Results 51 to 60 of about 9,055 (249)

High-precision point-by-point fiber Bragg grating inscription

Results in Physics, 2021
The paper presents a novel multi-pass point-by-point method for high-precision inscription of fiber Bragg gratings with a femtosecond laser radiation. The dynamics of the gratings formation is demonstrated in comparison with the classical method of UV ...
Dmitrii V. Przhiialkovskii, Oleg V. Butov   +1 more
doaj   +1 more source

Optical fiber sensing based on reflection laser spectroscopy [PDF]

, 2010
An overview on high-resolution and fast interrogation of optical-fiber sensors relying on laser reflection spectroscopy is given. Fiber Bragg-gratings (FBGs) and FBG resonators built in fibers of different types are used for strain, temperature and ...
De Natale, Paolo, Ralph P. Tatam, Chow, Jong H., Jong H. Chow, Mario Salza, Ballard, Nicholas, Gangopadhyay, Tarun, Paz-Soldan, Daniel, Tatam, Ralph, Ferarro, Pietro, Lam, Timothy T. -Y., Lam, Timothy T-Y, Gianluca Gagliardi, Barnes, Jack A., Daniel Paz-Soldan, Gangopadhyay, Tarun Kumar, Tatam, Ralph P., Chow, Jong, Pietro Ferraro, Tarun K. Gangopadhyay, Jack A. Barnes, Loock, Hans-Peter, Edmond Chehura, Paolo De Natale, Gangopadhyay, Tarun K., Salza, Mario, Ferraro, Pietro, Hans-Peter Loock, Nicholas Ballard, Barnes, Jack, Chehura, Edmon, Gagliardi, Gianluca, Timothy T.-Y. Lam, Lam, Timothy, Chehura, Edmond   +34 more
core   +1 more source

Nanosecond switching of fiber Bragg gratings

Optics Express, 2007
A FBG was written in a two-hole fiber with internal alloy electrodes. Nanosecond high current pulses cause metal expansion, increase birefringence and tune the gratings with a response time of 29 ns. This short length, low loss, all-spliced high-speed wavelength switching devices described here has potential use in Q-switching fiber laser.
Zhangwei, Yu, W, Margulis, O, Tarasenko, H, Knape, P-Y, Fonjallaz   +4 more
openaire   +2 more sources

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

Optical Bend Sensor Based on Eccentrically Micro-Structured Multimode Polymer Optical Fibers

IEEE Photonics Journal, 2021
We report on a novel bend sensor with high flexibility and elasticity based on Bragg grating structures in polymer optical fibers to detect bending for the measurement of movement.
Lennart Leffers, Julia Locmelis, Kort Bremer, Bernhard Roth, Ludger Overmeyer   +4 more
doaj   +1 more source

Polarization properties of interferometrically interrogated fiber Bragg grating and tandem-interferometer strain sensors [PDF]

, 2006
Lead sensitivity in low-coherence interferometric fiber-optic sensors is a well-known problem. It can lead to a severe degradation in the sensor resolution and accuracy through its effect on the fringe visibility and interferometric phase.
Flockhart, G M H, Cranch, G A, Kirkendall, C K   +2 more
core   +1 more source

Photothermal effects in fiber Bragg gratings

Applied Optics, 2006
Writing a fiber Bragg grating in optical fiber generates an intrinsic broadband absorption term that can result in photothermal heating during subsequent use with fiber core guided light. This, in turn, can cause a significant shift of a grating resonance via the thermo-optic coefficient, even at low in-fiber light powers.
Littler, I, Grujic, T, Eggleton, B
openaire   +3 more sources

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

Numerical Analysis of Thermal Dependence of the Spectral Response of Polymer Optical Fiber Bragg Gratings [PDF]

Iraqi Journal for Electrical and Electronic Engineering, 2016
The thermal dependence of the spectral response (i.e. transmission, reflection and time delay (
r) responses) of uniform polymer optical fiber (POF) Bragg gratings has been investigated. In addition to the temperature dependence, the effects of grating
Hisham K. Hisham
doaj  

Tilted Fiber Bragg Gratings (TFBGs) Temperature Sensing Element Using 244nm AR+ Laser Written on Side Hole Fiber

Diyala Journal of Engineering Sciences, 2015
Tilted Fiber Bragg Gratings (TFBGs) are designed and implemented at the 1550 nm communication window in Institute of Optoelectronic Technology, China Jiliang University, Hangzhou, China.
Riyadh Khlf Ahmed, Khalil I. Hajim , Jingyi Yang , Xinyong Dong   +3 more
doaj   +1 more source