optical amplifiers (edfa)

XTM Series

Optical Amplifiers (EDFA)

Technical DescriptionOpt Line Amp C-Band 17dBm (OA17C)Dual Line Amp C-Band 17/17dBm (OA2-17/17CC)Opt Line Amp C-Band 20dBm (OA20C)Dual Line Amp C-Band 20/20dBm (OA2-20/20CC)Opt Low Gain Amp C-Band 20dBm (OA20C/LG)Dual Opt Low Gain Amp C-Band 20dBm (OA2-20/20/CC/LG)Opt Flat Gain Amp C-Band 10 dBm (OA10C/FG)

TD-OA

Rev D | 2018-03-18

Copyright

© Copyright 2018 Infinera Corporation. All rights reserved.

This Manual is the property of Infinera Corporation and is confidential. No part of this Manual may be reproduced forany purposes or transmitted in any form to any third party without the express written consent of Infinera.

Infinera makes no warranties or representations, expressed or implied, of any kind relative to the information or anyportion thereof contained in this Manual or its adaptation or use, and assumes no responsibility or liability of any kind,including, but not limited to, indirect, special, consequential or incidental damages, (1) for any errors or inaccuraciescontained in the information or (2) arising from the adaptation or use of the information or any portion thereofincluding any application of software referenced or utilized in the Manual. The information in this Manual is subject tochange without notice.

Trademarks

Infinera, Infinera Intelligent Transport Networks, I-PIC, IQ NOS, FlexILS, DTN-X, DTN, ATN, FastSMP and logos thatcontain Infinera are trademarks or registered trademarks of Infinera Corporation in the United States and othercountries. All other trademarks in this Manual are the property of their respective owners.

Infinera DTN-X, DTN, FlexILS, Cloud Xpress, XT and ATN Regulatory Compliance

FCC Class A

This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) thisdevice may not cause harmful interference, and (2) this device must accept any interference received, includinginterference that may cause undesired operation. Modifying the equipment without Infinera's written authorizationmay result in the equipment no longer complying with FCC requirements for Class A digital devices. In that event,your right to use the equipment may be limited by FCC regulations, and you may be required to correct anyinterference to radio or television communications at your own expense.

DOC Class A

This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus as set out inthe interference-causing equipment standard titled “Digital Apparatus," ICES-003 of the Department ofCommunications.

Cet appareil numérique respecte les limites de bruits radioélectriques applicables aux appareils numériques deClasse A prescrites dans la norme sur le matériel brouilleur: "Appareils Numériques," NMB-003 édictée par leMinistère des Communications.

Class A ITE

This is a Class A product based on the standard of the VCCI Council. If this equipment is used in a domesticenvironment, radio interference may occur, in which case, the user may be required to take corrective actions.

Warning

This is a class A product. In a domestic environment this product may cause radio interference in which case the usermay be required to take adequate measures.

FDA

This product complies with the DHHS Rules 21CFR 1040.10 and 1040.11, except for deviations pursuant to LaserNotice No. 50,dated June 24, 2007.

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TD-OA Rev D | 2018-03-18 IV

Infinera Proprietary and Confidential

CONTENTS

Contents1 Introduction.........................................................................................................................1

1.1 Document Revision History.........................................................................................12 Functional Description .........................................................................................................2

2.1 Designing Amplified Networks.....................................................................................33 Applications ........................................................................................................................4

3.1 In-line amplification on fiber-pair..................................................................................53.2 In-line amplification on single-fiber ..............................................................................53.3 Line amplifier in a 1U chassis......................................................................................6

4 Management.......................................................................................................................74.1 Board data ................................................................................................................74.2 Alarms ......................................................................................................................74.3 Remote Inventory ......................................................................................................74.4 Consequent actions ...................................................................................................84.5 Monitor point .............................................................................................................8

5 Mechanical Layout ..............................................................................................................95.1 Single Optical Amplifier ..............................................................................................95.2 Dual Optical Amplifier............................................................................................... 11

6 Technical Data ..................................................................................................................136.1 Introduction of R2B on 17 dBm Amplifiers ..................................................................15

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1 IntroductionThis manual provides an overview of the Optical Amplifier Units within the XTM Series. Thefollowing products are described:

Table 1 Product Overview

Single Optical Amplifier Dual Optical AmplifierOpt Line Amp C-Band 17dBm OA17C Dual Line Amp C-Band 17/17dBm OA2-17/17CCOpt Line Amp C-Band 20dBm OA20C Dual Line Amp C-Band 20/20dBm OA2-20/20CCOpt Low Gain Amp C-Band 20dBm OA20C/LG Dual Opt Low Gain Amp C-Band 20dBm OA2-20/20/CC/LGOpt Flat Gain Amp C-Band 10 dBm OA10C/FG

1.1 Document Revision HistoryTable 2 Document Revision History

Revision Date Description of changesA 2010-08-29 First released revision. Based on TD-OA rev S, 2009-11-30.B 2011-12-12 Updated HW revisions due to replacement of LTB components.C 2012-10-18 Updated/clarified chapter on Consequent actionsC1 2013-04-18 Editorial changesD 2018-03-18 Products OA17C and OA2-17/17CC in EOA process. See separate Product

Termination Notice (100025-PTN00066).Products OA20C and OA2-20/20CC in EOA process. See separate ProductTermination Notice (100025-PTN00067).

INTRODUCTION

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2 Functional DescriptionThe Optical Amplifier Unit is used to amplify aggregated optical signals. The amplifier boardscan be used in three applications:• As Pre amplifiers – To amplify wavelengths before they are connected to the receiver side

of Transponders.• As Power amplifiers – To amplify wavelengths out from Transponders to a high power level

prior to transmission.• As Line amplifiers – To amplify wavelengths at an intermediate site without electrical

regeneration.

Fig. 1 Block diagram, Optical Amplifier

All units are Class 1M products.

The dual amplifiers have two separate EDFA functions. They can be used independently.

The amplifiers have different gain values and gain characteristics. The selection of amplifiertype is dependent on channel count and span distance.

The 10dBm amplifier is primarily intended to be used as a pre-amplifier. The 17dBm and20dBm amplifiers can be used as power-, line- or pre-amplifiers. In some cases a 20dBm am-plifier can be needed in one direction, but a 17dBm is enough in the other direction. For suchsituations it is normally better to select a double 20dBm amplifier unit from cost perspective.

Optical amplifiers are used to regain optical power and enable bridging of distances up to thepoint where the chromatic dispersion sets the limit. Dispersion compensating devices (DCU’s)can be introduced to extend the distance to the point where e.g. optical noise have deterio-rated the signal quality to a level where electrical regeneration is needed before bridging an-other segment.

FUNCTIONAL DESCRIPTION

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2.1 Designing Amplified NetworksThere are also a number of other parameters that have to be taken into account when design-ing amplified networks. Some examples are:• Bit rate: The network must be designed for the highest bit rate. As an example, a link with a

mix of 10Gb/s and 40Gb/s wavelength channels will require a different configuration com-pared to a network with only 10Gb/s channels. The 40Gb/s channels will typically restrictthe maximum distance.

• Line coding with or without Forward Error Correction (FEC): Some transponders have FECthat will give 3 to 5dB better power budget compared to transponders without FEC.

• Dispersion properties: Some Transponders have lasers with better dispersion tolerances.• Optical noise tolerance (OSNR)• Number of channels: A network with max 16 channels will not have the same design solu-

tion as a network that needs to carry up to 80 channels.To conclude, amplified networks requires more technical skills to design compared to un-am-plified networks. In un-amplified networks all wavelengths are independent and it is mostly justa matter of making power budget and dispersion limit calculations on a per wavelength basis.

Designing amplified networks with line amplifiers requires that all wavelength channels mustbe taken into consideration. It is the “worst” wavelength channel that will define the completenetwork design.

Please see “Installation and Commissioning Amplified Links, Release nn” within the In-stallation & Commissioning manual for further details.

FUNCTIONAL DESCRIPTION

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3 Applications

APPLICATIONS

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3.1 In-line amplification on fiber-pair

Fig. 2 In-line” amplification example

Fig. 2 In-line” amplification example shows the traditional fiber-pair configuration where theamplifiers are placed “in-line” and consequently amplifies all wavelengths on the line fiber.

See Dimensioning Guidelines document within the System Manual for details on spanlengths.

See Optical Amplifiers and Amplified Links Installation Guide within the System Manual for de-tails on amplified networks.

3.2 In-line amplification on single-fiber

Fig. 3 In-line” amplification example

Fig. 3 In-line” amplification example shows how an amplified link can be established on a sin-gle-fiber. MDU-E and MDU-T is used in transmit direction (east) while MDU8-T/EVEN-C andMDU8-E/EVEN-C are used in the receive direction (west). The optical interleaver is used tocombine the two directions onto a single-fiber. The same interleaver type is used to separatethe directions at the line amplifier site to enable amplification as well as combined the two afteramplification.

In-line amplification is typically only used in fiber-pair configurations, but with the above setupit can be applied also for single-fiber configurations.

An OSC channel is injected using single-fiber CWDM AD-filters to enable remote manage-ment access to the line amplifier site.

APPLICATIONS

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3.3 Line amplifier in a 1U chassisIn release R14.0 and onwards, the VOA-2CH can be placed in the passive slot of a TM-102/II,TM-102 or TM-101 together with any of the below listed OA units. The Embedded Node Man-ager (ENM) in the OA unit will thus manage both the OA function as well as the VOA/2CH.• OA10C/FG• OA17C• OA2-17/17CC• OA2-20/20/CC/LG• OA2-20/20CC• OA20C• OA20C/LG• OA20C/VG• OA2-20/20/CC/VG• OA20C/VG/II• OA2-20C/VG/II

Fig. 4 Compact 1U Line Amplifier NE

The 2ch VOA enables remote adjustment of the attenuation between two sites. This can beused to provide optimum working conditions for the EDFA amplifier and also to compensatefor change in fiber attenuation due to e.g. a fiber splice. Note that this Line Amplifier NE hasno OSC channels. Remote management access must consequently be done via a local DCNconnection.

Only the OA20C/VG/II and OA2–20C/VG/II supports SSH/SSL in CU-less mode.

APPLICATIONS

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4 Management

4.1 Board dataAll boards/units within a XTM Series Network Element have unit related information stored innon-volatile memory banks. This information is stored at production and is required for admin-istration and start-up of the boards.

The information is divided into three main groups:• Environmental data - Contains data, which is read and used without knowledge of produc-

tion data version.• Generic board data - Contains administrative data, which is included on all boards, both ac-

tive and passive.• Specific board data - Data needed for proper board operation.Some alarms are based on the presence of this information:• “Vital Product Data Missing”: Information in the board data memory bank that is vital to

manage the unit is missing. This alarm is classified as “critical” and may require boardreplacement.

• “Non-vital Product Data Missing”: Information in the board data memory bank that is not vi-tal to manage the unit is missing. This alarm is classified as “minor”.

• Board missing: The Control Unit can no longer detect the presence of the unit.See System Manual Volume C, Operation & Maintenance for further details.

4.2 AlarmsAny generated alarms are collected by the Control Unit and accessible via the node managerENM or the Dynamic Network Administrator - Metro (DNA-M). The status LED (STS-LED) onthe board front indicates the severity of the active alarms. See 5Mechanical Layout.

See Alarm Overview within Operations & Maintenance volume of the System Manual for moredetails on alarms, severity levels and corresponding LED indicators.

4.3 Remote InventoryAn on-board EE-PROM enables remote extraction of inventory data. The information providedis:• Unit name• Unit HW Product number• HW revision• Unit SW product number• SW revision• Unit Manufacturer• Unit serial number

MANAGEMENT

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4.4 Consequent actionsOA units with two amplifier blocks can be set in Automatic Power Shutdown (APS) mode. Thismeans that if the input power to one of the amplifier modules is lost, then the output power ofthe other module is shut down. This is a security measure to ensure that a fiber segment is op-tically shut down upon a fiber break. However, the power levels generated by these EDFAmodules are well below the levels where this APS functionality is required (See ITU-T G.664and IEC 60825-2). For Class 1M systems an APS function is consequently not required. It isalso not recommended to have the APS mode active since this could affect the start-up timeafter a fiber break for a link with multiple cascaded amplifiers.

Single amplifier boards do not have an APS mode.

The amplifier units also have a “forced-on” mode where the amplifier generates output powereven if no input power exist. This mode is only to be used during commissioning when nowavelength channels are available. A link in operation shall never have an amplifier in forced-on mode since this will give the wrong behavior.

Fig. 5 Consequent actions upon loss of input signal

4.5 Monitor pointAll amplifiers (except OA10C) have a monitor point corresponding to 1% of the output power,corresponding to 20dB lower than the output power.

MANAGEMENT

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5 Mechanical Layout

5.1 Single Optical AmplifierAll single OA units have the same mechanical solution. To identify units type, see the productlabel on top (Unit type).

MECHANICAL LAYOUT

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Fig. 6 OA 10C FG

MECHANICAL LAYOUT

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5.2 Dual Optical AmplifierAll dual OA units have the same mechanical solution. To identify units type, see label on top(Unit type) or on product label placed on upper handle.

MECHANICAL LAYOUT

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Fig. 7 OA 2 20/20C

MECHANICAL LAYOUT

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6 Technical DataThis section lists the technical data for Optical Amplifiers.

Table 3 Electrical Data

Parameter Value CommentPower consumption Depending on operating mode and ambient temperatureOA10FG 11 WOA15 4 WOA15/15C 5 WOA17C 11 WOA2-17/17CC 20 WOA20C and OA20C/LG 14 WOA2-20/20/CC and OA2-20/20/CC/LG

27 W

Table 4 Optical Data, OA10, OA15, OA20, OA10FG, OA17, OA20LG

Parameter Unit OA10FG OA17COA2-17/17CC

OA20COA2-20/20CC

OA20C/LGOA2-20/20/CC/LG

Max output power dBm 10 16.7 19.5 19.5Min output power dBm -15 -7 -7 -7Input power range( LI- Low input range) dBm NA -35 to -5 -35 to -5 1 -31 to -1

Input power range( HI- High input range)

dBm -35 to -3 -25 to +8 -25 to +8 -25 to +5

Gain @ Optimum gainflatness

dB 20 23 26 22

Settable gain dB 13 – 30 13 - 30 in LI13-28 in HI

13 – 30 in LI13-28 in HI

13 – 29

Nose figure dB < 5.5 < 5.5 < 5.5Monitor port -20 -20 -201. For OA17/OA20 the input signal can be detected at -40, however with lower accuracy. Therefore a default LOS threshold is set

at -37dBm and it is recommended to use at -35 to -5 dBm

TECHNICAL DATA

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Table 5 Product Revision Data

Product number Rev Release CommentOA10C R1A A1.2 1st released version.

R1B A3.2 HW-change to enable new OA modelling. Newoverlay,

10.0 EOA-E (LTB) Feb 2008OA10/10C R1A A2.0 1st released version.

R1B A3.2 New overlay. Corrected port numbering on overlay.HW-change to enable new OA modelling

9.0 Terminated. No units delivered.OA15C R1A A2.2 1st released version.

R1B A3.2 HW-change to enable new OA modelling. Newoverlay

A4.1 EOA-E (LTB)OA15/15C R1A A2.2 1st released version.

R1B A3.2 HW-change to enable new OA modelling. New over-lay. Corrected port numbering on overlay

A4.1 EOA-E (LTB)OA17C R1A A4.0 1st released version.

R2A A5.0 PCB correctionsR2B A5.0 Introduction of temperature stabilized EDFA moduleR2C R18 Replacement if LTB componentsProduct OA17C in EOA process. See separate Product Termination Notice (100025-PTN00066).

OA2-17/17CC R1A A4.0 1st released version.R2A A5.0 PCB correctionsR2B A5.0 Introduction of temperature stabilized EDFA moduleR2C R18 Replacement if LTB componentsProduct OA2-17/17CC in EOA process. See separate Product Termination Notice(100025-PTN00066).

OA17POW R1A A4.0 1st released version.A4.1 Terminated

OA20C R1A A6.0 1st released version.R1B R18 Replacement if LTB componentsProduct OA20C in EOA process. See separate Product Termination Notice (100025-PTN00067).

OA2-20/20/CC R1A A6.0 1st released version.R1B R18 Replacement if LTB componentsProduct OA2-20/20CC in EOA process. See separate Product Termination Notice(100025-PTN00067).

OA10C/FG R1A 10.0 1st released versionR1B R18 Replacement if LTB components

OA20C/LG R1A 10.0 1st released versionR1B R18 Replacement if LTB components

OA2-20/20/CC/LG R1A 10.0 1st released versionR1B R18 Replacement if LTB components

TECHNICAL DATA

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6.1 Introduction of R2B on 17 dBm AmplifiersIn release A5.0 the R-state of the 17dBm amplifiers were increased to R2B due to introductionof a temperature stabilized EDFA module. This change is vendor induced to provide a moregeneric product.

The R2B versions of the OA17C and OA2-17/17CC units are compatible with the previous re-visions. That means that they can be used as spare part or replacement for each other. Sincethe temperature variations of the R2B version will be smaller than the previous versions, thealarm and warning thresholds must be adjusted to avoid unnecessary high/low temperaturealarms.

For OA17C R2A and OA2-17/17CC R2A:

Set laserTempHighRelativeThreshold to +45.0°C.Set laserTempLowRelativeThresld to –25 (-45.0)°C.

For OA17C R2B or later and OA2-17/17CC R2B or later:

Set laserTempHighRelativeThresld to +1.0°C.Set laserTempLowRelativeThresld to -1.0°C.

TECHNICAL DATA

optical amplifiers (edfa)

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