scholarly journals Intelligent Technical Textiles Based on Fiber Bragg Gratings for Strain Monitoring

Sensors ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 2951
Author(s):  
Petr Munster ◽  
Tomas Horvath
Keyword(s):  
Optical Fibers ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Concept Design ◽  
System A ◽  
Strain Monitoring ◽  
Technical Textiles ◽  
Low Profile ◽  
Basic Measurement ◽  
Textile Block

In this paper, the concept design of intelligent technical textile blocks implemented with optical fibers that include fiber Bragg gratings for strain and temperature sensing is briefly introduced. In addition to the main design of the system, a design of measurement blocks with integrated fiber Bragg grating elements for strain measurement is also presented. In the basic measurement, the created textile block was tested for deformation sensitivity when a load was applied. Moreover, a unique robust and low profile connector was designed, created and verified. The fibers are terminated with GRIN lenses, allowing easy manipulation and completion of the connector in the field, with an average insertion loss of 5.5 dB.

scholarly journals Monitoring of Torque Induced Strain in Composite Shafts with Embedded and Surface-Mounted Optical Fiber Bragg Gratings

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2403
Author(s):  
Maria Konstantaki ◽  
Georgios Violakis ◽  
Georgios A. Pappas ◽  
Thomas Geernaert ◽  
Nikos Korakas ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Filament Winding ◽  
Strain Monitoring ◽  
Reinforced Polymer ◽  
Applied Torque ◽  
Reinforcing Fibers ◽  
Load Monitoring

In this study, silica glass, optical fiber Bragg gratings (FBGs) are used for torque-induced strain monitoring in carbon fiber reinforced polymer (CFRP) hollow shafts toward the development of a methodology for structural load monitoring. Optical fibers with gratings are embedded during shaft manufacturing, by an industrial filament winding process, along different orientations with respect to its central axis and surface mounted after production. Experimental results are supported by numerical modeling of the shaft with appropriate boundary conditions and homogenized material properties. For an applied torque up to 800 Nm, the strain sensitivity of an embedded grating positioned along the reinforcing fibers’ direction winded under 55° is in the order of 3.6 pm/Nm, while this value is more than 4× times higher than the other examined orientations. The study also shows that surface-mounted optical fiber Bragg gratings along the reinforcing carbon fibers’ direction perform equally well in monitoring strains in composite shafts under torque.

Characterization of Optical Fibers Supporting OAM States using Fiber Bragg Gratings

CLEO: 2014 ◽  
2014 ◽  
Author(s):  
L. Wang ◽  
B. Ung ◽  
P. Vaity ◽  
L. A. Rusch ◽  
Y. Messaddeq ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings

scholarly journals Recent Achievements on Grating Fabrications in Polymer Optical Fibers with Photosensitive Dopants: A Review

Polymers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 273
Author(s):  
Jie Jiang ◽  
Nan Zhang ◽  
Rui Min ◽  
Xin Cheng ◽  
Hang Qu ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Refractive Index Change ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Fiber Gratings ◽  
Comprehensive Overview ◽  
Broad Perspective ◽  
Long Period Fiber Gratings ◽  
Polymer Optical Fibers ◽  
Chirped Fiber Bragg Gratings

This review discusses recent achievements on grating fabrications in polymer optical fibers doped with photosensitive materials. First, different photosensitive dopants in polymer optical fibers (POFs) are summarized, and their refractive index change mechanisms are discussed. Then, several different doping methods to fabricate the photosensitive POFs are presented. Following that, the principles of gratings, including standard fiber Bragg gratings (FBGs), tilted fiber Bragg gratings (TFBGs), chirped fiber Bragg gratings (CFBGs), phase-shifted fiber Bragg gratings (PSFBGs), and long period fiber gratings (LPFGs), are reported. Finally, fabrications of different gratings based on photosensitive POFs in the last 20 years are reported. We present our article clearly and logically, so that it will be helpful for researchers to explore a broad perspective on this proposed topic. Overall, the content provides a comprehensive overview of photosensitive POF fabrications and grating inscriptions in photosensitive POFs, including previous breakthroughs and recent advancements.

Effect of two annealing processes on the thermal regeneration of fiber Bragg gratings in hydrogenated standard optical fibers

2018 ◽  
Vol 57 (24) ◽  
pp. 6971 ◽  
Author(s):  
Kai Lu ◽  
Hangzhou Yang ◽  
Kok-Sing Lim ◽  
Harith Ahmad ◽  
Pan Zhang ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Thermal Regeneration

Technique for writing of fiber Bragg gratings over or near preliminary formed macro-structure defects in silica optical fibers

2017 ◽  
Author(s):  
Alexander S. Evtushenko ◽  
Lenar M. Faskhutdinov ◽  
Anastasia M. Kafarova ◽  
Vadim S. Kazakov ◽  
Artem A. Kuznetzov ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Structure Defects
Sign in / Sign up

Export Citation Format

Share Document