ghep kenh theo buoc song
TRANSCRIPT
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Tm hi
Cc thnh vin trong nhm
Nguy nh 08520354
Ph 08520317
Nguy 08520517
Hong M 08520165 08520391
Gio vin
ThS. Ng Hn Chiu
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MM
THU
I: GI
I: S
II: Gi
III: Nguyn l ghp knh quang theo b
1: Gi
1.1: Truy
1.2: Truy
2: Cc tham s
I: Cc thi
1: Cc b
1.1. B
1.2: B ch l
1.3: Thi -DEMUX):
2: Thi tn s
2.2. Dng cch t
2.2.1. M
2.2.2. Cch t
2.2.3. i
2.2.4. Cch t
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II. CC THI
III. M
1. B cng ngh
1.1 Nguyn l chung
1.2. B
1.3. Thi
2. AWG v nh
QUANG WDM
I: S
1: Kh
2: Kho :
II: V
1:
2: Yu c
III: Xuyn nhi
IV: Suy hao Qu
V: Tn s B tn s
IV: phi tuy
1. Hi
2. Hi
3. Hi
4. Hi
5. Hi
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VII: B
2
3. Tch lu
I. Cng ngh
1. C
t
2.3: EDAF trong h
I: Phn c
II. Hai ki
1. M
2. M
1.
IV. Phn ph
2. Ch
V: B
1. B
2. B
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VI. WDM v SDH.
VII. M
VIII. V
IX. Thi
V. M
1. M
2. C
2.1. C
2.2. C
2.3: Quan h
3. C g.
4. So snh SHR/ADM v SHR/WDM
K
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THUVi t t t Ti ng Anh Ti ng Vi tADMAGANAOTF
APD
AWGM
ATM
ADPAWCDCADEMUXDSF
DXCDLEDWDM
FBGEDFA
FDMFFWF
GMPLS
GWIPISDNLANLCLCPLCG
Add/drop multiplexerAuxiliary GraphAcces NodeAcousto OpticTurnable FilterAvalanche Photodiode
Arrayed - WavelengthGrating MultiplexerAsynchronous Transfer Mode
Avalanche Photo DiodeAvailable WavelengthCoreDistinct Channel AssignmentDemultiplexerDispersion Shifted Fiber
Digital Cross ConnectDynamic Lightpath EstablishmentDifferential WavelengthDivision MultiplexerFibre GratingErbium doped fiber amplifer
Frequency Division MultiplexingFirst Fit Wavelength First
Generalized Multiple ProtocolLabel SwithchingGatewayInternet ProtocolIntegrated service digital networkLocal Area NetworkLogical ConnectionLeast Congested PathLogical Connection Graph
B ghp knh xen kD ng m th phNt truy nh pB l c thanh quang
u ch nht quang thc
B i quangd n sng ki u dn
c truy n khngng b
t quang thcc sng kh d ngng tr c
Gn knh ring bi tB gi i ghp knhS i d ch tn s c
N i cho sThi t l p lu ng quang
csng vi sai
i s i quangKhu i s i quangtr n erbiumGhp knh phn chia t n sThu c sngtheo th t c sng
Chuy n m ch nhgiao th c t ng qutC ngGiao th c internetM ng s lin k t d ch vM ng c c bK t n i logic
nh tuy ng ngh n t nh tng k t n i logc bi
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LF
LECLL
LSP
LSR
LU
M
MESHMPLSNP-
NZ-DSF
OADMOC
O/E/OOchOLAOXCOTDM
RWA
SDHSGC
SONETSNCP
STMSWRSOS
TAW
Largest First
Least Converter FirstLeast Loaded
Label Swithched Path
Label Swithching Router
Least Used
Max-Sum
MeshMulti Protocol Label SwithchingSubset of class NPproblem complete
Non-Zero Dispersion Shifted Fiber
Optical add/drop multiplexerOptical Circulator
Optical/Electrical/ OpticalOptical ChannelOptical Line AmplifierOptical Cross ConnectOptical Time Division Multiplex
Routing and WavelengthAssignmentSynchronous Digital HierarchySequential Graph Coloring
Synchronous Optical NetworkSub-Network ConnectionProtectionSynchronous Transport ModuleStatic Wavelength RoutingSpace Optical Switch
Total wavelength and Availablewavelength
Thu c sngt b c l n nh t
Chuy c sngtheo th t cao nh tThu csng d a trn t i t nh tLu ng chuy n m ch nhn
B nh tuy n chuy nm ch nhn
c sng d a trnc sng s d ng t nh t
Thu c sng d atrn t ng l n nh tD iChuy n m ch nhn th cT p h p con c a l p cc bi
c xem lkh gi iS i quang d ch chuy n tn s ckhc khngB ghp knh xen/r quangB u vng quang
n/ QuangKnh quangKhu ng quangN i cho quangGhp knh quang phn chiath i gian
nh tuy c sng
Phn c p s ng bth tu n t
M ng bB o v k t n i m ng con
Modun truy n t ng bB nh tuy c sng tChuy n m ch quang khnggianT c sng c a cc
c sng kh d ng
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TDM
ThrTSIWADM
WCWDMWGR
WPWRWRSOSCDFKDFFSMFDCFCBFGOAOADMOXCOMS-DP
OMS-SP
OMSRWA
SLEWCARCLRCA
RsvWRN
Time Division Multiplexing
Thr - Protecting ThresholdTime Slot InterchangerWavelength Add- Drop Multiplexer
Wavelegth ConverterWavelength Division MultiplexWaveguide Grating Router
Wavelength PathWavelength RouterWavelength Router SwitchOptical Supervision ChanelDispersion Shifted FiberDispersion Flattened FiberSingle Mode FiberDispersion Compensating FiberChirper Bargg Fiber GratingOptical AmplifierOptical Add Drop MultiplexerOptical Cross ConnectOptical Multiplexer Section
Dedicated ProtectionOptical Multiplexer SectionShared ProtectionOptical Multiplexer SectionRouting and WavelengthAssignmentStatic Lightpath EstablishmentWavelength conveter AwaveRelative Capacity LossRouting and Channel Assignment
Wavelength ReservationWavelength Router Network
Ghp knh phn chia theoth i gian
ng b o vi khe th i gianB nh c sng
B chuy c sngc sng
B nh tuy i quangd n sng
c sngB nh tuy c sng
nh tuy c sngKnh gim st quangS i d ch tn s cS i tn s c ph ngSS i b tn s cCch t BarggKhu i quangB xen tch quangK t n i cho quangB o v dng ring m n
ghp knh quangB o v dng chung m nghp knh quang
n ghp knh quangnh tuy c sng
Thi t l p lu ng quang tB chuy c sngT n th i
nh tuy n v gn knh
cM nh tuy c sng
L
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: GI
I: SCng ngh tr thnh nhn t
mthng d c ski gp ph
hthhnh h -t
1980 sgtht . Cc knh ny n
c hd
tch hdkinh t
phi th t hi chuy
h scc knh h n100%/mgi thnh c i h
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Cc giphn c
WDM. S i hqu
tuybnhgiquang khc. Mgi ki
xu
II: Gi
Ngay t bi t shi
ph dngy nay, t hau m
chnh th
th yd
- vicng ngh c nhxu chdB/km t cho th
t
vnh
d
Suy hao truy Khng b
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C tnh b S SChnh b c s
cc nh khai thc viv
ti to lc
M hnh chung c
Hnh 1.1: Cc thnh ph ng
Cc thnh phthu quang. Ph
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v
Phthnh. Ngoi cc thnh ph
quang (connector), cc mtuy
hao th
bs
cm hao s
nay ch
Ngu
Laser bn d ph htin quang, v
dngi
bi
t ph h
Tn hi s
hquang
t
thchuy
c
tr
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nh ng vc
Khi khob
thi t v thinhau. Thi
hipht quang th
th
Trong cc tuys mngupht vo s
squang. V
rnh
Hn
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III: Nguyn l ghp knh quang theo b
1: Gi
d r
cqu trnh bi
dm thnng cao t
chi ph cho cc gi t i hcng ngh kh
Hnhi
mring r r -9
dph
d ng phn c(SDH/SONET). Cc nh cung c s
cho vi s
Gbit/s v ti nh thh
1.1: TruyH
m d nh 1.3),
1 , 2 ,...., n thng qua b
knh t n m
tch knh quang tch cc tn hi
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hi ml gi
Hnh 1.3: S
1.2: Truy
H
1, 2, ..., n qua b
nhau truy n+1,
n+2,..., 2n(song cng).
Hnh 1.4: S
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Hri. H
i h huc suy hao nh
tch sng quang phknh c h quang th
cc bsng c
H haotruy
ho thnh ph
xuyn knh githchituy
b -xt cho c b
ho(MUX), cc b -DEMUX). Ccbcn lo -
H p/tch h -DEMUX).
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2: Cc tham s
Cc tham s
b
ghp/tch h c k hi i) v O( k
k( k) l tn hi
k, tn hi i( i) l tn hi
i
pht m chng, cho nn v
xt cc thng s
Suy hao xen:truy
bao gthn thi c di
b l
Li(MUX) = -10logii
i
I
O(1.1)
Li(DEMUX) = -10logi
ii
I
O(1.2)
V i l suy hao t i khi thi
dquang c
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Hnh 1.6. Xuyn knh
v - tch h
Suy hao xuyn knh: m t hisang knh khc. Cc m
n chung, ph -30dB) trong m
Trong m
i ilun lun tthi
Di( k) = -10log [Ui( k)/I( k)] (1.3)
i( kkhng mong mu k do c s ng ra ch
c tn hi i. Trong thi
ph
k) sinh ra Ui( kg
Ui( j). Khi cho ra cc s
v
: l dNvi ch c
nguho
knh ph
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c tquang v cng ngh
th
snguyn t Ngy nay, cng v
khng ngl v
v c ng truyl
v
Cc ph
nh 2.1:
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Hnh 2.1: Phn lo
nguyn l ccthi c
c
Cc bt
Thi
Thi
th
thimode, chng c nh
viv
I: Cc thi
Cc thi
khc nhau l: cc thi i
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ira t
1: Cc b
Trong thi -b
hnh 2.2.
Hnh 2.2. B
B-Perot,
g ch nhau chtrong su
Hnh 2.3. C
B 0
v 2 c n =1,35 ho 2 c n = 1,46 v v 2 c n = 2,2.
xn
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chm nh sngcong phn b nh 2.4:
Hnh 2.4. Phn bB c (hnh 2.5a l thng cao v
hnh 2.5b l thng th rung tm 0
(hnh 2.5c). T l hm truy
Hnh 2.5. Cc
Cc bc khoLor
thng gicong hm truy
ngu
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1.1. B
C
th h
1 v ph 2 s
Hnh 2.6. C
a) C
Cc thir
nm v 1300 nm, ho800 nm v 830 nm; 800 nm v 890 nm; 1200 nm v 1300 nm; ho
nm vv..., v25dB.
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1.2: B
Thi m
sng v ph
Hnh 2.7. C
Trong ths
Hnh 2.8 l b ng dng thsu
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Hnh 2.8. M
tthoa
Hnh 2.9. C
tr
1.3:Thi -DEMUX):
Hnh 2.10 th - m
v 0,89 m t
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qua s m v 1,3 m t
tia
vo dng lo
Hnh 2.10. Thi -
BPF - B
LWPF - B
SWPF - B
c m; 2,6 dB
m khi dng Laser diode v 5,2 dB
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0,81 m khi dng LED. Suy hao xuyn m b -
sng ng -3,9 dB.
M - nh 2.11.
Hnh 2.11. Thi -
C
sng 0,825 m t m t
chung vo v t m tv t
0,82
5 m
0,87
0 m
1,3
m
Suy hao xen (dB) 0,4 0,75 1,3
Suy hao xuyn m -0,6
-40
Suy hao xuyn m -78
-120
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2: Thi
Thi
nhid
2
t
sng t g khc nhau
sng).
ir
Adn
d
di
cos/cos
sin(2.1)
V
i l gc t
i l gc l
A
n l chi
Hnh 2.12. Tn s
1
2
d
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nghgc.
2.2. Dng cch t
2.2.1. M
Cch t
ctrn cch ttn x
ng cch rnh (g
Hnh 2.13: S
C
s i
sng t
1, 2,....., n
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2.2.2. Cch t
Hnh 2.14. Cch t
TronN -
M -- gc t
- gc nhi
i - gc ti - gc nhid - chu k cch t
- gc nghing c
T
tki
0 = d(sin + sin ) = k (2.2)
V k - s
-
d - chu k cch tk = 0k = 1
N
nd(sin + sin ) = k (2.3)
C
i = -
i = -
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Theo quy t
= ( + )/2 (2.4)
Cng th
kd2
cos2
sin2''
(2.5)
Haykd
2cossin2
'
(2.5)
= ).
1 = 2dsin (2.6)
Khi
1 = 2dsin cos2
'
(2.7)
2 = 2dsin (2.8)
n =n
d2sin (2.9)
A ='
'
sinsin/sin
sinsin/sin
iid
iidA
n(2.10)
Khi = n th c
2
nn AI (2.11)Phn b
2
/
/sin
n
n
nk
nk
I
I
n
(2.12)
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T im nh 2.15 a). Trong tr
v c d nh 2.15 b).
Hnh 1.16. Phn b nhi
2.2.3.Ni chung, cc b
chnh: cc ph
thu - pht); ph ; ph
Hnh 2.17. S
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Hnh 2.17 l c
t thhi
Hnh 2.18. B
knh GRIN-rod c
Trn hnh 2.19, khlm c tch dthnh mphthu truyv quang sai rg
Squang: t c th nguvknh ghp th c thb
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Hnh 2.19. B ng ch
2.2.4. Cch t
Hnh 2.20. Cch t
Cch t hing c
rnh cch tth gc nghing c
h
M g dny c v khng s
thdi i khng
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Hnh 2.21. S
Tm lnh 2.19
n ng ch c th2.2.5. Cch t
Cch th
chiphase. Hi cho php thaydi cch tnhikh hon thi
ch thi
d
bhoch
thnh ph
sng nglm dn ph
c nhicch ny thtuy
ng cch t
cu b
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cch tm
v
Hnh 2.22. Nguyn l cch t
Suy hao cv cc ch cphtm). Ngoi ra, suy hao ny cdB/nm. Th ragg sov
B
Cch b tn
s
Suy hao
c
Suy
hao thng
Suy hao
c
Skm
4,4 dB 4,8 dB 6,2 dB
Skm
6,0 dB 6,5 dB 6,7 dB
S
km
7,7 dB 8,3 dB 8,9 dB
S
Bragg b tn s
2,0 dB 2,5 dB 3,0 dB
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V t my tnh,
chng s
II. CC THI
Cc thi c th
trn nguyn l: khi li cc schuy cc s
nhau n
s
A = aWdeWKV
U /21
3
22/1 1
Wad2 (2.13)
A - bn knh li
d - khon1 - hn2 - hK1 - hm Bessel b
- thnh ph n.
= 1 - n2/n1 - h
V = (2 a/ )(n12 - n2
2)1/2 - t
U = a[(2 n1/ )2 - 2]1/2 - h
W = a[2
- (2 n2/ )2
]1/2
-T nh : h
s gi m), v khi
t
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Cng su 2(A0L) v cng sucos2(A0 0 l h
su 2 A(z)dz v cng sucos2 A(z)dz.
Cc thi nh 2.23,chbng, m
xo
li chung.
Khi hai s hikho
=/
2/
0LA(2.14)
(A0L)/
cch hi
Khi hai s ghp khc nhau th hi :
=
d
d
d
dL 21
5(2.15)
1/d v d 2 /d theo mode c
Hnh 2.24. Hai ph
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s nh sin lm hvi R rng r
n r
Hnh 2.25.
v
Trong cyu c
thi nh 2.25.
Khi cr 1 =
1320nm, 2 = 1280nm, 3 = 1240nm v 4 = 1200nm.
Hnh 2.26. B
mode
php ghp nng ch
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g php nng chk
Cc thim
h
III. M
1. B
1.1 Nguyn l chung
Ch u,
khc thng qua thi
phthvc
coupler honh
Trong ms
quang, cc d n hithnh n = 2 s
gi
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Hnh 2.27. B
Nguyn l ny chi ph cho cc m
coupler hom
Trn m khc nhau c th
ph
knh ho
1.2. B
Hnh 2.28 l bs
Hnh 2.28. B
S v j l s
i j
th vi
d(sin i + sin j) = i j (2.16)d - chu k
N i+1 = sin i + u, v
h
Sin j = sin i + (j - i)u (2.17)
V d[2sin i + (j - i)u]] = i j (2.18)
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C th i j
Hnh 2.29. Ma tr r m
1.3. Thi .
Vv nP/(n+1) nh
suy hao phs
-1, P-2, P+1-n (P l ss
V -1,... , i+j = P+2-n.
- -n v
con-2n-1 v l
Ti
BCho P = 9, n = 2. Tm m
hnh v
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Hnh 2.30. Ma tr
Vo s
V
Vo s -sng trn m
Vo s -2n-1 = 4 v tm
K nh 2.31:
Hnh 2.31 K
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BCho P = 8, n = 3.
Ma tr nh 2.32:
Hnh 2.32. Ma tr
Vo s
V
Vo s -, 4.
K nh 2.33.
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Hnh 2.33 K
2. AWG v nh
Nhn l
cng ngh ttch /ghp knh s
l 80, trong phng th nghi ti
tuy gi
Hnh 2.34. Cc b
M
l cng ngh tIC, thquang. Vi m
bn d
nhau thnh m ng hon ch
Hnh 2.34 ch
m cl
d li
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(core) c chi co co nh clm
b
hnh hcladding khc s
ny c hi clph (l h
quang kh do s
quang kh
Hnh 2.35: C
T
nhi ng khc nhau. Cc chth
suy gino c (Dynamic Dispersion
Compensator).
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Hnh 2.36: Cc ph
Hnh 2.37: C
Tn hi
knh lens region (2), cc th y th
grating array c sai l L so vln c aveguide spha khc nhau t
L2 (2.19)
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mitn hi quang t
waveguide s thuy
(photolithography) v cng ngh
Cc sgi
khn xcc b
hi
TH
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BKhi tri m
S
V
V
V
Qu
EDFA v m g m
ng thgi
I: SM
knh v sph
1: Khth
Kh
2: Kho cc knh, m
T
Qu
Kh
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M ng 100 nm
(theo khuy -T th d
ny lm cc h
khc h
t
Kho t
b
s
S
trong s
N l kho
f = 2c (3.1)
= 1550 nm, v
ta s f = 4,37.1012 Hz = 4370 GHz. Gi
h f/5 = 874 knh trong d
c
i h
ph
ngu
k
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T
th
khc nhau, c -
(x
t
knh l 50 GHz, song cc s -T
nu). D 50 GHz v 100
GHz lm kho
nm.
B
S
t
T
50GHz (THz)
T
100 GHz (THz) (nm)
1 195,40 195,40 1534,25
2 195,35 - 1534,64
3 195,30 195,30 1535,04
4 195,25 - 1535,43
5 195,20 195,20 1535,82
6 195,15 - 1536,22
7 195,10 195,10 1536,618 195,05 - 1537,00
9 195,00 195,00 1537,40
10 194,95 - 1537,79
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11 194,90 194,90 1538,19
12 194,85 - 1538,5813 194,80 194,80 1538,98
14 194,75 - 1539,37
15 194,70 194,70 1539,77
16 194,65 - 1540,16
17 194,60 194,60 1540,56
18 194,55 - 1540,95
19 194,50 194,50 1541,35
20 194,45 - 1541,75
21 194,40 194,40 1542,14
22 194,35 - 1542,54
23 194,30 194,30 1542,94
24 194,25 - 1543,33
25 194,20 194,20 1543,73
26 194,15 - 1543,93
27 194,10 194,10 1544,53
28 194,05 - 1544,92
29 194,00 194,00 1545,32
30 193,95 - 1545,72
31 193,90 193,90 1546,12
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32 193,85 - 1546,52
33 193,80 193,80 1546,9234 193,75 - 1547,32
35 193,70 193,70 1547,72
36 193,65 - 1548,11
37 193,60 193,60 1548,51
38 193,55 - 1548,91
39 193,50 193,50 1549,32
40 193,45 - 1549,72
41 193,40 193,40 1550,12
42 193,35 - 1550,52
43 193,30 193,30 1550,92
44 193,25 - 1551,32
45 193,20 193,20 1551,72
46 193,15 - 1552,12
47 193,10 193,10 1552,52
48 193,05 - 1552,93
49 193,00 193,00 1553,33
50 192,95 - 1553,73
51 192,90 192,90 1554,13
52 192,85 - 1554,54
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53 192,80 192,80 1554,94
54 192,75 - 1555,3455 192,70 192,70 1555,75
56 192,65 - 1556,15
57 192,60 192,60 1556,55
58 192,55 - 1556,96
59 192,50 192,50 1557,36
60 192,45 - 1557,77
61 192,40 192,40 1558,17
62 192,35 - 1558,58
63 192,30 192,30 1558,98
64 192,25 - 1559,39
65 192,20 192,20 1559,79
Trong m
khi
tr
ngh
b
b g pha tr
M
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B
Th T n s
1 192 1560,61 *
2 192 1559,79
3 192 1558,98 *
4 192 1558,17
5 192 1557,36 *
6 192 1556,55
7 192 1555,75 *
8 192 1554,94
9 192 1554,13 *
10 193 1553,33
11 193 1552,52 *
12 193 1551,72
13 193 1550,92 *
14 193 1550,12
15 193 1549,32 *
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16 193 1548,51
c d
II: V
1: ngu
Trong hngu
khng
ngu : th
c
khi
thng qua vi
s
kch quang, hnh thnh k
2: Yu c
Vi h
cc knh ln c
l a s
ra khi ghp l kho
trnh ch
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r
phi tuy
C th
knh khi kho
gi hi
s
hi l h
quang, ta c: = B.D. .
T = /B.D. V
(b
III: Xuyn nhi
Xuyn nhi
chnh v v
hai lo
- Xuyn nhi
m
c
- Xuyn nhi
(s
IV: Suy hao Qu
Trong b
hi
php. Gi pht pht tn hi ph nh
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quang th y
nhi
cng su thu min) cho php th thng tin truy
cng su
cng su
Pmy pht = Ppht + Pd
Pthu min < P pht - Pt < Pthu max
truy h
b
hi
hi
cho vi
Vi
tuy n lm gi suy hao xen c
thi
s
u
v nguyn l lm vi
V: Tn s B tn s
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Sau khi s
truy
ph
tin t
quang l
cng th
ch c
cn 58 km.
B
T 1550 nm(G.652) 1550 nm(G.655) 1310 nm(G.652)
2,5 Gbit/s 928 km 4528 km 6400 km
10 Gbit/s 58 km 283 km 400 km
20 Gbit/s 14,5 km 70 km 100 km
40 Gbit/s 3,6 km 18 km 25 km
B
Tn s
- Tn s c
s cc mode trong s
truy
- Tn s gy
ra tn s nhm c
cho nn cc thnh ph cho s
khc nhau, ph liu l m
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bn trong mode, v l y
d
- Tn s
trong li, cn 20% n
truy ( l hm c
a/ , v
h
S
B tn s
S
B tn s
Vic
ph
C m
hn c
Tn s
b
hi h thnh hai mode phn c
giao c v
gian truy
(Differential Group Delay). Tn s r
nn suy gi
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mode phn c
nh trong
khng
cc thnh ph
thi phn c
chi
mode, hi
cn sinh ra do s
trc s
ph
IV: uy
r l
tr
Hi
g
Tn x
Tn x
Do t khc x
T
Tr
Nh
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1. Hi
Hi
chuy
g v
sng m
sng b
ph
N s(L) l cng su
Ps(L) = P0exp(grP0L/(K.Seff)) (3.2)
P0 l cng su
gr l h an
Seff l di
phn c 2.
L l chi
Cng th 0 m t
0
th (P0
th l cng su
tn hi
P0th
r
eff
Lg
S32(3.3)
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Qua tnh ton cho th
th g
WDM th m
gi chuy
s
0,5 dB th m
fLNNxP
eff11028,10
2
(3.4)
V
N l t
l kho
ng ny lm h
cch gi
n
nhi
2. Hi rillouin Scattering):
Hi
v b
g n xtrong hi
hi
ph )
m
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knh cng truy
knh.
Trong t
l th nh
fB/ fLaser ( fB fLaser
- 100 MHz) nn hi
c Ch
hi
Pth = 21B
PB
eff
eff
v
vv
gL
KA(3.5)
g l h
Aeff l vng li hi
fP
cch gi c vo s
c
3. Hi
SPM l hi
c
d
n = n0 + nNL = n0 + n2 2E (3.6)
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n0
l chi
n2 l h 2 = 1,22.10-22
Hi y ra s NL c
trong s
cch L, pha c
NLconstnnLnL 220 E22 (3.7)
, hi
NL s
gian. S ng xung tn hi
nhi 0 m vNL, v
vNL = (-1/2 )( vNL / t) (3.8)
Hi
xung d 0 xung d 0
c ngh b
gi
xuyn nhi
N c
(tn s
s
V 0) s
s 0 xung b
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tn hi i, j, k
t ijk.
photon
b ijk(L) l cng su sng ijk trong s
quang, th:
LPPPS
L
cnLP kji
effijk
ijk exp.61024
2
223
220
6
(3.10)
l hi
c l t
Seff l di
Pi, Pj, Pk l cng su i, j, k
(3)
Hi c
pha r x
c kho
Do vi
su
kho
vo cc knh tn hi
th
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S
Cc h
s
cn tn s nh
th
(Dispersion Shifted Fiber).
ho
h
V n cng ngh
tm
nh
cng su
khng l
quang v cng ngh
c
n
chhi
quang G.652; t
l
VII: B
-
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EDFA (Ebrium Doped Fiber Amplifier) l b
quang c pha tr3+; ngoi ra cn c cc b
v lm cho cng ngh
nghi u s
sng c t , m t
trng theo s
nh
dng b c
nng ln.
Tuy nhin khi s m
Hi
ton l t
hi
khul
yu c khu
cng su
v m
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g ph v
N
cng su ch
khu
t
cc b
ch
N
ho ph
knh cn l
su thu
max) th thng tin s c ch
i h
su h
kh
khi
h
su
V i s ln t
knh) th s
cc knh s
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.., v lun c
ph
khc nhau nn, thay v ch h
s nay, v
b t
b
Th
photon c
hi l kh,
g truy
R rng l
t
ph
sng khng b
mc v
Ni cch khc t
nh rong h
WDM s
ph
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ph o
thc
s
1532 nm, m t p m cao (t
th
3. Tch lu
H
vo/t
c
s
Nhi
t rong cc b
EDFA lin ti
s
ny s
qu th
Tuy nhin, n
c th ho
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V: CNG NGH
I. Cng ngh1. C
C nh v nh ph
ch
m
k hi - - 20m. Ngoi
ra EDFA c
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Hnh 3.2 C
Bi 3+
thi khng b
quang h
c h
xu
b
chen vo) hay kch thch (do s
thch s
sng). Trong qu tr
photon t
t
l nhi
t
b h
thch.
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Hnh 3.3 Gi
Hnh 3.4 so snh
trong truyd
ngh
vo kho
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Hnh 3.4 Ph
Ngu
sng 980nm v 1480nm. Khi s
nh
nui ln h
tr n
hi chng c
chng c
s
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H
Nhi cho kcng su
hi
Cng suHnh 3.5. H Al-Ge pha t
Trong s
M
theo li s
T
- T
- T
- T
- T p m phch gi
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Trong 4 t
t
Ng oton t
tch quang khng gi
qua ti -N c
ng cc ngu
b
Ngu
G m(0), Nm(L) l m
s .
M
Nm(L) = GNm(0) + nsp(G - 1)
Trong v
khu
nhi b
tnh s
thng xung quang t
PASE= nsp(G-1)h
nh l ph nh c
khu
M bi ASE nh c
mt
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Nhi
Trong cc h
hi i
bi
s
ng
t
D
Thnh ph
pht v - t - sp). Thnh
hv
eEEEEEEI spontsigspontsigspontsig
rrrrrr
**22
spontsigtot EEErrr
-
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ph
g n hi - t - sp). D
phCh :
c
Tnh t
Trong b
V in, SRNout: T
khu
T
nh sp spkhu
V
tn hi
v n, b
s
sp
s
esp
spIG
eBnG
IG
BBeGn
GG
GnNF
2
0
2
02 )1(2)2(111
2
-
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hi
gi
2.3: EDAF trong h
d
cng nghkhu
d
+ Ph
+ S
+ EDFA ph
cc knh.
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-
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LAN (Local Area Network), l mM rk) l m
vng Ring. M
ng v vtuy
OADM (Optical Add Drop Multiplexer). Ph
mI: Phn c
N
c th
sng th k ng phn c
Trong mLAN s
ph2 l mc nh 5.1). Trong
giao nhau c th ng m
thng itn hic
2 v c chuy
Cc c
d mth
nhi p trung, ph
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vng. Mdng k
Hnh 5.1. C
m
cki
thu bao, do ph
ngh
tuyth ph
Ngoi ra s sng, v
dng struy s
thi
nghh
su
-
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II. Hai ki
M
- Switching) v chuy - Switching). T nh thnh 2 hnhth -
Switched WDM Network) v m -SwitchedWDM Network).
1. M
Hi M chuy
n c
xy dXt t
l m lsng d
- M
Trong mquang v b
khc nhau. Tn hil
ntc tnhsng thu gi
ti
V b
nn lo
hiv u
- M
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Trong md
ginhi
2. M
Cnh
bi x
tt
M
Khi ch yc
bi ng rra, b
Khi 2 ts trn dy ra, v
cng mquybo quang do giao di quang v dy tr
s -1)T (vbo quang cng tranh chbo quang c th tin tlm cho m
gi
v
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Mc
III. WDM
Vcu
y - Optical- Optical Add/Drop
MultOXC v OADM).
1.
Ch
thi thvi
thng tin t nhi
d
l c c
trctr ng then chtuy
c y
cM
- Cng ngh -- Cng ngh- Quang nhi -optic)- Quang nhi c (silica thermo-optic)
-
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- Cng nghcircuits anh thermo inkjet).
M
cng ngh a m
c
Hnh 5.3. OXC v N
Ma tr N l m
ntrn s l mtuyRing....
XC c5.4 minh ho N v
M l sl dule chuy N.
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Hnh 5.4: C
Hnh 5.5. V d
s
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2.
Ch (Add
Drop Multiplexer) trong mquang. ADM s
lu ho
nhphp cn lcc nt OADM, d c
nh 5.6).Trong m
ghp m khng c
Nh
thso v
m nt OADM thi
vo nhu c
Hhnh chung c
th(Disperation Equalizier Module); cc thi l
Performance Monitor). Md
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Hnh 5.6: S ng 1 nt OADM
Thi nh 5.6 c th c
chuy
m trnh chuy chuy
hi truy
s
nhcao nh
Cc k
mAWG, ho
V100 GHz v l n vth
thng. Cc b
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c khoModule OPM (Optical Performance Moniter) c nhi
ho
mtrn cho ph h
c chnh v v
IV. Phn ph
Cng ngh v
quang, vd
hiquy ho
thchuyhi thng tin cao ttnh kh
1.
C th lphng m
chuy thng tin do nguyn
v
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Tuth
sng khc nhau ph
l nc chung m
sng, gi nh 6.3. bi -1-6-7-C t
1 m D-10-9-E c th
2 (c th
Trong m
bich
l sau khi n r
mmsng) m
OXC c thknh quang no c
-
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Hnh 5.9. Knh b
2. Ch ng m
Hnh 5.10 l k
hnh v c th
dng cng m A, C D, trong hnh v
3.5.10. bi cm
Vbchuy m
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knh, m
phn ph ng quang gc
dng trong mth .
V: B
1. B
V
bki th
hom
vt
khi dc th
n btch/ghp knh, bph
tc v h rth
Trong mchuy c l Tx1 trong hchuy
thgiao, th ph trong 50ms.
- B
-
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-
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WDM snhi
Theo s mti
xuvo chia gi v d
tr- 16, thi
thSDH s ti
khng lVII. M
Trong mdi i
xbi ngh
quan tr hnh m
thnh chl ph
pht tridi c hitruy
nh ngh
ngh
b ungh
lai l m pht hi n
thisu
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su
VIII. V
Hch quang r rng khng ph
vchx n nay, sWDM khng ph -
sng tn hituy r r
tcch gi
nghim trnhin d
quy
c
IX. Thi
Kbi
Trong qu trnh tNh
WDM v k nhtrn.
thic xt t
xy d ng mv
lgic tr
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C 2 kithnh m d
b
mg
(k
xt khng chs
Khi thih
truysquan trc
tiu tquan tr
Khi thi(RAW). RAW l v
lm thho t bti nguyn c h
Vtm s
Vyu c t
bi
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V. M
1. M
Mtn hi (STM-1), ho -4), hoGbit/s (STM-16). Cc nt trong mnhnh PDH ho
l phtrong 4 bit cu
m
Mum
trc c ghp quan h
t
2. C
2.1. C
Hnh 5.16 th
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Hnh 5.16. M
c chuyc
ny l 12.
2.2. C
Hnh 5.17 th
2 b
quang ho 2 (OS); 3 coupler tchquang; 2 b
-
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Hnh 5.17. C
Cc lu PDH t
ghp thnh t -N; qua b(E/O); qua bs n
truy
dlb (O/E). Tn hi
-N thnh tt
c
B
php. B -s
cu
-
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2.3: Quan hT trnh by trn
s
bi
m = M(M-1) (5.1)
s
sng ghp ho
m = 2(M-1) (5.2)
Mu
truy
3. C
Trong cv hai s
ab truy ba truy
gn bd n
db n
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Hnh 5.18. C
Trong c
c trong hnh vc
M
m = M(M-1)/2 (5.3)
Hic
v kho
phv khot - - c
-
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mtrong t
ch
4. So snh SHR/ADM v SHR/WDMB g 5.1 th
SHR/WDM
Danh m SHR/ADM SHR/WDM
Kh
hi
STM-1 Knh quang truy
qua s
S t nhi
T th cao
Nng c d
Y
trong m ADM
s
c thChuy
vqua
c khng c
Tr l nh
Stch/ghp tn hi -1 hotithi SHR/WDM c ch
v i n 2,5 Gbit/s (n l strong SHR/WDM) chnh ngay trn s
d
H
trong SHR/ADM. Tr
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ngkhi tch t
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K
Truy
s t m chng lo
th l khi m nhu c
Khi nng c
vi h
phITU- ban hnh chu tr
cch ghp gi gi
Cng ngh mquang ni chung v cho thng tin WDM ni ring, gi
qu
vo cc thi lm cho hm
V m hingh
r
thm c th , cng ngh
Tuy -Namnnghin c - tri tr -Nam
bmu
mn c
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Ti liK nguyn l ckhoa h
H9
M n m