OTC304202 OptiX Metro WDM Optical Power Calculation

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OTC304202 OptiX Metro WDM

Optical Power Calculation

ISSUE 1.52

HUAWEI TECHNOLOGIES CO., LTD. All rights reserved Page 1

Review

Do you remember the Signal Flow of

OptiX Metro 6100/6040?

OTM – OLA – OADM – OTM


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.


References

OptiX Metro6100 Technical Manual

OptiX Metro 6040 User Manual


Chapter 1 Basics

Chapter 2 Optical Power Calculation


Common Indices

Insertion Loss (M40, D40, MR2, DCM……)

Specification of OA (OAU, OBU,OPU)

Specification of OTU


Insertion Loss

Type MR2 MR4 MB2 M40/D40 DCM(G.652)

IN－DROP <1.5dB <2.5dB <3dB

<8dB null

ADD－OUT <1.5dB <2.5dB <3dB

IN－MO or

IN-MRO，MRI-OUT <1dB <1.5dB <2dB

MI－OUT or

IN-BMO，BMI-OUT <1dB <1.5dB <1dB

20kmDCM

null

<4dB

40kmDCM <5dB

60kmDCM <7dB

80kmDCM <8dB

100kmDCM <9dB


Specifications 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

OAU-C05 23－36 －32 23 64

OBU-C01 23 －32 17 32

OBU-C03 23 －22 20 64

OBU-C05 23 －22 23 64

OPU-C01 20 －32 14 32

OPU-C02 20 －32 14 32

OPU-C03 23 －32 15 32


OTU TypesReceiver

Sensitivity (dBm)

Overload Power

(dBm)Mean Launch Power (dBm)

OCU

DWDM Side-17 0 -1~-5

Client Side -18 -3 -3~-9

LDG

DWDM SidePIN:-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

LWXDWDM Side

PIN:-18 PIN:-3 -10~2(EA ）

-10~7 (Direct Modulation)APD:-25 APD:-9





OTU TypesReceiver Sensitivity

(dBm)

Overload Power

(dBm)Mean Launch Power (dBm)

LWMDWDM Side

PIN:-18 PIN:0 -10~2（ EA ）

-10~7（ Direct Modulation ）APD:-25 APD:-9


LQSDWDM Side

PIN:-18 PIN:0 -10~2（ EA ）


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

LGS

DWDM SidePIN:-18 PIN:0 -10~2（ EA ）


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

GE（1310nm）:-19 -3 1310nm : -9.5~0

GE（850nm）:-17 0 850nm : -11.5~-3


Chapter 1 Basics

Chapter 2 Optical Power Calculation


Power 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


Power Calculation of Traffic Channel

Power calculation of OTM

Power calculation of OLA

Power calculation of OADM


Power Calculation 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: -2dBm

②⑥ Min. IL of VOA:2dB

③ IL of M40:6dB

④ Nominal Input Power of individual channel:-19dBm

⑤ Nominal Output Power of individual channel:1dBm

⑦ IL of DCM: depend on compensation distance

⑧ Nominal Input Power of individual channel:-15dBm

⑨ Nominal Output Power of individual channel: 4dBm

⑩ IL of FIU: 1dB

IL-Insertion Loss

⑥ ⑧To Fiber

OAUFIU

DCM

20

19

PA BA

① ② ③ ④ ⑤

⑦

⑨ ⑩

OTU M40


Power Calculation of OTM - Receiving Side

OAU

FIU D40 OTU

DCM

20

19

PA BA

① ② ③ ④ ⑤⑥

⑦ ⑧ ⑨ ⑩

From Fiber

Fixed Attenuator

VOA① IL of FIU: 1dB

②⑤ 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.


Power Calculation of OLA

OAU

FIUFIU

DCM

20

19

PA BA

① ② ③ ④ ⑤

⑥

⑦ ⑧ ⑨

From Fiber To Fiber

①⑨ IL of FIU: 1dB

②⑤ Min. IL of VOA:2dB


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.


Power Calculation of OADM

OAU

20

19

PA BA

① ② ③ ④

⑤

⑥ ⑦ ⑧ ⑨

DCM

FIUFIU

23MR2

O

T

U

O

T

U

MR2

O

T

U

O

T

UOBU

①⑨ IL of FIU: 1dB

②④⑦ Min. IL of VOA:2dB


⑤ IL of DCM: depend on compensation distance

⑥ Nominal Input Power of individual channel:-15dBm

⑧ Nominal Input Power of individual channel:-19dBm

Fixed Attenuator

VOA

From Fiber To Fiber


Power Calculation 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


Summary

How to calculate multiplex wavelength optical power?

answer


Practice

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

A

1

4

B C D E F G

M

R

2

M

R

2

M

4

0

D

4

0

LWF

LWF

LWF

LWF

LWF

LWF

F

I

U

SCC SC1

OAU

OAU

O T M1

M

4

0

TWD

F

I

U

SCCSC1

OAU

O T M2

D

4

0

LWF

LWF

LWF

OAU

LWF

LWF

LWF

SC2F

I

U

F

I

U

O L A

F

I

B

E

R

F

I

B

E

R

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

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OTC304202 OptiX Metro WDM Optical Power Calculation

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