Understanding CWDM Networks - · PDF fileUnderstanding CWDM Networks Note:...

MUX/DEMUX OADM

Understanding CWDM Networks

Note: Speci�cations, terms and conditions are subject to change without notice.30162533 000 1008 CWDM.PO.FOP.TM.AE

Fiber Optic Test Solutions WaveReady Network Solutions

Network Element Parameters

Characteristics of CWDM

SMART Optical Handhelds

OADM UnitMUX/DEMUX Unit

OTDRT-BERD/MTS Optical Test Platforms Connector Inspection Scopes

CWDM Testing

Common CWDM Deployment Topologies

Attenuation Profile Optical Spectrum Channel Power Level andWavelength Verification

0.0

0.5

1.0

1.5

2.0

2.5

3.0

1300 1400 1500 1600

O-Band

1260-1360 nm

E-Band

1360-1460 nm

S-Band

1460-1530 nm

C-Band

1530- 1565 nm

L-Band

1565-1625 nm

Water Peak

ITU-T G.652 Fiber

Wavelength (nm)

Fib

er A

tten

uat

ion

(dB

/km

)

1 2 3 4 5 6

7 8

9 10

11 12 13 14 15 16 17

18

Parameters Unit ValuesCenter Wavelength nm ITU-T CWDM Wavelengths0.5 dB Pass Bandwidth nm ≥13Insertion Loss dB ≤3.5Adjacent Chanel Isolation dB ≥40Optical Return Loss dB ≥50PDL dB ≤0.1

1 2

λ1

3

Point to Multi-PointSONET/SDH

λ1

λ2

λ2

λn

λn

Ethernet

Fiber Channel

SONET/SDH

OADM OADM OADM

Ethernet Fiber Channel

λ1

λ2

λn

MU

X/D

EMU

X

MU

X/D

EMU

X2 2 2

Point to PointSONET/SDH

λ1

λ2

λn

Ethernet

Fiber Channel

λ1

λ2

λn

MU

X/D

EMU

X

MU

X/D

EMU

X

1

1

1

1SONET/SDH

SONET/SDH

Ethernet

Fiber Channel

Network Lifecycle Test Parameters Test Instruments Installation/ - Connector inspection and cleaning - Video Microscope and Cleaning Kit Fiber Qualification - Insertion loss at 1310/1550/1625 nm - Loss Test Set/OTDR - ORL measurement - ORL Meter/OTDR - Splice/Connector loss at 1310/1550/1625 nm - OTDR - Length - OTDR - Attenuation profile measurement (verify water peak width, identify fiber type) - Spectral Analyzer (OSA, WDM) (standards, low water peak) System Turn-up and - Connector inspection and cleaning - Video Microscope and Cleaning Kit Wavelength Provisioning - Channel power-level and wavelength verification - Channel Checker/OSA - Wavelength route testing (Loss, ORL) - CWDM OTDR - Transmitter/receiver power-level verification - Power Meter/Channel Checker Maintenance and - Connector inspection and cleaning - Video Microscope and Cleaning Kit Troubleshooting - Channel power-level and wavelength verification - Channel Checker/OSA - Transmitter/receiver power-level verification - Power Meter/Channel Checker - Failure localization per wavelength (loss) - CWDM OTDR - Channel wavelength/power drift testing - Channel Checker/OSA

Ethernet

Fiber Channel

OADM OADM

OADM

OADM

Core DWDMAccess

DataCenter

BusinessArea

Glossary CO Central Office CWDM Coarse Wavelength Division Multiplexing DEMUX Demultiplexer DFB Distributed Feedback DWDM Dense Wavelength Division Multiplexing MUX Multiplexer OADM Optical Add-Drop Multiplexer ORL Optical Return Loss OTDR Optical Time Domain Reflectometer PDL Polarization Dependent Loss

Parameters Unit ValuesCenter Wavelength nm ITU-T CWDM Wavelengths0.5 dB Pass Bandwidth nm ≥13Add/Drop Insertion Loss dB ≤1.5 (1 ch), 3 (4 ch)Pass thru insertion loss dB ≥1 dBOptical Return Loss dB ≥50PDL dB ≤0.1Adjacent Channel Isolation dB ≥40

Nominal central wavelengths (nm) 1 1271 2 1291 3 1311 4 1331 5 1351 6 1371 7 1391 8 1411 9 1431 10 1451 11 1471 12 1491 13 1511 14 1531 15 1551 16 1571 17 1591 18 1611

ITU-T Standards G.694.2: Spectral grids Provides the wavelength grid for for WDM applications; CWDM applications, which supports a CWDM wavelength grid channel spacing of 20 nm. G.695: Optical interfaces Applies to multiplexing applications for for CWDM applications: point-to-point links of up to 16 channels at 2.5 Gb/s. Signal transmission can be either unidirectional or bidirectional.

Key Feature CWDM Standards ITU-T G.694.2 / G.695 Operation Bands O, E, S, C, and L Bands (1271 to 1611 nm) Number of Wavelengths Up to 18 Wavelength Spacing 20 nm Wavelength Drift Tolerance ± 6.5 nm Applications Metro-Access, Regional Network, Private Data Network (up to 80 km)

ITU-T G.694.2 CWDM Grid

™

To learn more, visit www.jdsu.com/fibertest

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