Results 61 to 70 of about 58,600 (289)

Optimized pulse source employing an externally injected gain-switched laser diode in conjunction with a nonlinearly chirped grating [PDF]

, 2006
In this paper, we demonstrate the generation of transform-limited short optical pulses, which display excellent spectral and temporal qualities by employing a novel technology, based on an externally injected gain-switched laser in conjunction with a ...
Anandarajah, Prince M., Barry, Liam P., Clarke, Aisling M., Edvell, G., Guignard, Celine, Harvey, John D., Reid, Douglas A., Rensing, Marc   +7 more
core   +1 more source

Experimental Study and Analysis of Hydrostatic Pressure Sensitivity of Polymer Fibre Bragg Gratings

Journal of Lightwave Technology, 2015
The intrinsic hydrostatic pressure sensitivity of polymer optical fiber Bragg grating (POFBG) with different diameters are investigated. POFBGs are inscribed in single-mode polymer fiber and etched down to different diameters.
K. Bhowmik, G. Peng, Yanhua Luo, E. Ambikairajah, V. Lovric, W. Walsh, G. Rajan   +6 more
semanticscholar   +1 more source

Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications

Advanced Functional Materials, EarlyView.
Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai, Md Shakhawath Hossain, Nhat Minh Nguyen, Yongliang Chen, Chaohao Chen, Xiaoxue Xu, Quang Thang Trinh, Toan Dinh, Toan Trong Tran   +8 more
wiley   +1 more source

Smart sensors in asphalt: monitoring key process parameters during and post construction

Spool, 2017
The Fibre Bragg Gratings (FBG) technology based on integrated photonics, offers specific benefits including thermal mapping, damage detection, shape- and distributed sensing. This makes it useful for determining pavement behaviour during extreme weather
Seirgei Miller, Joyraj Chakraborty, Jurian van der Vegt, Daan Brinkerink, Sandra Erkens, Xueyan Liu, Kumar Anupam, Berwich Sluer, Mohamad Mohajeri   +8 more
doaj   +5 more sources

Smartphone Interrogation of Narrow Bragg Gratings in G.652 Fibre [PDF]

EPJ Web of Conferences
Transmission and reflection spectra of FBG in the visible region are seen and measured with a smartphone coupled portable apparatus. Standard G.652 optical fibre is used, operating in a few-mode regime.
Madeira Marcos, Santos Álvaro, Oliveira Valmir, Kalinowski Hypolito   +3 more
doaj   +1 more source

Regenerated gratings [PDF]

Journal of the European Optical Society-Rapid Publications, 2009
Strong regenerated gratings with a maximum grating strength exceeding (40–50) dB are fabricated inside an optical fibre by bulk macro thermal processing ∼ 900°C using a UV-laser seeded Bragg grating. Further annealing between 1000°C and 1100°C leads to a
Canning John, Bandyopadhyay Somnath, Stevenson Michael, Biswas Palas, Fenton Jacob, Aslund Mattias   +5 more
doaj   +1 more source

Refractometric Properties of a TFBG Sensor Demodulated Using α-Shape Modified Delaunay Triangulation

Optics, 2021
In our previous research, a novel demodulation technique based on α-shape Delaunay triangulation (D-T) was developed to obtain the refractive index of the medium surrounding the optical fibre using the envelope of the cladding peaks from the spectrum of ...
Luigi Fazzi, Roger M. Groves
doaj   +1 more source

Effects of high temperature and pressure on silica optical fibre sensors

, 1998
We report on the effects of liquids at high temperature and pressure on silica optical fibres, sensors and gratings. We propose that the diffusion of molecules into the silica and the resultant expansion of the network are responsible for observed fibre ...
Clowes, J.R., McInnes, J., Payne, D.N., Zervas, M.N.   +3 more
core   +1 more source

Mechanically Tunable Bone Scaffolds: In Vivo Hardening of 3D‐Printed Calcium Phosphate/Polycaprolactone Inks

Advanced Functional Materials, EarlyView.
A 3D bone scaffold with osteogenic properties and capable of hardening in vivo is developed. The scaffold is implanted in a ductile state, and a phase transformation of the ceramic induces the stiffening and strengthening of the scaffold in vivo. Abstract Calcium phosphate 3D printing has revolutionized customized bone grafting.
Miguel Mateu‐Sanz, Pablo Varela, Laura del‐Mazo‐Barbara, Irene Lodoso‐Torrecilla, Emilio Jiménez‐Piqué, Jordi Franch, Miguel Alaminos, Maria‐Pau Ginebra   +7 more
wiley   +1 more source

Fast Bragg Grating Inscription in PMMA Polymer Optical Fibres: Impact of Thermal Pre-Treatment of Preforms

Sensors, 2017
In this work, fibre Bragg gratings (FBGs) were inscribed in two different undoped poly- (methyl methacrylate) (PMMA) polymer optical fibres (POFs) using different types of UV lasers and their inscription times, temperature and strain sensitivities are ...
Carlos A. F. Marques, Andreas Pospori, Gökhan Demirci, Onur Çetinkaya, Barbara Gawdzik, Paulo Antunes, Ole Bang, Pawel Mergo, Paulo André, David J. Webb   +9 more
doaj   +1 more source