Zte Unitrans ZXMP M600 Technical Instructions page 67

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A.3 Working Wavelength
1.
2.
The working principle of WDM is to multiplex multiple optical channel signals
into one fiber for transmission and implement the reverse process. Therefore, to
allocate channels efficiently in a limited wavelength area, improve the
bandwidth utility and reduce the non-linear effects between adjacent channels,
the working wavelengths of the multiplex optical channel signals should be
specified strictly.
DWDM system
As EDFA is used to amplify optical signals, the working wavelength range is
restricted by the amplification range of EDFA, which is 1530nm~1565nm.
However. According to ITU-T Recommendation G.692, the working wavelength
range of the DWDM system is 1528.77nm~1560.61nm and the corresponding
working frequency range is 196.1THz~192.1THz.
CWDM system
In the CWDM system, EDFA technique is not used as the transmission distance
is relatively short. The working wavelength range of the CWDM system is
determined by the fibers used. If ordinary fibers, that is, G.652 A&B fibers are
adopted, the working wavelength range is 1471nm~1611nm. If G.652 C&D
full-wave optical fibers are adopted, the working wavelength range is
1271nm~1611nm.
A-3
Appendix A Term Description