optix osn 38006800 optical power calculation issue 1.01 [compatibility mode]

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Tnh ton cng sut OptiX OSN 6800

VTHN VTHN -- I VIN THNG H NI I VIN THNG H NI

2009 VTHN. All rights reserved. 2009 VTHN. All rights reserved. THNG TIN NI B V THUC QUYN BO MT CA VTHNTHNG TIN NI B V THUC QUYN BO MT CA VTHN11

Tng quan

l Khi thit k mng, commissioning, hay trong qu trnh vn

hnh khai thc mng WDM, chng ta cn tnh ton cng

sut. Kha ny s gii thiu v cch tnh ton cng sut

cho mng quang s dng OptiX OSN 6800.


V kha hc

l hon thnh kha hc bn cn nm cp OptiX OSN 3800/6800: ng dng v topo

p OptiX OSN 6800 M t phn cng


Tham kho

l Phn OptiX OSN 6800 Intelligent Optical Transport

Platform Hardware Description trong CD2

l PhnOptiX OSN 6800 Intelligent Optical Transport

Platform Commissioning Guide trong CD2

l Phn OptiX OSN 3800 Intelligent Optical Transport

Platform Hardware Description


Mc tiu

l Hon thnh kha hc bn c th:

p M t mi quan h gia cc im tham chiu cn tnh ton

p List the common indices on optical power calculation.

p Calculate the optical power.

2009 VTHN. All rights reserved. 2009 VTHN. All rights reserved. THNG TIN NI B V THUC QUYN BO MT CA VTHNTHNG TIN NI B V THUC QUYN BO MT CA VTHN55 PagePage55

Contents

1. Basics

2. Power Calculation


Contents

1. Basics

1.1 Review of the signal flow

1.2 Basic Concepts


Review of Signal Flow

OTUM40

M40

M40D40

F

I

USC1

OA

SC2

OTU

OTU

OTU

OA OA

OA

F

I

U

F

I

U

F

I

U

OA

M40D40

OTU

OTU

OTU

OTU

M40

M40OA

OTM1OTM1 OLAOLA OTM2OTM2

SC1


Review of Signal Flow (Cont.)

F

I

U

F

I

U

SC2

MR2

OA

OAMR2

MR2

MR2

OA

OA

FOADMFOADMOTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU



F

I

U

F

I

U

SC2

ROAM

OA

OA OA

OA

ROADM:ROADM:(ROAM)(ROAM)

ROAM

M 4 0D40M 4 0D40

OTU

OTU

OTU

OTU



F

I

U

OA

OA

WSD9 WSM9

WSM9 WSD9

OA

OA

F

I

U

M 4 0M40 M 4 0D40

M40 D40 M40 M40

ROADM:ROADM:(WSD9+WSM9)(WSD9+WSM9)

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU



F

I

U

OA

OA

WSD9 RMU9

RMU9 WSD9

OA

OA

F

I

U

M 4 0D40

M40 D40

ROADM:ROADM:(WSD9+RMU9)(WSD9+RMU9)

MR4

MR4

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU

OTU


p P (dBm) =10lg

p -10dBm = mW

p 0dBm = mW

p 10dBm= mW

p 20dBm = mW

p 20dBm-10 =10dBm

Units

p mW

the unit of optical power

p dBm

the unit of optical power

p dB

the unit of gain or attenuationof optical power

P(mW)

1(mW)

Calculation

Basic Concept


Formula

The situation of N wavelengths

Ptotal (dBm) Psingle (dBm) +10lgN(dB)

P1

Ptotal

P2

Suppose P1=P2=Psingle

Ptotal (mW) P1 (mW) + P2 (mW)

Ptotal (dBm) Psingle (dBm) +10lg2(dB)


Insertion Loss

l The loss of output optical power after the optical signals of

each channel pass through the corresponding channels.

Passive component

PoutPin

Insertion Loss (IL) = PinPout

Unit: dB


Common Indices

Name Insertion Loss Name Insertion Loss

FIU

1.5 dB (main channel)

MR2

1.5 dB (Add/Drop)

2.0 dB (OSC 1.0 dB(IN-MRO,MRI-

OUT)

MR8

4 dB (Add/Drop)

CMR4

4 dB (Add/Drop)

3.5 dB (IN-MRO,MRI-

OUT)

3.5 dB (IN-MRO,MRI-

OUT)

MR4

2.2 dB (Add/Drop)

CMR2

1.5 dB (Add/Drop)

1.5 dB (IN-MRO,MRI-

OUT)

1.0 dB (IN-MRO,MRI-

OUT)

M40/D40 6.5 dB M40V/D40V 8a dB


Common Indices (Cont.)

Name Insertion Loss Name Insertion Loss

RMU9

8.5 dB (EXPI-OUT)

ROAM

9a dB (Mx-OUT)

12.5a dB (AMx-TOA) 7 dB (IN-DM)

1.5 dB (ROA-OUT 14a dB (EXPI-OUT)

WSM9 8a dB (AMx-OUT, EXPI-OUT) 3 dB (IN-EXPO)

WSD9 8a dB (IN-DMx, IN-EXPO) DCM (S/A-F2.5/4/5/7/8/9/10 ( dB )

(G.652)

WSMD4 8a dB (AMx-OUT, IN-DMx)

Note: a. This value can be reached when the VOA is set to minimum.


Characteristics of OA

l Nominal Input Power

l Nominal Output Power

l Maximum output power of a single wavelength

l Gain

OA

Pout Pin

Pout

Gain = Pout (dBm) Pin (dBm)


Name Nominal input Power Range

Nominal output Power

Maximum output power of a single

wavelengthGain range

OBU101 -32-4(dBm) 16 dBm 0 dBm 201.5dB

OBU103 -32 ~ -3 (dBm) 20 dBm 4 dBm 231.5dB

OBU104 -32 ~ -1 (dBm) 16 dBm 0 dBm 171.5dB

OBU205 -24 ~ 0 (dBm) 23 dBm 7 dBm 231.5dB

OAU101 -32 ~ 0 (dBm) 20 (dBm) 4 dBm 2031

OAU102 -32 ~ -4 (dBm) 20 (dBm) 4 dBm 2436

CPRCGain 10dB (on G.652 fiber)

Gain 12dB (on LEAF fiber)

Common Indices (40 Channels)


Name Nominal input Power Range

Nominal output Power

Maximum output power of a single

wavelengthGain range

OBU101 -32-4(dBm) 16 dBm -3 dBm 201.5dB

OBU103 -32 ~ -3 (dBm) 20 dBm 1 dBm 231.5dB

OBU104 -32 ~ -1 (dBm) 16 dBm -3 dBm 171.5dB

OBU205 -24 ~ 0 (dBm) 23 dBm 4 dBm 231.5dB

OAU101 -32 ~ 0 (dBm) 20 (dBm) 1 dBm 2031

OAU102 -32 ~ -4 (dBm) 20 (dBm) 1 dBm 2436

Common Indices (80 Channels)


Characteristics of OTU

l Mean Launch Power

l Receiver sensitivity: A

l Receiver overload: B

Recommended Receiving Power Range: A+3(dBm) ~ B-

5(dBm)


Common Indices

Name Mean Launch Power (dBm)Receiving power Range

RemarkPIN (dBm) APD (dBm)

NS2 0 ~ 4, -5 ~ 0 -14 ~ 0, -16 ~ 0 -27 ~ -8

WDM Side

L4G 0 ~ 4, -5 ~ -1, -2 ~ 2 -25 ~ -9

LQMS -5 ~ -1, -2 ~ 3, -1 ~ 3 -18 ~ 0 -25 ~ -9, -30 ~ -9

LQMD -8 ~ -4, -5 ~ 0, -4 ~ 0 -18 ~ 0 -25 ~ -9, -30 ~ -9

LWX2 -5 ~ -1, -2 ~ 3 -18 ~ 0 -25 ~ -9

TQS -10 ~ -3, -5 ~ 0, -2 ~ 3 -18 ~ 0, -18 ~ -3 -27 ~ -9, -28 ~ -9Client Side

TQM -10 ~ -3, -5 ~ 0, -2 ~ 3 -18 ~ 0, -18 ~ -3 -27 ~ -9, -28 ~ -9

More information please refer to OptiX OSN 6800 Hardware Description


Questions

l What are the units related to optical power?

l The conversion between mW and dBm?

l If the input power of each channel is -4dBm, whats the value of

input power for 40 wavelengths?


Contents

1. Basics

2. Power Calculation


Contents

2. Power calculation

2.1 Power calculation of OSC

2.2 Power calculation of Main Path


l Typical Launch Power SC2: 0 ~ -4

SC1: 2 ~ 4.5dBm

l Sensitivity of SC1/SC2: -48dbm

l Receiving PowerLaunch Power - Loss of Fiber - 2IL of FIU.

Power Calculation of OSC

TM RMSC1/2SC1 SC1/2SC1

F

I

U

F

I

URM TM

2dBm

40km12dB

IL:1.5dB

0.5dBm -11.5dBm -13dBm

IL:1.5dB


Station A Station B

40km12dB

l The distance between station A and station B: 40km, line attenuation: 12dB.

l The same board configuration of station A and station B :

p Transmitting end: OBU101.

p Receiving end: OAU101.

OTM OTM

l Network topology

Power Calculation of Main Path - OTM


To station B

OTU

M40

M40 OBU101

F

I

U

Suppose Typical Launch Power of OTU: -2dBm.

Min. insertion loss of VOA : 2dB.

IL of M40: 6.5dB.

OBU101 nominal individual channel input/output Power-20/0dBm, typical gain: 20 dB.

IL of FIU:1dB.

VOA

l Signal flow and related indices at the transmitting side of station A



OTUM40

M40

F

I

U

To station B

l Typical optical power of the reference points at the transmitting side

of station A Single Channel

-2dBm -20dBm 0dBm -1dBm


OBUC01


M40M40

F

I

U

l Ptotal (dBm)Psigle (dBm) + 10lgN (dB)

OTU

OTU

-2dBm -20+10lgN 0+10lgN -1+10lgN

To station B

l Typical optical power of the reference points at the transmitting side

of station A Multiplex Channels


OBUC01


Station A Station B

l The launched optical power of station A : -1+10lgN(dBm).

l Attenuation of the line fiber: 12dB.

l The receiving optical power of station B: -13+10lgN(dBm).

OTM OTM40km12dB

-1+10lgN -13+10lgN

Power Calculation of Main Path - OTMl Network topology and the line optical power


IL of FIU:1dB.

Min. IL of VOA : 2dB.

OAU101 nominal individual channel input/output Power -16/4dBm, typical gain: 20 dB.

IL of D40: 6.5dB.

Typical receiving optical power of OTU: -16dBm (APD), -9dBm (PIN).

M40D40

F

I

U

M40D40

OTU

OTU

Fixed attenuator

-13+10lgN

l Signal flow and related indices at the receiving side of station B


From station A

OAU101


l If the input optical power of OAU is lower than the nominal power, VOA should be

removed.

PsinglePtotal - 10lgN - IL of D40.

From station A

M40D40OPU03

F

I

U

M40D40

OTU

OTU

l Typical optical power of the reference points at the receiving side

of station B-13+10lgN -16+10lgN 4+10lgN -2.5dBm


OAU101


Power Calculation of Main Path - OLA

Station A Station C

OLAOTM OTM

Station B

40km12dB

l OBU101 is used at the transmitting side of station A & C.

l OAU101 is used in station B.

C

B

B DCM-B

l Network topology

60km18dB

-1+10lgN -13+10lgN

-1+10lgN-19+10lgN

C DCM-C


OAU101

PA BAFrom station A

F

I

U

F

I

U

DCM(B)

l Typical optical power of the reference points from station A to station C

OAU101 nominal individual channel input/output power: -16/+4dBm, gain range: 20~31dB.

IL of DCM(B): 5dB. IL of FIU: 1 dB.

Actual gain of OAU101 is 20dB.

-13+10lgN -16+10lgN +4+10lgN +3+10lgN

Power Calculation of Main Path - OLA

To station C


l Please calculate the optical power of each reference point from station C to station A.

F

I

U

F

I

U

OAU101

BA

DCM(C)

PA

l Is it necessary to put VOA before OAU101?

l What is the actual gain of OAU101?

-19+10lgN

Questions

From station C

To station A


Station A Station C

FOADMOTM OTM

Station B

40km12dB


l OAU101/OBU101 is used at the station B.

l Two MR2 is used in station B.

B

B DCM-B

l Network topology

80km24dB

-1+10lgN -13+10lgN

Power Calculation of Main Path - FOADM


OAU101 nominal individual channel input/output Power -16/+4dBm,

gain range:20~31dB.

IL of DCM(B): 5dB. IL of FIU: 1dB. IL of MR2: 1dB.

OBU101 nominal individual channel input/output Power -20/0dBm.

OAU101

PA BAF

I

U

F

I

U

DCM(B)

MR2MR2

OTU

OBU101


OTU

OTU

OTU

-13+10lgN


From station A

To station C


OAU101

PA BAF

I

U

F

I

U

DCM(B)

MR2MR2

OTU

VOAOBU101

OTU

OTU

OTU

-13+10lgN

-16+10lgN +4+10lgN -20+10lgN 0+10lgN

-1+10lgN



From station A

To station C


Station A Station C

ROADMOTM OTM

Station B

40km12dB


l OAU101/OBU101 is used at the station B.

l Two ROAM is used in station B.

B

B DCM-B

l Network topology

80km24dB

-1+10lgN -13+10lgN

Power Calculation of Main Path - ROADM



gain range:20~31dB.

IL of DCM(B): 5dB. IL of FIU: 1dB. IL of D40: 6.5dB.

IL of ROAM: Mx-OUT:9dB, IN-DM:7dB, EXPI-OUT:14dB, IN-EXPO:3dB.


OAU101

PA BAF

I

U

F

I

U

DCM(B)

ROAM

OTU

OBU101

l Typical optical power of the reference points from station A to station COTU

OTU

OTU

-13+10lgN

Power Calculation of Main Path ROADM 1

From station A

To station C

ROAM

D40


OAU101

PAF

I

U

F

I

U

DCM(B)

OBU101

-13+10lgN

-16+10lgN +4+10lgN

-3+10lgN

0+10lgN

-1+10lgN


From station A

To station C

ROAM

OTU

OTU

OTU

OTU

ROAM

D40

BA

+1+10lgN

-20+10lgN



OAU1 nominal individual channel input/output Power -16/+4dBm, gain range:20~31dB.

IL of DCM(B): 5dB. IL of FIU: 1dB. IL of D40: 6dB, IL of M40V: 8dB.

IL of WSD9: 8dB(IN-DMx,IN-EXPO).

IL of RMU9: 8.5dB(EXPI-OUT), 12.5dB (AMx-TOA), 1.5 dB (ROA-OUT


OAU101

PA BAF

I

U

F

I

U

DCM(B)

WSD9

OTU

OBU101

l Typical optical power of the reference points from station A to station COTU-13+10lgN


From station A

To station C

RMU9

D40

M40V

OBU101

OTUOTU


OAU101

PAF

I

U

F

I

U

DCM(B)

OBU101

-13+10lgN


From station A

To station C

BA


WSD9

OTU

OTU

RMU9

D40

-16+10lgN +4+10lgN -20+10lgN

0+10lgN

-1+10lgNM40V

OBU101

OTUOTU



gain range:20~31dB.

IL of DCM(B): 5dB. IL of FIU: 1dB. IL of D40/M40: 6.5dB.

IL of WSD9: 8dB(IN-DMx,IN-EXPO). IL of WSM9: 8dB(AMx-OUT,EXPI-OUT).


OAU101

PA BAF

I

U

F

I

U

DCM(B)

WSD9

OTU

OBU101

l Typical optical power of the reference points from station A to station COTU

OTU

OTU-13+10lgN


From station A

To station C

WSM9

D40 M40


OAU101

PAF

I

U

F

I

U

DCM(B)

OBU101

-13+10lgN


From station A

To station C

BA WSD9

OTU

OTU

OTU

OTU

WSM9

D40 M40


B

C

-16+10lgN +4+10lgN

-4+10lgN

-10

-4+10lgN -12+10lgN

0+10lgN

-1+10lgN


l 80CH WSS ROADM


WSD9

OTU

OTU

OTU

OTU

D40-E

M40-O

OBU101OAU101

OTU

OTU

D40-O

WSM9

OTU

OTU

M40-E

-19+10lgN +1+10lgN

-7+10lgN

-8+10lgN

-3+10lgN

-15+10lgN (pass through)

-7+10lgN

-16+10lgN(add)

-2


l Please calculate the optical power of each reference point (40 channels)

Questions

F

I

U

F

I

U

OBUC01

-12+10lgN

From station A

To station C

WSMD4

OTU

OTU

OTU

OTU

D40

M40

OAU101 WSMD4

-4

Optical power of adding wavelength.

Optical power of passing through.


Summary

l OSC Power Calculation

l OTM Power Calculation

l OLA Power Calculation

l FOADM Power Calculation

l ROADM(ROAM) Power Calculation

l ROADM(WSD9+RMU9) Power Calculation

l ROADM(WSD9+WSM9) Power Calculation

Thank youwww.huawei.com

optix osn 38006800 optical power calculation issue 1.01 [compatibility mode]

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