Results 51 to 60 of about 10,558 (240)

Controlled fabrication of tunable delay using compound phase shifted resonators [PDF]

, 2010
Fine tuned, narrowband group delay (“slow light”) is obtained using a compound phase shifted grating and superposing resonances.
Canning, John, Niewczas, Pawel, Orr, Philip, Stevenson, Michael   +3 more
core   +2 more sources

Optoelectrical Devices for Neural Interfacing: Engineering Integration, Stability, and Multimodal Sensing

Advanced Healthcare Materials, EarlyView.
Implantable optoelectrical devices are an effective resource for the modulation and monitoring of neural activity with high spatiotemporal resolution. This review discusses current challenges faced by these devices and outlines future perspectives for the development of next‐generation neural interfaces targeting chronic, multisite, and multimodal ...
Stella Aslanoglou, Barbara Spagnolo, Antonio Balena, Massimo De Vittorio, Ferruccio Pisanello   +4 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

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +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

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

Localized Temperature Monitoring in Mouse Brain during Light Delivery via a Non‐Planar Tapered Fiber‐Integrated µRTD Sensor

Advanced Materials, EarlyView.
We report a multifunctional tapered optical fiber integrating a conformal micro‐resistance temperature detector (µRTD) for local, real‐time thermometry during optical stimulation. The platform combines light‐delivery and temperature sensing within a minimally invasive footprint, enabling detection of sub‐degree cortical heating under representative ...
Antonio Balena, Marco Bianco, Barbara Spagnolo, Muhammad Fayyaz Kashif, Alberto Bramati, Massimo De Vittorio, Ferruccio Pisanello   +6 more
wiley   +1 more source