scholarly journals Induced nanoscale changes with low temperature annealing inside composite optical fibres probed by strain-insensitive long period gratings

2015 ◽  
Vol 6 (1) ◽  
pp. 58 ◽  
Author(s):  
Wen Liu ◽  
John Canning ◽  
Kevin Cook ◽  
Cicero Martelli
Keyword(s):  
Low Temperature ◽  
Optical Fibres ◽  
Long Period ◽  
Low Temperature Annealing ◽  
Long Period Gratings

Strain sensing using long period gratings in microstructured polymer optical fibres

2011 ◽  
Author(s):  
Richard Lwin ◽  
Alexander Argyros ◽  
Sergio G. Leon-Saval ◽  
Maryanne C. J. Large
Keyword(s):  
Optical Fibres ◽  
Strain Sensing ◽  
Long Period ◽  
Long Period Gratings ◽  
Microstructured Polymer Optical Fibres

Long-period gratings in optical fibres for chemical sensor applications

2005 ◽  
Vol 16 (11) ◽  
pp. 2221-2228 ◽  
Author(s):  
Igor Peshko ◽  
Owen Cherry ◽  
Tim Rutkevich ◽  
Bernard Hockley ◽  
Vladimir Rubtsov
Keyword(s):  
Chemical Sensor ◽  
Optical Fibres ◽  
Sensor Applications ◽  
Long Period ◽  
Long Period Gratings

Optical fibre for fabricating long-period gratings with low temperature sensitivity within selected temperature range

2005 ◽  
Vol 41 (20) ◽  
pp. 1106
Author(s):  
J.A. Farroni ◽  
A.L.G. Carter ◽  
V. Grubsky ◽  
K. Tankala ◽  
N.J. Jacobson ◽  
...  
Keyword(s):  
Low Temperature ◽  
Optical Fibre ◽  
Temperature Sensitivity ◽  
Temperature Range ◽  
Long Period ◽  
Long Period Gratings

Micromachining Long Period Gratings in Optical Fibres using Focused Ion Beam

2007 ◽  
Author(s):  
Cicero Martelli ◽  
Paolo Olivero ◽  
John Canning ◽  
Nathaniel Groothoff ◽  
Steven Prawer ◽  
...  
Keyword(s):  
Focused Ion Beam ◽  
Ion Beam ◽  
Optical Fibres ◽  
Long Period ◽  
Long Period Gratings

Low-temperature annealing of YBa2Cu3O7-x

1992 ◽  
Vol 50 (1) ◽  
pp. 88-89
Author(s):  
R.L. Sabatini ◽  
Yimei Zhu ◽  
Masaki Suenaga ◽  
A.R. Moodenbaugh
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Low Temperature ◽  
Oxygen Diffusion ◽  
Diffusion Rate ◽  
Oxygen Depletion ◽  
Low Temperature Annealing ◽  
Transmission Electron ◽  
Microstructural Effects ◽  
Oxygen Diffusion Rate

Low temperature annealing (<400°C) of YBa2Cu3O7x in a ozone containing oxygen atmosphere is sometimes carried out to oxygenate oxygen deficient thin films. Also, this technique can be used to fully oxygenate thinned TEM specimens when oxygen depletion in thin regions is suspected. However, the effects on the microstructure nor the extent of oxygenation of specimens has not been documented for specimens exposed to an ozone atmosphere. A particular concern is the fact that the ozone gas is so reactive and the oxygen diffusion rate at these temperatures is so slow that it may damage the specimen by an over-reaction. Thus we report here the results of an investigation on the microstructural effects of exposing a thinned YBa2Cu3O7-x specimen in an ozone atmosphere using transmission electron microscopy and energy loss spectroscopy techniques.

Long Period Gratings in Multimode Fiber Fabricated with High-Energy Ion Implantation

2003 ◽  
Vol 22 (4) ◽  
pp. 225-237
Author(s):  
K. J. GRANT ◽  
ROBERTS A. ◽  
D. N. JAMIESON ◽  
B. ROUT ◽  
C. CHER
Keyword(s):  
Ion Implantation ◽  
High Energy ◽  
Multimode Fiber ◽  
Long Period ◽  
Long Period Gratings

scholarly journals UV Inscription and Pressure Induced Long-Period Gratings through 3D Printed Amplitude Masks

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 1977
Author(s):  
Ricardo Oliveira ◽  
Liliana M. Sousa ◽  
Ana M. Rocha ◽  
Rogério Nogueira ◽  
Lúcia Bilro
Keyword(s):  
State Of The Art ◽  
Low Cost ◽  
Resonance Wavelength ◽  
Complex Structures ◽  
Pressing Method ◽  
Long Period ◽  
Long Period Gratings ◽  
3D Printed ◽  
Mechanical Pressing ◽  
First Time

In this work, we demonstrate for the first time the capability to inscribe long-period gratings (LPGs) with UV radiation using simple and low cost amplitude masks fabricated with a consumer grade 3D printer. The spectrum obtained for a grating with 690 µm period and 38 mm length presented good quality, showing sharp resonances (i.e., 3 dB bandwidth < 3 nm), low out-of-band loss (~0.2 dB), and dip losses up to 18 dB. Furthermore, the capability to select the resonance wavelength has been demonstrated using different amplitude mask periods. The customization of the masks makes it possible to fabricate gratings with complex structures. Additionally, the simplicity in 3D printing an amplitude mask solves the problem of the lack of amplitude masks on the market and avoids the use of high resolution motorized stages, as is the case of the point-by-point technique. Finally, the 3D printed masks were also used to induce LPGs using the mechanical pressing method. Due to the better resolution of these masks compared to ones described on the state of the art, we were able to induce gratings with higher quality, such as low out-of-band loss (0.6 dB), reduced spectral ripples, and narrow bandwidths (~3 nm).

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