scholarly journals Thermal Stability of Type II Modifications by IR Femtosecond Laser in Silica-based Glasses

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 762 ◽  
Author(s):  
Shu-En Wei ◽  
Yitao Wang ◽  
Heng Yao ◽  
Maxime Cavillon ◽  
Bertrand Poumellec ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Glass Fibers ◽  
Clear Understanding ◽  
Type Ii ◽  
Silica Glasses ◽  
Pure Silica ◽  
Self Organized ◽  
Fs Laser ◽  
Thermal Stability Of ◽  
Glass Viscosity

Femtosecond (fs) laser written fiber Bragg gratings (FBGs) are excellent candidates for ultra-high temperature (>800 °C) monitoring. More specifically, Type II modifications in silicate glass fibers, characterized by the formation of self-organized birefringent nanostructures, are known to exhibit remarkable thermal stability around 1000 °C for several hours. However, to date there is no clear understanding on how both laser writing parameters and glass composition impact the overall thermal stability of these fiber-based sensors. In this context, this work investigates thermal stability of Type II modifications in various conventional glass systems (including pure silica glasses with various Cl and OH contents, GeO2-SiO2 binary glasses, TiO2- and B2O3-doped commercial glasses) and with varying laser parameters (writing speed, pulse energy). In order to monitor thermal stability, isochronal annealing experiments (Δt⁓ 30 min, ΔT⁓ 50 °C) up to 1400 °C were performed on the irradiated samples, along with quantitative retardance measurements. Among the findings to highlight, it was established that ppm levels of Cl and OH can drastically reduce thermal stability (by about 200 °C in this study). Moreover, GeO2 doping up to 17 mole% only has a limited impact on thermal stability. Finally, the relationships between glass viscosity, dopants/impurities, and thermal stability, are discussed.

scholarly journals Thermal Stability of Type II Modifications Inscribed by Femtosecond Laser in a Fiber Drawn from a 3D Printed Preform

2021 ◽  
Vol 11 (2) ◽  
pp. 600
Author(s):  
Yitao Wang ◽  
Shuen Wei ◽  
Maxime Cavillon ◽  
Benjamin Sapaly ◽  
Bertrand Poumellec ◽  
...  
Keyword(s):  
Thermal Stability ◽  
3D Printing ◽  
Femtosecond Laser ◽  
Optical Fibers ◽  
Thermal Performance ◽  
Single Mode ◽  
Type Ii ◽  
Fs Laser ◽  
3D Printed ◽  
Thermal Stability Of

Fiber drawing from a 3D printed perform was recently discussed to go beyond the limitations of conventional optical fiber manufacturing in terms of structure and materials. In this work, the photosensitivity of silica optical fibers to femtosecond laser light, and fabricated by 3D printing a preform, is investigated. The writing kinetics and the thermal performance of Type II modifications are studied by varying the laser pulse energy and investigating the birefringence response of the femtosecond (fs)-laser written structures. Compared with a conventional telecom single mode fiber (SMF28), the fiber made by 3D printing is found to have similar writing kinetics and thermal performance. Additionally, the thermal stability of the imprinted fs-laser induced nanostructures is investigated based on the Rayleigh–Plesset equation, describing a model of nanopores dissolution underpinning Type II modifications with thermal annealing.

scholarly journals Photosensitivity and thermal stability of UV-induced fiber Bragg gratings in phosphate glass fibers

2014 ◽  
Vol 4 (7) ◽  
pp. 1427 ◽  
Author(s):  
Lingyun Xiong ◽  
Peter Hofmann ◽  
Axel Schülzgen ◽  
N. Peyghambarian ◽  
Jacques Albert
Keyword(s):  
Thermal Stability ◽  
Phosphate Glass ◽  
Glass Fibers ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Thermal Stability Of

scholarly journals Thermal Stability of Type II Polyketide Acyl Carrier Proteins

2018 ◽  
Vol 32 (S1) ◽  
Author(s):  
Marco Rivas ◽  
Valentine Courouble ◽  
Ashley Sisto ◽  
Joris Beld ◽  
Bashkim Kokona ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Type Ii ◽  
Carrier Proteins ◽  
Acyl Carrier Proteins ◽  
Thermal Stability Of

scholarly journals Femtosecond laser direct writing in SiO 2 ‐Al 2 O 3 binary glasses and thermal stability of Type II permanent modifications

2020 ◽  
Vol 103 (8) ◽  
pp. 4286-4294 ◽  
Author(s):  
Yitao Wang ◽  
Shuen Wei ◽  
Miss R. Cicconi ◽  
Yuta Tsuji ◽  
Masahiro Shimizu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Femtosecond Laser ◽  
Type Ii ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Thermal Stability Of

The Ordered Phase Formation in Ti-Al-Ga Alloys

1970 ◽  
Vol 28 ◽  
pp. 440-441
Author(s):  
Shiro Fujishiro ◽  
Harold L. Gegel
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Titanium Alloys ◽  
Growth Kinetics ◽  
Stoichiometric Composition ◽  
Good Potential ◽  
Alpha Titanium ◽  
Cold Rolled ◽  
Kinetics Of ◽  
Thermal Stability Of

Ordered-alpha titanium alloys having a DO19 type structure have good potential for high temperature (600°C) applications, due to the thermal stability of the ordered phase and the inherent resistance to recrystallization of these alloys. Five different Ti-Al-Ga alloys consisting of equal atomic percents of aluminum and gallium solute additions up to the stoichiometric composition, Ti3(Al, Ga), were used to study the growth kinetics of the ordered phase and the nature of its interface.The alloys were homogenized in the beta region in a vacuum of about 5×10-7 torr, furnace cooled; reheated in air to 50°C below the alpha transus for hot working. The alloys were subsequently acid cleaned, annealed in vacuo, and cold rolled to about. 050 inch prior to additional homogenization

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