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700-0023-05-00 Rev. 1
© 2013 Cyan, Inc. – All Rights Reserved.
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145
Chapter 3:
Optical Link Design
This section describes optical link design for the Cyan Z-Series LAD modules.
In This Chapter
DWDM XFP Specifications with GFEC ............................................... 145
Dispersion Compensation Modules ....................................................... 151
3.1 DWDM XFP Specifications with GFEC
The following is the list of typical 80 km DWDM XFP specifications with OTU2 Generic Forward Error
Correction (GFEC) functionality. The error correction provided by GFEC improves minimum Rx
sensitivity by 3 dB, to -27 dBm from -24 dBm.
Parameter
Max
Min
Notes
Transmit Power (TXP)
+3 dBm
-1 dBm
Rx Sensitivity (RXP)
-7 dBm
-27 dBm
@ 10e-12 BER
Power Penalty (Po)
3 dB
@ 80 km
Attenuation
23 dB
10 dB
Approximate Distance
80 km
Max Attenuation = TXP (min) – RXP (min) – Po
Min Attenuation = TXP (max) – RXP (max)
Approximate Distance = Max Attenuation / 0.2875 dB/km
Note: This section assumes the use of Cyan standard 80 km DWDM XFP transceivers in all cases.