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OTC304202 OptiX Metro WDM Optical Power Calculation

ISSUE 1.0

2Internal Use

ReviewReview

Do you remember the Signal Flow of OptiX Metro 6100/6040?

OTM – OLA -- OADM -- OTM

3Internal Use

ObjectivesObjectives

Upon completion of this course, you will be able to:

Grasp the relation of each Reference Point on the Equipments;

Grasp the Optical Power Calculation; Grasp the common indices on Optical

Power Calculation.

4Internal Use

ReferenceReference

OptiX Metro6100 Technical Manual OptiX Metro 6040 User Manual

5Internal Use

Basics

Review the Signal Flow

Common Indices

Optical Power Calculation

6Internal Use

Signal Flow of OptiX WDM SystemSignal Flow of OptiX WDM System

M40

D40

LWF

LWF

LWF

LWF

LWF

LWF

FIU

SCC SC1

OAU

OAU

O T M1

M40

TWD

FIU

SCCSC1

OAU

O T M2

D40

LWF

LWF

LWF

OAU

LWF

LWF

LWF

SCC

SC2FIU

FIU

O L A

FIBER

FIBER

RC

TM

OUT

IN

RM

TC

ININ OUT

OUTOUT

RC

RC

RC

RM

RM

RM

TC

TC

TC

IN

TM

TM

TM

RM2TM1

TM2RM1 RM

TM

RM

TM

OAU

OAU

DCM

DCM DCM

DCM DCM

DCM

7Internal Use

Common IndicesCommon Indices

Insertion Loss (M40, D40, MR2, DCM……)

Specification of OA (OAU, OBU,OPU)

Specification of OTU

8Internal Use

Specifications of OAU/OPU/OBUSpecifications of OAU/OPU/OBU

Type Gain (dB)

Minimum input optical power (dBm)

Maximum output optical power (dBm)

Width of front panel(nm)

OAU-C01 20 – 33 -32 20 64

OAU-C02 20 – 33 -32 17 64

OAU-C03 26 – 32 -32 20 64

OBU-C01 23 -32 17 32

OBU-C02 23 -22 20 64

OPU-C01 20 -32 14 32

OPU-C02 20 -32 14 32

9Internal Use

Specification of OTUSpecification of OTU

OTU TypesReceiver Sensitivi

ty (dBm)Overload Power

(dBm)Mean Launch Power (d

Bm)

OCU

DWDM Side

-17 0 -1~-5

Client Side -18 -3 -3~-9

LDG

DWDM Side

PIN:-18 PIN:0 -10~2 （ EA ）-10~7 (Direct Modulation)APD:-25 APD:-9

Client Side1310 ： -19 1310 ： -3 1310:-11.5~-3

850 ： -17 850 ： 0 850:-9.5~0

LWX

DWDM Side

PIN:-18 PIN:-3 -10~2(EA-10~7 (Direct Modulation)APD:-25 APD:-9

Client Side -18 -3 -10~-4

10Internal Use

Specification of OTUSpecification of OTU

OTU TypesReceiver Sensitivit

y (dBm)Overload Power (dBm)

Mean Launch Power (dBm)

LWM

DWDM Side

PIN:-18 PIN:0 -10~2 （ EA ）-10~7 （ Direct Modulation ）APD:-25 APD:-9

Client Side -18 -3 -10~-3

LQS

DWDM Side

PIN:-18 PIN:0 -10~2 （ EA ）-10~7 （ Direct Modulation ）APD:-25 APD:-9

Client Side -28 -8 1310nm : -8~-15

LGS

DWDM Side

PIN:-18 PIN:0 -10~2 （ EA ）-10~7 （ Direct Modulation ）APD:-25 APD:-9

Client Side SDH:-28 -8 SDH : -8~-15

GE （ 1310nm ） :-19

-3 1310nm : -9.5~0

GE （ 850nm ） :-17 0 850nm : -11.5~-3

11Internal Use

Basics

Optical Power Calculation

Power calculation of OSC

Power calculation of Traffic Channel

12Internal Use

Power Calculation of OSCPower Calculation of OSC

Typical Launch Power of SC2/SC1/TC1/TC2: -3~-4dBm IL of FIU (from RM to OUT or from IN to TM): 1dB Receiving Power ＝ Launch Power – Loss of Fiber – 2•IL of FIU

13Internal Use

Power CalculationPower Calculation of Traffic Channel of Traffic Channel

Power calculation of OTM

Power calculation of OLA

Power calculation of OADM

14Internal Use

Power CalculationPower Calculation of OTM - Transmitting Side of OTM - Transmitting Side

Note:1. Nominal Insertion loss of V40: 9dB,2. POutput ＝ PInput of Channel ＋ Gain ＋ 10lgN, N: number of channel.

Fixed Attenuator

VOA

① Typical Launch Power: -2dBm② IL of M40:6dB③ ⑥ Min. IL of VOA:2dB④ Nominal Input Power of individual channel:-19dBm⑤ Nominal Output Power of individual channel:1dBm⑦ IL of DCM: depend on compensation distance ⑧ Nominal Input Power of individual channel:-15dBm⑨ Nominal Output Power of individual channel: 4dBm⑩ IL of FIU: 1dB

To Fiber

IL-Insertion Loss

OAUFIUOTU M40

DCM

20

19

PA BA

① ② ③ ④ ⑤ ⑥ ⑦

⑧ ⑨ ⑩

15Internal Use

Power calculationPower calculation of OTM - Receiving Side of OTM - Receiving Side

OAU

FIU D40OTU

DCM

20

19

PA BA

① ② ③ ④ ⑤⑥

⑦ ⑧ ⑨ ⑩

From Fiber

Fixed Attenuator

VOA① IL of FIU: 1dB② ⑤ Min. IL of VOA:2dB

③ Nominal Input Power of individual channel:-19dBm ④ Nominal Output Power of individual channel:1dBm ⑥ IL of DCM: depend on compensation distance ⑦ Nominal Input Power of individual channel:-15dBm ⑧ Nominal Output Power of individual channel: 4dBm

⑨ IL of D40:6dB ⑩ Typical Receiving Power: -10dbm(PIN)

If ESC is available, FIU and SC1/2 (orTC1/2) are not involved in power calculation.

16Internal Use

Power calculationPower calculation of of OLAOLA

OAU

FIUFIU

DCM

20

19

PA BA

① ② ③ ④ ⑤ ⑥

⑦ ⑧ ⑨

From Fiber To Fiber

① ⑨ IL of FIU: 1dB② ⑤ Min. IL of VOA:2dB

③ Nominal Input Power of individual channel:-19dBm ④ Nominal Output Power of individual channel:1dBm ⑥ IL of DCM: depend on compensation distance ⑦ Nominal Input Power of individual channel:-15dBm ⑧ Nominal Output Power of individual channel: 4dBm

Fixed Attenuator

VOA

Note:If the input optical power of PA is lower than the nominal power, VOA must be removed to make input power as high as possible, input optical power of BA must reach the nominal value.

17Internal Use

Power calculationPower calculation of OADM I of OADM I

OAU

20

19

PA BA

① ② ③ ④

⑤

⑥ ⑦ ⑧ ⑨DCM

FIUFIU2

3MR2

OTU

OTU

MR2

OTU

OTU

OBU

① ⑨ IL of FIU: 1dB② ④ ⑦ Min. IL of VOA:2dB

③ Nominal Input Power of individual channel:-19dBm ⑤ IL of DCM: depend on compensation distance ⑥ Nominal Input Power of individual channel:-15dBm

⑧ Nominal Input Power of individual channel:-15dBm

Fixed Attenuator

VOA

From Fiber To Fiber

18Internal Use

Power calculationPower calculation of OADM II of OADM II

20 19

PA BA

① ②

③

④ ⑤ ⑥ ⑦

⑨From Fiber

FIUFIUTo Fiber

MR2

OTU

OTU

MR2

OTU

OTU

OAU-I

① ⑧ IL of FIU: 1dB② ⑤ ⑨ Min. IL of VOA:2dB

③ Nominal Input Power of individual channel:-19dBm ④ Nominal Output Power of individual channel:1dBm ⑥ Nominal Input Power of individual channel:-15dBm

⑦Nominal Output Power of individual channel: 4dBm

Fixed Attenuator

VOA

OAU-II①

19Internal Use

Power calculationPower calculation of OADM of OADM

Ensure the power flatness of pass-through channel and add channel

Ensure that power of OBU or BA in OAU reach the Nominal Value. Power calculation of dropping/adding wavelength channel

If ESC is available, FIU and SC1/2 (orTC1/2) are not involved in power calculation.

20Internal Use

SummarySummary

How to calculate multiplex wavelength optical power? answer

QuestionsQuestions

21Internal Use

PracticePractice

If there are four wavelengths in the actual network,If there are four wavelengths in the actual network,please calculate the optical power of the reference points.please calculate the optical power of the reference points.

MR2

MR2

M40

D40

LWF

LWF

LWF

LWF

LWF

LWF

FIU

SCC SC1

OAU

OAU

O T M1

M40

TWD

FIU

SCCSC1

OAU

O T M2

D40

LWF

LWF

LWF

OAU

LWF

LWF

LWF

SC2FIU

FIU

O L A

FIBER

FIBER

RC

TM

OUT

IN

RM

TC

ININ OUT

OUTOUT

RC

RC

RC

RM

RM

RM

TC

TC

TC

IN

TM

TM

TM

RM2TM1

TM2RM1 RM

TM

RM

TM

OAUDCM

DCM

DCM

DCM

MO

MO

MI

MI

OAU OBU

OAUOBU

A

1

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B C D E F G

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