TD_OA10, OA15, OA17, OA20
TD_OA10, OA15, OA17, OA20
TD_OA10, OA15, OA17, OA20
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TM-Series<br />
Technical Description<br />
Optical Amplifier Units<br />
<strong>OA10</strong>C/FG R1 <strong>OA10</strong>C R1<br />
<strong>OA17</strong>C R1 OA2-17/17CC R1<br />
<strong>OA20</strong>C R1 OA2-20/20CC R1<br />
<strong>OA20</strong>C/LG R1 OA2-20/20/CC/LG R1<br />
Rev S, 2009-11-30<br />
Class 1M<br />
Products
IN COMMERCIAL CONFIDENCE<br />
OPTICAL AMPLIFIER UNIT<br />
Date: Doc. number: Rev: Page<br />
© Transmode 2009-11-30 <strong>TD</strong>-OA S 2 (15)<br />
Table of Content<br />
1 General...............................................................................................................3<br />
1.1 In commercial confidence ...............................................................................................3<br />
1.2 Document Revision History.............................................................................................3<br />
2 Functional Description........................................................................................4<br />
2.1 General description.........................................................................................................4<br />
2.2 Applications.....................................................................................................................6<br />
2.2.1 Off-line amplification on single-fiber ................................................................................6<br />
2.2.2 In-line amplification on fiber-pair .....................................................................................7<br />
2.2.3 In-line amplification on single-fiber..................................................................................8<br />
2.2.4 Line amplifier in a 1U chassis .........................................................................................9<br />
2.3 Alarms...........................................................................................................................10<br />
2.4 Board data ....................................................................................................................10<br />
2.5 Remote inventory..........................................................................................................11<br />
2.6 Consequent actions ......................................................................................................11<br />
2.7 Monitor point .................................................................................................................11<br />
3 Mechanical Layout ...........................................................................................12<br />
3.1 Single OA’s ...................................................................................................................12<br />
3.2 Dual OA’s......................................................................................................................13<br />
4 Technical data ..................................................................................................14<br />
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IN COMMERCIAL CONFIDENCE<br />
OPTICAL AMPLIFIER UNIT<br />
Date: Doc. number: Rev: Page<br />
© Transmode 2009-11-30 <strong>TD</strong>-OA S 3 (15)<br />
1 GENERAL<br />
The specifications and information within this manual are subject to change without further<br />
notice. All statements, information and recommendations are believed to be accurate but<br />
are presented without warranty of any kind. Users must take full responsibility for their<br />
application of any products.<br />
In no event shall Transmode Systems AB be liable for any indirect, special, consequential<br />
or incidental damages, including, without limitation, lost profits or loss or damage to data<br />
arising from the use or inability to use this manual, even if Transmode or its suppliers have<br />
been advised of the possibility of such damages.<br />
1.1 In commercial confidence<br />
The manual is provided in commercial confidence and shall be treated as such.<br />
1.2 Document Revision History<br />
Revision Date Description of changes<br />
A 2002-12-02 Creation<br />
B 2003-03-17 Addition of dual OA Unit<br />
C 2003-06-28 Additional details on on-line vs off-line amplification.<br />
Optical parameter info in new table in section 4<br />
D 2004-03-21 Addition of 15dBm variants<br />
E 2004-10-11 R-state info added in chapter 4<br />
F 2005-06-30 - Transition to new Transmode format.<br />
- Introduction of new overlay with clarified text information.<br />
- Introduction of R1B version with new OA-modeling (A3.2)<br />
G 2005-08-24 Updated to include new OA settings<br />
H 2005-10-31 Addition of 17dBm OA’s (A4.0 content)<br />
I 2005-12-20 Removal of 17dBm Power amplifier. This configuration is<br />
now a SW parameter. Phase out of 15dBm OA’s<br />
J 2006-01-11 Clarifications on 17dBm amplifiers. Removal of chapter with<br />
commissioning instructions (only available in I&C manual).<br />
Added technical information.<br />
K 2006-04-20 Update of <strong>OA17</strong>C and <strong>OA17</strong>/17CC to R2B<br />
L 2006-06-20 - Addition of 20dBm OA’s<br />
- Corrected power dissipation values on 17dBm OA’s<br />
M 2006-08-01 -Technical Data table modified and completed with <strong>OA15</strong><br />
data<br />
N 2007-12-21 Updated with 10.0 content<br />
O 2008-02-11 Updated power consumption<br />
P 2008-03-14 Change of logotype<br />
Q 2009-02-10 New document front<br />
Added recommendation to not activate APS (chapter 2.6)<br />
R 2009-06-22 Updated Optical data settable gain.<br />
S 2009-11-30 Removal of irrelevant information. Enhanced description of<br />
different configurations. Addition of R14 content.<br />
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IN COMMERCIAL CONFIDENCE<br />
OPTICAL AMPLIFIER UNIT<br />
Date: Doc. number: Rev: Page<br />
© Transmode 2009-11-30 <strong>TD</strong>-OA S 4 (15)<br />
2 FUNCTIONAL DESCRIPTION<br />
2.1 General description<br />
Figure 1: General block diagram of OA units<br />
The Optical Amplifier Unit is used to amplify aggregated optical signals. The amplifier<br />
boards can be used in three applications:<br />
• As Pre amplifiers – To amplify wavelengths before they are connected to the receiver<br />
side of Transponders<br />
• As Power amplifiers – To amplify wavelengths out from Transponders to a high power<br />
level prior to transmission<br />
• As Line amplifiers – To amplify wavelengths at an intermediate site without electrical<br />
regeneration.<br />
The following EDFA amplifier types are currently provided:<br />
• 10dBm multi-purpose (single), Product ID: <strong>OA10</strong>C/FG (replaces <strong>OA10</strong>C)<br />
• 17dBm multi-purpose (single) , Product ID: <strong>OA17</strong>C<br />
• 17dBm multi-purpose (dual) , Product ID: OA2-17/17CC<br />
• 20dBm multi-purpose (single) , Product ID: <strong>OA20</strong>C<br />
• 20dBm multi-purpose (dual) , Product ID: OA2-20/20CC<br />
• 20dBm Opt Low Gain Amp C-Band (single); Product ID: <strong>OA20</strong>C/LG<br />
• 20dBm Opt Low Gain Amp C-Band (dual); Product ID: OA2-20/20/CC/LG<br />
All units are Class 1M products.<br />
The dual amplifiers have two separate EDFA functions. They can be used independently.<br />
The amplifiers have different gain values and gain characteristics. The selection of<br />
amplifier type is dependent on channel count and span distance.<br />
The 10dBm amplifier is primarily intended to be used as a pre-amplifier. The 17dBm and<br />
20dBm amplifiers can be used as power-, line- or pre-amplifiers. In some cases a 20dBm<br />
amplifier can be needed in one direction, but a 17dBm is enough in the other direction. For<br />
such situations it normally is better to select a double 20dBm amplifier unit from cost<br />
perspective.<br />
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IN COMMERCIAL CONFIDENCE<br />
OPTICAL AMPLIFIER UNIT<br />
Date: Doc. number: Rev: Page<br />
© Transmode 2009-11-30 <strong>TD</strong>-OA S 5 (15)<br />
Optical amplifiers are used to regain optical power and enable bridging of distances up the<br />
point where the chromatic dispersion sets the limit. Dispersion compensating devices<br />
(DCU’s) can then be introduced to extend the distance to the point where optical noise etc.<br />
have deteriorated the signal quality to a level where electrical regeneration is needed<br />
before bridging another segment.<br />
There are a number of other parameters that have to be taken into account when designing<br />
amplified networks. Some examples are:<br />
• Bit rate: The network must be designed for the highest bit rate. A link with a mix of<br />
10Gb/s and 2.5Gb/s wavelength channels will require a different configuration<br />
compared to a network with only 2.5Gb/s channels. The 10Gb/s channels will also<br />
restrict the maximum distance.<br />
• Line coding: Some transponders have FEC (Forward Error Correction) that will give<br />
3 to 5dB better power budget compared to transponders without FEC.<br />
• Dispersion properties: Some Transponders have “Long reach” lasers with better<br />
dispersion properties.<br />
• Optical noise tolerance (OSNR)<br />
• Number of channels: A network with max 16 channels will not have the same design<br />
solution as a network that needs to carry up to 32 channels.<br />
To conclude; amplified networks requires more technical skills to design compared to unamplified<br />
networks. In un-amplified networks all wavelengths are independent and it is<br />
mostly just a matter of making power budget calculations on a per wavelength basis.<br />
Designing amplified networks with line amplifiers requires that all wavelength channels<br />
must be taken into consideration. It is the “worst” wavelength channel that will define the<br />
complete network design. The placement of the amplifiers in the optical path can be done<br />
in two ways.<br />
• Off-line: Used in single-fiber configurations using a special AD-filter. The optical<br />
signal(s) are amplified before/after they have been added/dropped from the line fiber.<br />
The amplifier will thus operate on 1 or 2 wavelengths only. This is the normal setup<br />
used in p-t-p, bus and ring topologies where passive add/drop filters are used to<br />
add/extract wavelength channels. Amplifiers thus only need to be applied on those<br />
wavelengths that need amplification. No intermediate line amplifiers are possible to<br />
introduce in these configurations.<br />
• In-line: Used in fiber-pair and single-fiber configurations. This is the traditional<br />
placement where the amplifier is placed on the line fiber and thus operates on all<br />
wavelengths present on the line fiber. This setup is only used in p-t-p networks where<br />
optical MDU’s are used. Intermediate line amplifiers are possible to introduce in these<br />
configurations<br />
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Date: Doc. number: Rev: Page<br />
© Transmode 2009-11-30 <strong>TD</strong>-OA S 6 (15)<br />
2.2 Applications<br />
2.2.1 Off-line amplification on single-fiber<br />
When using AD-filters for single-fiber configurations (AD1AB/xxxxx, AD1BA/xxxxx,<br />
AD2AB/xxxxx, AD2BA/xxxxx, AD4AB/xxxxx, AD4BA/xxxxx), in-line amplification is not<br />
possible to establish. Instead, a special 2ch AD-filter (AD2OAAB/xxxxx, AD2OABA/xxxxx)<br />
is used enabling off-line amplification.<br />
This AD-filter has extra ports for connecting a Power (or Booster) amplifier and/or a Preamplifier.<br />
The wavelengths are thus amplified before and/or after they are add/dropped<br />
from the line fiber. A network can thus be a mix of standard AD-filters without off-line<br />
amplifiers and AD-filters enabling off-line amplification. Amplification can thus be added on<br />
wavelengths that require amplification.<br />
Figure 2 “Off line” amplification<br />
Figure 2 shows a configuration using the special 2ch AD-filter (AD2OAAB/xxxxx) having<br />
additional ports where a power amplifier and/or a pre-amplifier can be added “off-line” to<br />
amplify this wavelength channels.<br />
For further details on the AD2OAAB/xxxxx filters, see separate Technical Description within<br />
the System Manual.<br />
See “Dimensioning Guidelines” document within the System Manual for details on span<br />
lengths.<br />
See “OA Commissioning Guide” document within the System Manual for details amplified<br />
networks.<br />
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Date: Doc. number: Rev: Page<br />
© Transmode 2009-11-30 <strong>TD</strong>-OA S 7 (15)<br />
2.2.2 In-line amplification on fiber-pair<br />
Figure 3 “In-line” amplification example<br />
The above figure shows the traditional fiber-pair configuration where the amplifiers are<br />
placed “in-line” and consequently amplifies all wavelengths on the line fiber.<br />
An OSC channel is injected at the terminal nodes to enable management access to the<br />
intermediate line amplifier node.<br />
See “Dimensioning Guidelines” document within the System Manual for details on span<br />
lengths.<br />
See “OA Commissioning Guide” document within the System Manual for details amplified<br />
networks.<br />
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Date: Doc. number: Rev: Page<br />
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2.2.3 In-line amplification on single-fiber<br />
Figure 4 “In-line” amplification on single-fiber example<br />
The figure shows how an amplified link can be established on a single-fiber. MDU-E and<br />
MDU-T is used in transmit direction (east) while MDU8-T/EVEN-C and MDU8-E/EVEN-C<br />
are used in the receive direction (west). The optical interleaver is used to combine the two<br />
directions onto a single-fiber. The same interleaver type is used to separate the directions<br />
at the line amplifier site to enable amplification as well as combined the two after<br />
amplification.<br />
In-line amplification can thus be done also for single-fiber configurations.<br />
An OSC channel is injected using single-fiber CWDM AD-filters to enable remote<br />
management access to the line amplifier site.<br />
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© Transmode 2009-11-30 <strong>TD</strong>-OA S 9 (15)<br />
2.2.4 Line amplifier in a 1U chassis<br />
In R14 (Dec 2009) it is possible to insert an amplifier unit in a TM-101 or TM-102 chassis<br />
together with a 2ch VOA (VOA/2CH) as shown in the figure.<br />
Figure 5: Compact 1U Line Amplifier NE<br />
The 2ch VOA enables remote adjustment of the attenuation between two sites. This can be<br />
used to provide optimum working conditions for the EDFA amplifier and also to<br />
compensate for change in fiber attenuation due to e.g. a fiber splice.<br />
Note that this Line Amplifier NE has no OSC channels. Remote management access must<br />
consequently be done via a local DCN connection.<br />
I full-fledged line amplifier NE as shown in Figure 3 will require a TM-301 chassis.<br />
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2.3 Alarms<br />
Any generated alarms are collected by the Control Unit and accessible via the node<br />
manager TM-EMN or network manager Transmode TNM. The status LED (STS-LED) on<br />
the board front indicates the severity of the active alarms. See chapter 3.<br />
The generated alarms are shown in Operations & Maintenance volume of the System<br />
Manual, “Troubleshooting Guide”.<br />
2.4 Board data<br />
All boards/units within a TM Network Element have unit related information stored in nonvolatile<br />
memory banks. This information is stored at production and is required for<br />
administration and startup of the boards.<br />
The information is divided into three main groups:<br />
• Environmental data - Contains data, which is read and used without knowledge of<br />
production data version<br />
• Generic board data - Contains administrative data, which is included on all boards,<br />
both active and passive.<br />
• Specific board data - Data needed for proper board operation.<br />
Some alarms are based on the presence of this information:<br />
• “Vital Product Data Missing”: Information in the board data memory bank that is vital to<br />
manage the unit is missing. This alarm is classified as “major” and may require board<br />
replacement.<br />
• “Non-vital Product Data Missing”: Information in the board data memory bank that is<br />
not vital to manage the unit is missing. This alarm is classified as “minor”<br />
See System Manual Volume C, Operation & Maintenance for further details.<br />
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OPTICAL AMPLIFIER UNIT<br />
Date: Doc. number: Rev: Page<br />
© Transmode 2009-11-30 <strong>TD</strong>-OA S 11 (15)<br />
2.5 Remote inventory<br />
An on-board EE-PROM enables remote extraction of inventory data. The information<br />
provided is:<br />
• Unit name<br />
• Unit HW Product number<br />
• HW revision<br />
• Unit SW product number<br />
• SW revision<br />
• Unit Manufacturer<br />
• Unit serial number<br />
2.6 Consequent actions<br />
Figure 6: Consequent actions upon loss of input signal<br />
The OA units have an Automatic Power Shutdown (APS) feature. This is per default set in<br />
“disable” position. It is not recommended to activate APS on a network with multiple line<br />
amplifiers since there is risk for the link not to come up after a failure.<br />
APS shuts down output power when the input optical power is below a pre-defined level.<br />
When the input optical power rises above the pre-defined level, the Optical Amplifier is<br />
activated.<br />
2.7 Monitor point<br />
All amplifiers (except <strong>OA10</strong>C) have a monitor point corresponding to 1% of the output<br />
power, corresponding to 20dB lower than the output power.<br />
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© Transmode 2009-11-30 <strong>TD</strong>-OA S 12 (15)<br />
3 MECHANICAL LAYOUT<br />
3.1 Single OA’s<br />
All single OA units have the same mechanical solution. To identify units type, see label on<br />
top (Unit type) or on product label placed on upper handle.<br />
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3.2 Dual OA’s<br />
All dual OA units have the same mechanical solution. To identify units type, see label on<br />
top (Unit type) or on product label placed on upper handle.<br />
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© Transmode 2009-11-30 <strong>TD</strong>-OA S 14 (15)<br />
4 TECHNICAL DATA<br />
Table 1: Electrical data<br />
Parameter Unit max Comment<br />
Power consumption<br />
<strong>OA10</strong>FG<br />
<strong>OA15</strong><br />
<strong>OA15</strong>/15C<br />
<strong>OA17</strong>C<br />
OA2-17/17CC<br />
<strong>OA20</strong>C and <strong>OA20</strong>C/LG<br />
OA2-20/20/CC and OA2-20/20/CC/LG<br />
Table 2: Optical data<br />
W<br />
11<br />
4<br />
5<br />
11<br />
20<br />
14<br />
27<br />
Depending on operating mode and<br />
ambient temperature<br />
Parameter Unit <strong>OA10</strong> <strong>OA15</strong> <strong>OA20</strong><br />
Max output power dBm 9 15 19.5<br />
Min output power dBm -10 -10 -7<br />
Input power range ( LI- Low<br />
input range)<br />
dBm<br />
-43 to -13<br />
See Note<br />
-35 to +5<br />
See Note<br />
-35 to -5<br />
See note<br />
Input power range ( HI-<br />
High input range)<br />
Gain @ Optimum gain<br />
flatness<br />
dBm NA NA -25 to +8<br />
dB 13 NA<br />
Settable gain dB 5 – 30 5-30 13 – 30 in LI<br />
(23)<br />
26<br />
13-28 in HI<br />
Nose figure dB < 6.2
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Table 3: Revision data<br />
Product number Rev Release<br />
R1A A1.2 1 st released version.<br />
<strong>OA10</strong>C R1B<br />
A3.2<br />
HW-change to enable new OA modelling.<br />
New overlay,<br />
10.0 LTB set for FEB 2008<br />
R1A A2.0 1 st released version.<br />
New overlay. Corrected port numbering on<br />
<strong>OA10</strong>/10C R1B<br />
A3.2 overlay. HW-change to enable new OA<br />
modelling<br />
9.0 Terminated. No units delivered.<br />
R1A A2.2 1 st released version.<br />
<strong>OA15</strong>C<br />
R1B A3.2<br />
HW-change to enable new OA modelling.<br />
New overlay<br />
A4.1 Terminated<br />
R1A A2.2 1 st released version.<br />
HW-change to enable new OA modelling.<br />
<strong>OA15</strong>/15C<br />
R1B A3.2 New overlay. Corrected port numbering on<br />
overlay<br />
A4.1 Terminated<br />
R1A A4.0 1 st released version.<br />
<strong>OA17</strong>C<br />
R2A<br />
R2B<br />
A5.0 PCB corrections<br />
Introduction of temperature stabilized EDFA<br />
module<br />
R1A A4.0 1 st released version.<br />
OA2-17/17CC<br />
R2A<br />
R2B<br />
A5.0 PCB corrections<br />
Introduction of temperature stabilized EDFA<br />
module<br />
A4.0 1 st <strong>OA17</strong>POW R1A<br />
A4.1<br />
released version.<br />
Terminated<br />
<strong>OA20</strong>C R1A A6.0 1 st released version.<br />
OA2-20/20/CC R1A A6.0 1 st released version.<br />
<strong>OA10</strong>C/FG R1A 10.0 1 st released version<br />
<strong>OA20</strong>C/LG R1A 10.0 1 st released version<br />
OA2-20/20/CC/LG R1A 10.0 1 st released version<br />
Introduction of R-state R2B on 17dBm amplifiers<br />
In release A5.0 the R-state of the 17dBm amplifiers are increased to R2B due to<br />
introduction of a temperature stabilized EDFA module. This change is vendor induced to<br />
provide a more generic product.<br />
The R2B versions of the <strong>OA17</strong>C and OA2-17/17CC units are compatible with the previous<br />
revisions. That means that they can be used as spare part or replacement for each other.<br />
Since the temperature variations of the R2B version will be smaller than the previous<br />
versions, the alarm and warning thresholds must be adjusted to avoid unnecessary<br />
high/low temperature alarms.<br />
For <strong>OA17</strong>C R2A and OA2-17/17CC R2A:<br />
Set laserTempHighRelativeThreshold to +45.0°C<br />
Set laserTempLowRelativeThresld to –25 (-45.0)°C<br />
For <strong>OA17</strong>C R2B or later and OA2-17/17CC R2B or later:<br />
Set laserTempHighRelativeThresld to +1.0°C<br />
Set laserTempLowRelativeThresld to -1.0°C<br />
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