Results 51 to 60 of about 9,142 (254)

Long period fiber gratings in anti-resonant hollow core fiber

Applied Physics Express
Long period gratings, based on anti-resonant hollow core fibers (AR-HCFs), are fabricated using a high-frequency CO _2 laser pulse by carving periodic grooves. This device exhibits both axial strain and bending sensing characteristics.
Ligang Huang, Yanxiang Zhao, Yujia Li, Shunli Liu, Hailin Zhou, Lei Gao, Leilei Shi, Guiyao Zhou, Tao Zhu   +8 more
doaj   +1 more source

Elasticity‐Driven Periodic Polarization Patterns in a Chiral Ferroelectric Nematic Fluid

Advanced Materials, EarlyView.
Chiral polar ferroelectric nematic fluids exhibit spontaneous formation of stripe, square, and hexagonal polarization textures under confinement. Controlled by thickness and anchoring, these patterns produce spatially modulated nonlinear optical responses.
Anej Sterle, Peter Medle Rupnik, Luka Cmok, Aitor Erkoreka, Marta Lavrič, Natan Osterman, Calum J. Gibb, Jordan Hobbs, Josu Martinez‐Perdiguero, Richard J. Mandle, Alenka Mertelj, Nerea Sebastián   +11 more
wiley   +1 more source

Monitoring of Curing Process of Epoxy Resin by Long-Period Fiber Gratings

Sensors
The curing of epoxy resin is a complex thermo-chemical process that is difficult to monitor using existing sensing systems. We monitored the curing process of an epoxy resin by using long-period fiber gratings.
Oleg V. Ivanov, Kaushal Bhavsar, Oliver Morgan-Clague, James M. Gilbert   +3 more
doaj   +1 more source

3D Printed Photon Shield Assembly for Low‐Noise Visual Stimulation During Two‐Photon Imaging in Mice

Advanced Materials Technologies, EarlyView.
We present the Photon Shield, an open‐hardware system for low‐noise two‐photon calcium imaging during visual stimulation in mice. Combining a 3D‐printed headplate and rail‐mounted shield substantially reduces stray‐light contamination, as quantitatively verified. Functional validation confirms reliable cortical responses. Open design files enable broad
Gergely Katona, Andrea Slézia, András Dávid, Ábel Petik, Dániel Hillier, István Ulbert, Attila Kaszás   +6 more
wiley   +1 more source

Long Period Bragg Grating in Coaxial Transmission Lines

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
This work shows the utilization of a coaxial cable for the fabrication of a long period Bragg grating. The grating is fabricated removing the dielectric in short pieces of the cable so that the discontinuities account for the variation in the medium ...
Sergio Luiz Stevan Jr, José Jair Alves Mendes Júnior, Frederich Conrad Janzen, Murilo Leme Oliveira, Alexandre de Almeida Prado Pohl   +4 more
doaj   +1 more source

Experimental Study of the Refractive Index Sensitivity in Arc-induced Long Period Gratings

IEEE Photonics Journal, 2017
This paper presents an experimental study of the sensitivity characteristics to the surrounding refractive index (SRI) in arc-induced long period gratings (LPGs), in order to outline their dependence over the fabrication parameters.
Flavio Esposito, Rajeev Ranjan, Stefania Campopiano, Agostino Iadicicco   +3 more
doaj   +1 more source

Photoluminescence Reshaping via Structural Confinement and Local Density of Optical States Control in Ir(III)‐Doped Biodegradable Metasurfaces

Advanced Materials Technologies, EarlyView.
Phosphorescent biodegradable metasurface showing vibronic selection and spectral photoluminescence narrowing. Anti‐correlation between experimental LDOS and measured lifetimes. ABSTRACT Metasurfaces incorporating phosphorescent emitters offer a route to engineer radiative and vibronic processes beyond chemical design.
Vincenzo Caligiuri, Andrea Smeriglio, Svetlana Siprova, Olga Favale, Francesca Leone, Roberto Termine, Debora Policastro, Alessandra Crispini, Attilio Golemme, Nicolas Godbert, Iolinda Aiello, Antonio De Luca   +11 more
wiley   +1 more source

Fabrication of long period fiber gratings of subnanometric bandwidth [PDF]

Optics Letters, 2017
This Letter reports on the fabrication of long period fiber gratings having subnanometric bandwidths in the 1500 nm spectral region. Large gratings have been photo inscribed in a high NA fiber; the grating pitch and the order of the HE cladding mode are optimized to produce gratings with a large number of periods and prevent the coupling to TE, TM, or ...
Poveda-Wong, L., Cruz Muñoz, José Luis, Delgado-Pinar, Martina, Roselló-Mechó, Xavier, Díez Cremades, Antonio, Andrés, Miguel V.   +5 more
openaire   +3 more sources

Microscale 3D‐Printed Digital Strain Switches for Embedded Mechanical Computation

Advanced Materials Technologies, EarlyView.
Microscale 3D‐printed strain switches on flexible films convert deformation into native digital signals at geometry defined thresholds. A closed form model predicts switching from 3000 to 15 000 microstrain and is validated across 110 devices. Reliable ohmic closure and strain activated AND, OR, and XOR logic point toward low‐power mechanical ...
Regan Kubicek, Daniel Quinn, Gabriel Smith, Sarah Bergbreiter   +3 more
wiley   +1 more source

Recent Progress in Fabrications and Applications of Heating-Induced Long Period Fiber Gratings

Sensors, 2019
This paper presents a review of our work concerning the recent progress in fabrications and applications of heating-induced long period fiber gratings (LPFGs).
Cailing Fu, Yiping Wang, Shen Liu, Zhiyong Bai, Changrui Liao, Jun He, Ying Wang   +6 more
doaj   +1 more source