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ВОЛОКОННО-ОПТИЧЕСКИЕ СИСТЕМЫ СВЯЗИ PowerPoint PPT Presentation


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ВОЛОКОННО-ОПТИЧЕСКИЕ СИСТЕМЫ СВЯЗИ. Основной принцип : передача информации в виде оптических сигналов по стеклянному волокну. Вопрос : А зачем?. Достоинства оптической передачи и обработки информации. Телекоммуникационные длины волн:

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6055192

-

:

.

: ?


6055192

:

= 0.81.6 f = (23)1014

:

10 - 40 /

WDM-: 80- 320 : 4080 = 3.2 /

24 10 ,

: 32 /

: 1/500 .


6055192

-

-

-

- ( 960 )


6055192

,

n1 > n2,3


6055192

- ()

n1 > n2,

sin > n2/n1

:

sin = n2/n1

-

( )

4akn1sin 12 13 = 2N,

N = 0, 1, 2 ..., k = 2/


6055192


6055192

:

8-9 (), 50-60 ()

: 125


6055192


6055192

1.

2. : Fe, Cu, Ni, Mg, Cr, OH.

3. .

4. - .

5.

6. .

7. ( ).

8. .

9.

10. -

11.

12.

13.

14.

15.


6055192


6055192


6055192

( )

SiO2 + GeO2


6055192

:

0.0010.0001 /

:

50100


6055192

WDM

WDM: wavelength distribution multiplexing

80320


6055192


6055192

1, 6.

2, 5.

3, 7.

4. (Er3+)

8.


6055192


6055192

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, , .

:

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