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Fiber and Connector Losses in Raman Link Configuration
This document provides important guidelines to be followed when configuring a Raman link regardless of whether you are configuring the Raman link using the Raman installation wizard or the Cisco Transport Planner (CTP) XML file. Ensuring the desired gain and gain flatness is critical to the success of the configuration.
The Raman installation wizard automatically addresses any deviation in connector and fiber splice loss values by displaying warning messages appropriately, provided they are within the limits detailed in Table 1. However, configuration of the Raman link using the CTP XML file is based on the algorithms within CTP. Any deviation in the connector and fiber splice losses values leads to unpredictable behavior of the entire system, in terms of Raman tilt and optical signal-to-noise ratio (OSNR). For these reasons, configuring the Raman link using the Raman installation wizard is preferred than configuring using the CTP XML file.
Table 1 contains the following fields:
- Fiber type—The various fiber types used are:
- Target Gain—Expected Raman gain.
- Minimum Span [dB]-For the Raman link configuration to be successful, the span loss should be equal or greater than the value shown in Table 1.
- Limit for Connector Losses—Connector losses values that must not exceed for configuration to be successful.
- Limit for Connector Losses
- Additional References
- Trademark Notice
- Obtaining Documentation and Submitting a Service Request
Limit for Connector Losses
NoteTable 1 shows values that were estimated under ideal test condition and may differ depending on the actual fiber type used, distance, etc.
Table 1 Limit for Connector Losses Conditions
Fiber Type
Minimum Span Loss [dB]
Target Gain [dB]
Limit for Connector Losses (dB)
OPT-RAMP-C
OPT-RAMP-CE
Min
Max
No splice loss
SMF
21
15
7
8.5
1.6
ELEAF
21
15
7
10
1.3
TW-RS
24
18
9
13.5
1.1
Splice 0.1 dB every 2 km or 0.2 dB splice every 4 km
SMF
21
15
7
8.5
0.7
ELEAF
21
15
7
10
0.5
TW-RS
24
18
9
13.5
0.2
Splice 0.1 dB every 4 km
SMF
21
15
7
8.5
1.2
ELEAF
21
15
7
10
0.9
TW-RS
24
18
9
13.5
0.6
Additional References
Related Documents
Use this document in conjunction with the other release-specific documentation listed in the following pages:
Link Description Provides quick access to publications of Cisco ONS releases.
Provides background and reference material, procedures for installation, turn up, provisioning, and maintenance of Cisco ONS 15454, Cisco ONS 15454 M2, and Cisco ONS 15454 M6 dense wavelength division multiplexing (DWDM) systems.
Provides general troubleshooting instructions, alarm troubleshooting instructions, and a list of error messages that apply to the Cisco ONS 15454, Cisco ONS 15454 M2, and Cisco ONS 15454 M6 dense wavelength division multiplexing (DWDM) systems.
Release Notes for Cisco ONS 15454, ONS 15454 M2, and ONS 15454 M6 DWDM
Provides information about new features and enhancements for the Cisco ONS 15454, Cisco ONS 15454 M2, and Cisco ONS 15454 M6 DWDM platforms.
Technical Assistance
Link Description The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies.
To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds.
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Trademark Notice
Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: http://www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
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