Statistical analysis of the 800 nm fs-laser inscription conditions on the characteristics and thermal stability of FBGs inscribed in fluorine-doped optical fibers

2018 ◽  
Author(s):  
A. Morana ◽  
E. Marin ◽  
L. Lablonde ◽  
G. Melin ◽  
T. Robin ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Statistical Analysis ◽  
Optical Fibers ◽  
Fs Laser ◽  
Thermal Stability Of

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.

Thermal Stability of Specialty Optical Fibers

2008 ◽  
Vol 26 (20) ◽  
pp. 3443-3451 ◽  
Author(s):  
Andrei A. Stolov ◽  
Debra A. Simoff ◽  
Jie Li
Keyword(s):  
Thermal Stability ◽  
Optical Fibers ◽  
Thermal Stability Of

Using Microthermostatting to Increase Thermal Stability of On-Board Electronics

2020 ◽  
pp. 18-36
Author(s):  
D.V. Ozerkin ◽  
V.O. Bondarenko
Keyword(s):  
Thermal Stability ◽  
Statistical Analysis ◽  
Circuit Simulation ◽  
Simulation Software ◽  
Factorial Experiment ◽  
Topology Design ◽  
Temperature Error ◽  
Voltage Regulator ◽  
Error Equation ◽  
Thermal Stability Of

The paper considers a promising temperature control method for electronic equipment, that is, microthermostatting, which is characterised by maintaining a stable temperature in specific electric and radio devices. We show that the temperature error equation may be the most universal mathematical model for developing microthermostatted electronics. Statistical analysis methods concerning operation modes of an electronic circuit used in a device make it possible to obtain a regression model that forms the basis for deriving the temperature error equation. We propose to replace a physical factorial experiment with a numerical factorial experiment in order to reduce the time spent performing the statistical analysis. We note that it may be possible to implement this numerical factorial experiment using well-known circuit simulation software packages. The general form of the temperature error equation enables us to conclude that in the process of investigating the thermal stability of an electronic device there arise three subproblems: 1) the problem of synthesising fitting mathematical models for the electric and radio equipment; 2) the circuit modelling problem regarding the circuit used; 3) the topology design problem for computing the temperature field. In the experimental part of our investigation, we propose a simple design for a heater microthermostat in a voltage regulator. A feature of the microthermostat design is a microcontroller to form corrective actions affecting the actuators. In our studies we compared two voltage regulator designs: 1) without thermostatting; 2) using microthermostatting. We show that the thermostatted option displays thermal stability that is 2.68 times higher than that of the basic option

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.

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