1- what's the need for DWDM ?
Increase data rates , capacity
Provide long distance Transmission
Transparent Transmission
High performance to cost ratio.
2- what's the frequency range for DWDM ?
C band
From 192 to 916 thz
From 1525 to 1565 nanometer.
3- what is the standard fiber used with DWDM ?
ITU G652 and G655
The G652 used because it has the advantage of eliminate four wave mixing.
4- what's the type of fiber optic losses ?
Attenuation , Dispersion , insertion loss , retern loss , splice loss
Add Dispersion compensation modules.
6- what's the types of optical multiplexer ?
40 , 48 and 80 wavelength
7- what's the types of add drop multiplexer ?
Fixed and reconfigurable
8- What's types of optical fiber ?
SM , MM
Step index , graded index
Armored , unarmored
Out door , indoor
