Results 31 to 40 of about 8,419 (298)

Multiplexing of fiber-optic long-period grating-based interferometric sensors [PDF]

, 2007
Two long-period gratings (LPGs) fabricated in series in an optical fiber form a Mach-Zehnder interferometer, producing a sinusoidal channelled spectrum within the characteristic LPG attenuation bands, which has the appearance of an interference fringe ...
Tatam, Ralph P., James, Stephen W., Murphy, Richard P.   +2 more
core   +1 more source

Fiber Bragg Grating Bonding Characterization under Long-Period Cyclic Loading

Photonics, 2023
The Smart Landing Gear system to be developed in the framework of the ANGELA project provides the strain measurements on landing gear structure at landings, and this system should be maintained efficiently under operational conditions.
Angela Brindisi, Cristian Vendittozzi, Costanzo Bellini, Vittorio Di Cocco, Lidia Travascio, Luigi Di Palma, Marika Belardo, Antonio Concilio   +7 more
doaj   +1 more source

Cure monitoring of a UV cured epoxy resin using a long period grating Mach- Zehnder interferometer [PDF]

, 2007
A cascaded long period grating Mach-Zehnder interferometer is used to monitor the change in refractive index of a UV cured epoxy resin over a cure cycle.
Richard P. Murphy, Stephen J. Buggy, Ralph P. Tatam, Tatam, Ralph P., James, Stephen W., Buggy, Stephen J., Stephen W. James, Murphy, Richard P.   +7 more
core   +1 more source

Long Period Fiber Grating Fabrication by Two-Step Infrared Femtosecond Fiber Laser Exposure

IEEE Photonics Journal, 2017
We develop a two-step infrared (IR) femtosecond fiber laser exposure technique to flexibly fabricate long period fiber gratings (LPFGs) with a high peak band-rejection efficiency of 35.4 dB, insertion loss of 4.36 dB, and 3 dB ...
Cong Zhang, Li Cheng, Songnian Fu, Ming Tang, Deming Liu   +4 more
doaj   +1 more source

Dynamic Responses Measured by Optical Fiber Sensor for Structural Health Monitoring

Applied Sciences, 2019
An optical fiber sensing system integrating a fiber Bragg grating (FBG) sensor, a long-period fiber grating (LPFG) optical filter and a photodetector is presented to monitor the dynamic response of a structure subjected to base excitation and impact ...
Shiuh-Chuan Her, Shin-Chieh Chung
doaj   +1 more source

All-optical 160 Gbit/s retiming system using fiber grating based pulse shaping technology [PDF]

, 2009
This paper demonstrates a retiming system operating at rates of 40 and 160 Gbit/s, which incorporates a superstructured fiber Bragg grating (SSFBG) as a pulse shaping element.
Galili, Michael, Ibsen, M., Petropoulos, P., Ibsen, Morten, Richardson, D.J., Richardson, David J., Zibar, Darko, Parmigiani, Francesca, Clausen, Anders, Petropoulos, Periklis, Oxenløwe, Leif Katsuo, Parmigiani, F., Clausen, Anders Thomas, Jeppesen, Palle   +13 more
core   +1 more source

Response of a fibre optic long period grating operating at the phase matching turning point to the deposition of a nanostructured coating [PDF]

, 2009
The response of the transmission spectrum of a fibre optic long period grating operating near the phase matching turning point to the deposition of a nanostructured coating is investigated.
S. M. Topliss, R. P. Tatam, Tatam, Ralph P., S. W. James, James, Stephen W., Topliss, Stephen M., Cheung, Sammy C., S. C. Cheung   +7 more
core   +1 more source

Long Period Grating-Based Fiber Coupling to WGM Microresonators

Micromachines, 2018
A comprehensive model for designing robust all-in-fiber microresonator-based optical sensing setups is illustrated. The investigated all-in-fiber setups allow light to selectively excite high-Q whispering gallery modes (WGMs) into optical microresonators,
Francesco Chiavaioli, Dario Laneve, Daniele Farnesi, Mario Christian Falconi, Gualtiero Nunzi Conti, Francesco Baldini, Francesco Prudenzano   +6 more
doaj   +1 more source

Arc-Induced Long-Period Fiber Gratings at INESC TEC. Part II: Properties and Applications in Optical Communications and Sensing

Sensors, 2021
In this work, we review the most important achievements of INESC TEC related to the properties and applications of arc-induced long-period fiber gratings.
Gaspar Rego, Paulo Caldas, Oleg V. Ivanov   +2 more
doaj   +1 more source

Manufacturing and Spectral Features of Different Types of Long Period Fiber Gratings: Phase-Shifted, Turn-Around Point, Internally Tilted, and Pseudo-Random

Fibers, 2017
The manufacturing and spectral features of different types of long period fiber gratings (LPFGs), ranging from phase-shifted, turn-around point, and internally tilted gratings, to pseudo-random gratings, are described and discussed in detail.
Francesco Chiavaioli, Francesco Baldini, Cosimo Trono   +2 more
doaj   +1 more source