, a , .. a, , (. 3).
. 3. |
a a, , a a [1]:
, / | (1) |
a ;
a ;
a ;
a ;
a , ;
a ;
a .
, . , , , . a, /, [1,3]:
(2) |
k , (0,8 4. )/. λ .
, 1550 , .
. , 1800 1/ GeO2 0,16 / 0,29 / 1550 1310 , .
. a . , - , , .. .
( ) a, , a.
, , ( ) . [1,3]:
(3) |
tgd , n- . , S - n = 1,4677. , L V - n = 1,4682. tgd 10-11 .
|
|
, 1990 . (99,9999%), . a(l) (. 2), ( 1290 1383 ).
. LWP (Low Water Peak Fiber) ZWP (Zero Water Peak), l =13803 0,31 /, , .
2. LWPF.
. 4 CorningÒ: () SMF-28ä ; () LWPF SMF-28eä.
2
LWPF | |
Corningâ | SMF-28eTM SMF-28e+TM |
Alcatel | |
Optical Fiber Solutions (OFS) | Allwave Truewave RS |
Draka | ESMF |
Fujikura | FutureGuide-LWP FutureGuide-SR15E |
Sumitomo Electric Industries Ltd. | PureBandTM |
Yangtze Optical Fibre and Cable (YOFC) | 268WY |
Pirelli | SMR |
1600 , Si-O SiO2 , - , , .
a [4]:
(4) |
C k ( k =0,7..0,9 ; =0,9).
2002 a 0,151 / l =1568 (Sumitomo Electric Industries Ltd.). 0,154 / 1986 . . , . : a =0,128 /; a =0,014 /; OH: 0,004 /; : 0,004 /. l =15201606 0,160 /.
() | () | ||
. 4. CorningÒ: () SMF-28ä; () LWPF SMF-28eä | |||
a . [1,5]: ; ; ; ; .
() 10 % .
|
|
.
, . , , , (. 5).
. 5. |
, / , . , , . , .
, , , (. 6).
. 6. |
G.652.A-D, G.655.E,D 1625 100 30 0.1 .
G.653. 1550 100 30 0.5 , G.653. - 0.1 .
G.655.-, G.656 1625 100 30 0.5 .
3-5.
3. Corning SMF28e (G.652.D)
, | , | , | |
£0,05 | |||
£0,05 | |||
£0,05 | |||
£0.05 |
4. OFS Truewave REACH (G.655)
, | , | , | |
£0,5 | |||
£0,5 | |||
£0,05 | |||
£0.05 |
5. Draka TeraLight (G.655)
, | , | , | |
£0,5 | |||
£0,05 | |||
£0,05 |
1. .., .., .. . .: , 2003. 288.
2. .., .., .. . . . .: -, 2003. 288.
3. .., .. . . .: , 2004. 248.
4. .. - - . .: , 2002. 360 .
5. . : . . .: , 1998. 288.