Effect of cladding layer glass transition temperature on thermal resistance of graded-index plastic optical fibers

2014 ◽  
Vol 46 (11) ◽  
pp. 823-826 ◽  
Author(s):  
Hirotsugu Yoshida ◽  
Ryosuke Nakao ◽  
Yuki Masabe ◽  
Kotaro Koike ◽  
Yasuhiro Koike
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Thermal Resistance ◽  
Optical Fibers ◽  
Graded Index ◽  
Cladding Layer ◽  
Plastic Optical Fibers

New Stable Iodide Glasses in the Cd-As-I and Cd-As-Ge-I Systems

1989 ◽  
Vol 172 ◽  
Author(s):  
Jong Heo ◽  
George H. Sigel
Keyword(s):  
Differential Scanning Calorimetry ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Optical Fibers ◽  
Liquid Water ◽  
Infrared Region ◽  
Chemical Durability ◽  
Scanning Calorimetry ◽  
Glass Forming

AbstractIodide glasses presently being investigated suffer from their poor glass forming abilities, thermal instabilities and general lack of chemical durability. Glasses in the Cd-As-I and Cd-As-Ge-I systems are investigated in this study for the purpose of developing water-resistant, thermally stable iodide glasses and optical fibers. Differential scanning calorimetry(DSC) showed that glasses in these systems have glass transition temperature(Tg) values above 300°C. Devitrification of glasses during cooling and reheating can be suppressed by incorporating small amount of Ge atoms into ternary Cd-As-I glasses. They are transparent up to 14μm in the infrared region with excellent durability against liquid water at 90°C.

Study of the Glass Transition Temperature of As-S Glasses for the Fabrication of Chalcogenide Optical Fibers

2013 ◽  
Vol 4 (3) ◽  
pp. 256-265 ◽  
Author(s):  
Igor V. Skripachev ◽  
Mohamed El-Amraoui ◽  
Younes Messaddeq ◽  
Silvia H. Santagneli
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Optical Fibers

The Preliminary Research on the Coating of FBG Embedded in Composites used in Large Aircraft

2011 ◽  
Vol 239-242 ◽  
pp. 540-543
Author(s):  
Yan Zi Yin ◽  
Ji Hui Wang ◽  
Han Li ◽  
Jiu Xiao Sun ◽  
Heng Tian ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Optical Fiber ◽  
Optical Fibers ◽  
Heating Temperature ◽  
Uv Curable ◽  
Fbg Sensors ◽  
Preliminary Research ◽  
Large Aircraft

The optical fibers with epoxy acrylates and urethane acrylates UV-curable coatings were embedded in composites. It’s found that after high-temperature heated, when the coating’s glass transition temperature was higher than the heating temperature, the microstructure of the coating would not change, but when the coating’s glass transition temperature was lower than the heating temperature, the coating would detached from optical fiber. FBG (fiber Bragg grating) sensors with coating and naked FBG (without coating) sensors were embedded in composite materials to monitor impacting damage. It was found that when the coating broke away from the optical fiber which was embedded in the composites, the sensitivity of the FBG sensors would reduce.

scholarly journals Development of Epoxy-Polyester Composite with Improved Thermophysical Properties for Restoration of Details of Sea and River Transport

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
A. Buketov ◽  
M. Brailo ◽  
S. Yakushchenko ◽  
A. Sapronova
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Thermal Resistance ◽  
Thermophysical Properties ◽  
Polyester Resin ◽  
Linear Shrinkage ◽  
Nonlinear Dependence ◽  
Thermal Coefficient ◽  
Polyester Matrix

The results of the experimental investigations of the optimization of the content of the polyester resin in the epoxy binder are shown in the work. It was determined that composite with concentration of the polyester (q = 10 mas.fr.) was characterized by the maximal values of the thermophysical properties. The Martens thermal resistance temperature, the linear shrinkage, the thermal coefficient of linear expansion, and the glass transition temperature of the epoxy-polyester matrix were investigated. It was found that introducing the polyester resin into the epoxy oligomer in quantity of q = 10 mas.fr. leads to improving the Martens thermal resistance of the material to the T = 352 K and decreasing the linear shrinkage to the Δl = 0.06%. The nonlinear dependence of the TCLE on the temperature was confirmed, and the tendency of changes in their values, depending on the content of polyester resin, was defined. The dilatometric curves were analyzed, and the glass transition temperature of developed epoxy-polyester matrix was determined at the level Tс = 318 K.

scholarly journals Theoretical Investigation of the Influence of Wavelength on the Bandwidth in Multimode W-Type Plastic Optical Fibers with Graded-Index Core Distribution

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3973
Author(s):  
Ana Simović ◽  
Svetislav Savović ◽  
Branko Drljača ◽  
Alexandar Djordjevich ◽  
Rui Min
Keyword(s):  
Optical Fibers ◽  
Power Flow ◽  
Flow Equation ◽  
Time Dependent ◽  
Refractive Indices ◽  
Modal Dispersion ◽  
Graded Index ◽  
Cladding Layer ◽  
Plastic Optical Fibers ◽  
Outer Cladding

The bandwidth of multimode W-type plastic optical fibers (POFs) with graded-index (GI) core distribution is investigated by solving the time-dependent power flow equation. The multimode W-type GI POF is designed from a multimode single-clad (SC) GI POF fiber upon modification of the cladding layer of the latter. Results show how the bandwidth in W-type GI POFs can be enhanced by increasing the wavelength for different widths of the intermediate layer and refractive indices of the outer cladding. These fibers are characterized according to their apparent efficiency to reduce modal dispersion and increase bandwidth.

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