Hi Readers,
I continue My previous blog
Let's First I tell you about Low Water Peak (LWP) & Polarised
Mode Dispersion (PMD)
Low Water Peak (LWP): - In production of Fiber Optics used
optic Material Low Water peak Value is added for cause of Attenuation & Dispersion
in propagate wavelength.
Polarised Mode Dispersion (PMD):- After Propagate wavelength
From Transmitter of Fiber Optics, The Light wave which converted Electromagnet
to Light wave Travel through Fiber optics Attenuation & Dispersion occurs
due to two Orthogonal Polarised Mode.
So above these two categories ITU-T Create Different
Categories of G.652 Fiber. Presently There are four Categories A, B, C, D (G.652A,
G.652B, G.652C, G.652D)
Below Table Shows:-
Where PMDQ link design value Specification and Water peak is
Specified (LWP) or Not Specified (WPNS)
|
Category
|
Maximum PMDQ (ps/km 1/2)
|
Water Peak
|
|
A
|
0.5
|
WPNS
|
|
B
|
0.2
|
WPNS
|
|
C
|
0.5
|
LWP
|
|
D
|
0.2
|
LWP
|
Thankyou
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