward compact,
Annabelle Bricout, Mathieu Bertrand, Philipp Täschler, Barbara Schneider, Victor Turpaud, Stefano Calcaterra, Davide Impelluso, Marco Faverzani, David Bouville, Jean‐René Coudevylle, Samson Edmond, Etienne Herth, Carlos Alonso‐Ramos, Laurent Vivien, Jacopo Frigerio, Giovanni Isella, Jérôme Faist, Delphine Marris‐Morini   +17 more
wiley   +1 more source

Time‐Stretched Interferometric LiDAR with Dispersive Wavenumber‐to‐Time Range Encoding

Laser &Photonics Reviews, EarlyView.
We present a time‐stretched interferometric LiDAR that directly encodes distance into time‐domain interference signals. Operating at 5 MHz with only millimeter‐level coherence length, the system measures up to 12 m with centimeter precision and resolution, achieving high‐speed 3D imaging and dynamic target detection without FFT processing or long ...
Dahun Jung, Gyeong Hun Kim, Seongjin Bak, Jaeheung Kim, Sang Min Park, Wontae Choe, Chang‐Seok Kim, Hwidon Lee   +7 more
wiley   +1 more source