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中国通信建设第二工程局有限公司贵州维护总站 China Telecom. Constrction 2nd Engineering Co.,Ltd Guizhou Branch PowerPoint PPT Presentation


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中国通信建设第二工程局有限公司贵州维护总站 China Telecom. Constrction 2nd Engineering Co.,Ltd Guizhou Branch. 长途光缆线路维护技术培训. ------ 仪器仪表 OTDR 部分. 中国通信建设第二工程局有限公司 贵州维护总站 2010 年 3 月. 3. 3. 3. 3. 3. 1. 3. 2. 4. 5. 内容提要. OTDR 基本知识. OTDR 的相关介绍. OTDR 的工作原理.

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中国通信建设第二工程局有限公司贵州维护总站 China Telecom. Constrction 2nd Engineering Co.,Ltd Guizhou Branch

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China Telecom. Constrction 2nd Engineering Co.,Ltd Guizhou Branch

------OTDR

20103


3

3

3

3

3

1

3

2

4

5

OTDR

OTDR

OTDR

OTDR


OTDR

  • OTDR

  • 1

  • 2

  • OTDR

  • OTDR


OTDR

  • OTDR

    • AC/DC

    • OTDR

  • OTDR

  • OTDRG.652OTDR

    • 1

  • A1550nm 1550nm,


OTDR

  • B

  • C 3us 10us

  • D 140km 260km

  • 1.4

  • E

  • F12S 51012

    • 2

  • A

  • B


OTDR

  • C 0.10dB/km 0.10dB/km

  • D

  • E

  • F

  • G

  • H

  • I

    • 3

  • A1550nm SM

  • B1.468

  • C81


OTDR

OTDR


OTDR

  • AC/DC

  • 95%

  • 2/

  • MTS

  • 25

  • MTS30

  • 10

  • 11

  • 12

  • 13


3

3

3

3

3

1

3

2

4

5

OTDR

OTDR

OTDR

OTDR


OTDR

  • OTDR

  • AgilentANRITSUEXFOWAVETEK

  • 41AV6411 OTDR)

  • 40/39dB:

  • 1310nmL40/0.35=114KM

  • 1550nmL39/0.25=156KM

  • OTDR(

  • 1

  • 2

  • 3CPU


OTDR


3

3

3

3

3

1

3

2

4

5

OTDR

OTDR

OTDR

OTDR


OTDR

  • OTDR

  • OTDR

  • OTDR100


OTDR

OTDROTDR


OTDR

  • Rayleigh Backscatter()

  • =5Log(P0WS)-10ax(loge)

  • P0:

  • W

  • S/

  • a/

  • 1=8.686dB

  • x

  • 4


3

3

3

3

3

1

3

2

4

5

OTDR

OTDR

OTDR

OTDR


OTDR


OTDR

  • 0.08dB

1

2

3


OTDR

1

0.08dB

0.05dB

2

OTDR

3

OTDR


OTDR

4/

1.52.0

5

OTDROTDROTDR

8//

=0.25

0.258/300000000/s/1.4681100ns


OTDR

6

OTDR

SM():1550nm1.4681001310nm1.467500

MM1300nm1.487000850nm1.496000

7

OTDR

SM1550nm83.0dB1310nm80.0dB

MM ()1300nm74.0dB850nm67.0dB


OTDR

  • 8

  • OTDROTDROTDROTDR

  • 23


OTDR

1

2

3

4

5

6

7

8

9


OTDR


OTDR

1


OTDR

2


OTDR

3


OTDR

4


OTDR

5


OTDR

6

1 2 3


OTDR

7


OTDR

8


OTDR

9


3

3

3

3

3

1

3

2

4

5

OTDR

OTDR

OTDR

OTDR


1.:

2.

OTDR()

()


  • 1. OTDROTDR() OTDR()OTDR()


  • (1) La=(S1-S2)/(1+P) La;S1;S20.6-1.2;PP=(Sa-Sb)/SbSa;Sb:3-5 :10-15 (2) Ly=LbLa :Ly;Lb+- Ly


  • 2OTDR()

  • 3OTDR()


  • 4OTDR500m OTDR20km


1.

2.

3.

4.

5.


1

OTDROTDRMW9076B1m310E-5,,,,,

2

OTDROTDROTDR


3

0.01dB

4


5

A

BOTDR

C

D


11OTDROTDR 2OTDR 3OTDR25/1


2SODF


3OTDRLL = L1L2/1+PL3L4L5 1+aL1OTDRL2L3L4L5a0.5%0.7%1%PPPRh


4

5


1. 005

OTDR

LSA/2PA


  • LSA


2PA)


LSA2PA

  • LSA


2PA



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