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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