Optimal control of distributed systems in problems of quartz optical fiber production

2018 ◽  
Author(s):  
Vladimir Pervadchuk ◽  
Darya Vladimirova ◽  
Irina Gordeeva
Keyword(s):  
Optimal Control ◽  
Distributed Systems ◽  
Optical Fiber ◽  
Fiber Production ◽  
Quartz Optical Fiber

Sol-Gel Processing of Optical Fiber

1986 ◽  
Vol 88 ◽  
Author(s):  
M. E. Elias ◽  
A. M. Elias
Keyword(s):  
Optical Fiber ◽  
Transmission Loss ◽  
Amorphous Material ◽  
Sol Gel ◽  
Sintering Process ◽  
Exponential Time ◽  
Fiber Production ◽  
Hydrolytic Polycondensation ◽  
Gel Processing ◽  
Solid Glass

ABSTRACTA new method for optical fiber production is shown. Hydrolytic polycondensation of tetramethoxysilane using a low concentration of α-picoline, 1.56×10−3% in water, gives SiO2 gel which was dried at 22 °C to a transparent amorphous material.The densification process shows an exponential time dependence with a final value of 2.253 g/cm3 after 30 days. The specific surface area of the porous gel varies from 500 to 600 m2/g but pores are eliminated by the sintering process. Before sintering the gel, it is treated under an oxidizing atmosphere above 700 °C. At 1200 °C the pores are eliminated and a solid glass rod obtained.After the sintering process a fiber is obtained from the rod which shows a transmission loss as low as 5.5 dB/km at 840nm.

Nickel Deposition on Pre-Electroless Plated Ni-P-B Coating on Quartz Optical Fiber in a Lanthanide Oxide-Added Watt Electroplating Bath

2011 ◽  
Vol 199-200 ◽  
pp. 421-425
Author(s):  
Bo Quan Jiang ◽  
Jiang Nan Zeng ◽  
Yu De Liu ◽  
Xiao Hong Liu
Keyword(s):  
Optical Fiber ◽  
Deposition Rate ◽  
Current Density ◽  
Fiber Surface ◽  
Nickel Deposition ◽  
Lanthanide Oxide ◽  
Surface Method ◽  
Quartz Optical Fiber ◽  
The Common ◽  
Experimental Values

Lanthanide oxide was added into the common Watt bath to make a thick nickel on the Ni-P-B coating on the quartz optical fiber surface by response surface method. The experiment showed the optimum concentrations of NiSO4•6H2O, CH3（CH2）11OSO3Na and La2O3 as well as current density were separately 220g/L, 0.08g/L, 0.9g/L and 1.0 A/m2 under which the deposition rate reached 24.2μm/h. The established model had an agreement with the experimental values and can be used to predict the deposition rate within the experimental range. The experiment also showed that the deposition rate, structure and other physical properties of the Ni coating prepared with addition of La2O3(0.9g/L) were greatly improved compared with the sample prepared without addition of La2O3 under same conditions.

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