Lect1 2016
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Transcript of Lect1 2016
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Comunicatii optice
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1нм=10–9м =10–7см=10–3 мкм.
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Clasif. Material de
bazâ, %
Impuritâți, %
A1 99,9 0,1
B2 99,99 0,01
B3 99,999 0,001
B4 99,9999 0,0001
C5 99,99999 0,00001
... .... ....
C10 99,99.... 10-10
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PROPRIETĂȚILE CUARȚULUI
Denumirematerialului
Material debazâ,%
AdausuAl2O3,%
Ipurit.N2O,%
MgO,CaO,%
Temperat.ToC
Quarț-
SiO2,pur
0,998 0,002 ≥1710
Sticlâ
Vicori
0,96 0,03 0,01 ~700
Sticlâ
Pirecs
0,8 0,14 0,02 0,04 ~500
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(SiO2+im.(nâsip))+H2→(SiH4+imp.(silan subst.licidâ)) +O2 ↑+OH↑.
(SiO2+im.(nâsip))+HCl→(SiCl4+im.(subst.licidâ)) +O2 ↑+OH↑.
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SiCl4 ↑ + 2H2+O2 ↑ = SiO2 + 2H2 ↑ + 2Cl2 ↑
GeCl4 ↑ + 2H2 +O2 ↑ = GeO2 + 2H2 ↑ + 2Cl2
2POCl3 ↑ +3H2O ↑ = P2O5 +3H2 ↑ + 3Cl2 ↑
2BBr3 ↑ + 3H2O ↑ = B2O3 + 3H2 ↑ +3Br2 ↑
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VAD-Vapor Axial Depunerii)
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Modified Chemical Vapor Deposition technique (MCVD).
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Schema instalatiei cu o singurâ creuzete,
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Creşterea atenuării din cauza expunerii la hidrogen pentru SiO2 dopat
cu GeO2 (a), şi pentru SiO2 pur (b)
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Depunerea peliculelor de SiO2
compusialtiHCSiOHOCSi .422452
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22
224HSiOOSiH
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22
224HSiOOSiH
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Tipurile de FO
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LW Technology (Cover, Appendix).PPT - 26© Copyright 1999, Agilent Technologies
Revision 1.1March 20, 2016
Basic Step-Index (SI) Fiber Design
RefractiveIndex (n)
Diameter (r)
Cladding
Primary coating(e.g., soft plastic)
Core
1.4801.460
• Most common designs: 100/140 or 200/280 m• Plastic optical fiber (POF):0.1 - 3 mm , core 80 to 99%
140 m
100 m
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Fibre multimod Fibre monomod
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Revision 1.1March 20, 2016
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