. , .
- 820-900 ;
- 1280-1350 ;
- 1528-1561 .
( , )
. , . . , - , , ( -). .
, .
, |
l , ; CPP , CPP =0,70,9 4×/.
1,7 1,8 - , SiO2. :
, |
k , =0,9 /, k=0,8 .
. , OH- 1383; 1240; 1130; 950; 875; 825 725 . .
, 0,15 / 1550 . - - , .
(backhaul) , () . , , , , .
, .
, . , .
|
|
. - , .
-
1260 -1675 . , .
, | ||
O | (original) | 12601360 |
E | (expanded) | 13601460 |
S | (short) | 14601530 |
C | (conventional) | 15301565 |
L | (long) | 15651625 |
U | - (ultra-long) | 16251675 |
O, C L, EDFA (erbium doped fiber amplifier). (CWDM) (DWDM) , E, S U ( . ).
(WDM)
/ WDM -, () , . , , " " /, (b / c). / - .
,
,
. . , .
- , . , 30 3000 , ().
, , , .
. ( ) , .
() :
|
|
- () "-";
- ;
- " " "-".
(.):
- ;
- ;
- .
:
) ; - ;
:
-
- ; ε - μ - . μ ≈ ε ≈1, , .. ≈ 3 ∙108 /.
, , . , . f = 1/T,
λ f
: , , , - .
10...100 | () | 3...30 | |
() | 1... 10 | () | 30...300 |
() | 100... 1000 | () | 300...3000 |
(KB) | 10... 100 | () | 3...30 |
() | 1...10 | () | 30...300 |
() | 10... 100 | () | 300...3000 |
1... 10 | () | 3...30 | |
1... 10 | () | 30...300 | |
0,1... 1 | () | 300...3000 |
(, ), , .
. .