11.
11.1 , .
11.2 , .
, .
, .
. , . AON (All-optical Networks).
AON (All-optical Networks) , , , (), .
, , . , ( , WDM, EDFA, ), , . , , : Lucent Technologies, Alcatel, Ericsson, Fujitsu, Hewlett Packard, NEC, NTT, Nortel, Siemens.
, AON, , 1 , 0 . , EDFA . , AON.
. . ( ), . 20 100 , 1 5 0,1 . 10 , 1 . pin- InGaAsP, 1300 100 /, (DFB), 1550 10 /.
|
|
. : ( , standard fiber, SF), (dispersion shifted fiber, DSF), (non-zero dispersion shifted fiber, NZDSF), 50/125 62,5/125. - . NZDSF, DSF. 2 . , , , . , , .
. - , FDDI, Fast Ethernet ( 100 /, 125 ), (STM-1 155/, 194 ), STM-4 622 / ( 778 ) Gigabit Ethernet (1000 /, 1250 ), , STM-16 (2,5 /), , , STM-64 (10 /).
/. , WDM, , / (DWDM) 40 . , . , .
. EDFA, 980 1480 . 1535 1560 , 30-38 . EDFA , WDM , .
, , . 22 44, 88 1616.
|
|
, . , , () . , , . .
. , 1 , 2, 1 2 2 , .
DWDM ( WDM) :
1550 , EDFA (1530-1560 );
, (3,2 / 1,6 / 0,8 0,4 ). , DWDM ( 32- ), DWDM, () , , WDM / , . / o , , . - , DWDM WDM ( 1310 , 1550 1650 ). ( ) () DWDM . DWDM WDM.
11.1 AON
DWDM . 11.1 . . . - , AWG (arrayed waveguide grating). - , (pp) . , , , -, , . -, , , AWG , . .
, (. 11.1 ). , .
DWDM , , . , (. 11.1 ), 10-12 , ( 20 , 1 , ( Oki Electric Industry).
11.1 DWDM :