???????????????????????????????(OH-)??????????????,??

1
??? ????????

• 3.1 ???????
• 3.2 ???????
• 3.4 ?????????

2

• ????
• ????????????????
• ?????????????????????
• ???????????

3
????????,???????????,?????????????????????????
?????????????????????????????????
4
3.1 ???????
????????,?????????,??????????,???????????,??
?????(???)? ?????????????????????????????????
?????????????
5

• 3.1.1 ????
• ???????????????????????????????(OH-)?????????
  ?????,??
• ??????
• ??????
• ????????

6

• 1. ??????
• ??????????????????????????
• (1) ??????
• ?????????????????????????????????????,??????
  ???????,????????????0.16?m,???????????,??????1dB/k
  m,?????0.05 dB/km?

7

• (2) ??????
• ?????????????????????????,????????????,??????,
  ???????? Si-O?????,??????9.1?12.5?21
  ?m,?????1.51.7 ?m,????????????

8

• 2. ??????
• ?????????????????,??????????????OH-?
• OH???? O-H?????????2.73
  ?m,?Si-O??????????,?????????????????,???????1.39?1
  .24?0.95 ?m,?????????????????????
• ???????????????????????(0.51.1
  ?m),????????10-9,????????

???? (1)?????????????????,??????99.9999999??? (2
)???????,??????????(???????)
9

• 3. ????????
• ???????????,??????????????????????????????????,
  ??????????????????,??????,????,?????????630nm???

1 rad(Si) 0.01 J/kg
10
????????
?GeO2??????OH??????
????????????????
OH-
0.154 dB/km
11

• 3.1.2 ????

??????????????,?????????,???????????,????,???
?,????????,??????????????????????????????,????????
,??????????? ???????????????????????,????????
???,?????,?????????????,??????,???????????
12

• 1. ??????
• ????????????????,???????????????????,????????
  ??,????????????????,???????????????????????????,??
  ?????????

13

• (1) ????
• ??????????????????????????????????
  ???????????????,?????????????????????,????????????
  ???????????
• ??????????????,?????????,???????????(???
  ???????????),??????--?????????4?????1.55
  ?m??,???????????0.120.16 dB/km,???????????????,??
  ??????????,???????????(3 ?m??0.01
  dB/km),?????????????(????)????????????????????????
  ?-??????

14

• (2) ??????
• ????????,?????????????????,????????????,????
  ????????????????????????????????????
• ??????????(???????)??????????????,????????
  ????,????????(??????),?????????,??????????lt1,????
  ???lt0.03 dB/km,?????

15

• 2. ???????
• ????????????(gt???),????gt2.5Gb/s,??????????
• ????????????,??????????????(????)?????????
  ?????????????,??????????????????

16
?????? ???????????????????????
stimulated Raman scattering
?????1???2???????h ? v,????v????????????,?????
1???????????????????????,????????????2?,?????????v
sv- ? v?????,?vs???????????????????
2????????????,????????????1?,????????vav ?
v?????,?va???????????????????????,????????????,???
?????????????????,????????????????????????????????
?????,??????????,?????????????????????????????????
??????????,??????????????????????????????????,????
??????????????????????????,???????????,???????????
?
17
??????? ??????? phonon scattering
???????????????????,?????????????????????,??????
??????????????????????????????????????????????????
????????????????????????????????????????????????

18

• 3.1.3 ????
• ?????????????????????????????,?????????????
  ??????????????,?????????????

19

• ?????????????????,??????????????????????????
  ??????????????,??????????

???
???
Cladding
q
lt
q
Core
q
q
q
q
gt
q
q
c
R
???????????????,????????????????
20

• ????????????????????????,????????????????????
  ????,??????????,??????????????????????????????????
  ?????

21
????
????? ?????????????? ????????? ????????
???????????? ????? ????????
??????????????????????
22
?????????????
l??,V??
23

• 3.1.4 ??????
• ???????????????,????????(???????)???,???????(
  1km)???????????????,???a??????,???dB/km??????????

24

• ??L?????,?km???P1?P2??????????????,?mW?µW??
  ??

25
??????????????,???1310nm?1550nm??,?????1310nm
???1550nm??1550nm???????C-band(1525nm1562nm)?L-b
and(1565nm1610nm)??????????1550 nm??????0.2
dB/km??????
26
???????
???????(1)??? ?????
(2)???? EDFA??????
27

• ?3.2 ????30km????,???1300nm?????0.8db/km,?????????
  ???200?W????,??????Pout.

28
3.2 ???????

• 3.2.1 ?????

????????????????????????????????????????(??)??
?????(????????)????????n??,??????????????????,????
????????????
29
??????
30
??????????????????????,???????????????????,???
??????,????????,????????????????,?????,???????????
????????????????
????????????
????
??????????????(??????) ????????????? ??????????
???? ????????????????
31
t1
t2
t3
t4
???????????????????,?????????,???????????????
32
??????
???????????/????? ????????????????????????L,??
??w?????? ?????????Dw???,????????????????
?????(GVD)(ps2/km)
33
????????Dl??????w?l????? ??DT?,?????? ??D(
l)?????? (????????)

ps/(kmnm)
34

• 3.2.2 ????
• ???????????????????,??????,?????????????????
  ???,??????
• ??????,?????????,??????????????????????????
  ????

35

• 1. ???????????
• ???????,?????????????????????????????????c??????,
  ??3.6?????,????????????????????????????

36
?3.6 ??????????
DL??????????
37

• 2. ???????????
• ???????????????????,????????????????,????????
  ??????????

38

• 3.2.3 ????
• ?????????(???)??????????,??????,??????????
  ????????????????????????,??????????????????,??????
  ????????
• ?????,??????????????????????,????????????
  ????????????????????????

39

• ????????????n(l),???????????b??
• ???????L???l???????(????)?
• ????????????,???????????????????????L???????
  ??Dm????????

????????????????,??????????
40

• 3.2.4 ????
• ???????80??????????,20??????????????????????
  ???????????????????

41
????????????????,??????D
(n1-n2)/n1???,????b???? ???????L???l????????
??V?????????????????????????
????????????,???????????????????????L?????????
Dw(?)???????
42
???????????
??n2 1.48,D 0.2, ????????V
2.4?,? ???????1320 nm?, ?????
2.4
43
????????????
????????????????? Dm gt Dw
??????????????,???a,??????????????,??????????????
??????????????????????????????????
44

• 3.2.5 ?????(????)

?????(PMD)????????????????????????????????????????
??????
?????
45
??????????
??????? ???????? ?????????

• ?????
• ????????
• ??????????

EDFA ,FBG ,DCF Isolators , Couplers ,
Filters etc.
46
????? (PMD)
PMD ???(??????????)??????,??? ?????????????????,PM
D?????? ??,??????????????
47
PMD ??????
48

• PMD??
• ?????????????(Differential Group
  Delay)???????????
• ?????????????????????,?????????????,???????
• ??????,PMD???????????????????????????????????,??
  ??????????????????????,??????????????????

49

• PMD????
• ??????,????(DGD)????????
• ?????????????PMD?
• ????????( Mean Differential Group Delay)
  (ps)
• ??????????
• ???????? (RMS DGD ,??1.08 )
• ??????????????????????????

50
PMD?????????
??????????????????PMD??????????1dB??,????????
????????????????????(10ps for a 10Gb/s system) ?
?????????,?????????????!
51

• 3.2.6?????
• ???????
• tM????,tm????,tW?????
• ?????????????D,????????????????????

52
????????
1300nm?????
??????
??????
53

• 3.2.7 ????????????????
• ????????????????????????????????????,???????????
  ?????????????????????????????,????????????,??????
  ????????,???????????????,????????,??3.12???

54
?3.12 ?????(f???????)
55

• ??????????????,???????(?3dB)????(fc)???,????????(
  B)??????????3dB?????,????3dB???????????

56

• ???????????????,????????????????????,??
• ????????,3dB??????6dB????

57

• 1. ????????
• ???????????????????????,?????????????????
• 2. ?????????????
• ?????????????????????,?????????????

58

• ??BM???????????????Bc?????????????????????

59

• ?????????
• ????????????,???nmL??????,???kmD(?)???????????
  ????(???????),???ps/(nmkm),????????????

60

• 3. ?????????????
• ????????????????????????????????????????????????B
  T????????B?????
• BTBL-?
• ??L????????(km),????????,????????????????????,??
  ?0.51.0??(?????0.50.9,?????1)?

61
3.3 ?????????
????????????????????
?? ?? ???
????,??
??
62
???????????,??????

• ????

• ?????

• ?????

???
DWDM??
?????
????
???????????????????????????
63
G.653 ?????? ???????????1550 nm
????????,???? ??????????? ???,??????? ??????
??????
??????
64
G.656 ??????
???????????????,?????????
??????
??????
65
?????? (DCF)
????????????????
?????(1) ???(2) ??????(3) ????? ????????
66
????
?????????
???????
67
??????
??LEAF??
Corning Leaf Index Profile
LEAF Large Effective Area Fiber
68
???????
Sumitomo Pure Guide Index Profile
69
??????
Lucent Truewave Index Profile
70
?????????
71
ITU-T???????????
72
?????
73
?????????
74
?? 3.1-3.4