Datasheet

35
Coarse Wavelength Division Multiplexing
Optical Insertion Losses
Optical Insertion Loss estimation:
• Example 4 of Return-path (link) Loss calculation between one
intermediate OADM (client Drop, Add and Pass-Thru) stage and
the Origin – assumes one λ per Drop point.
• Calculates typical and maximum Return-path Losses from one
OADM (client Add/Drop-point) to Origin.
Table (C-4)
Insertion Loss: Each Insertion Insertion Insertion Acc. Loss Insertion Insertion Insertion Acc. Loss at Total Loss at start-
Mux + De-Mux stage Loss (1st) Loss (1st) Loss (1st) at (1st) Loss (2nd) Loss (2nd) Loss (2nd) (2nd) Drop point Demux w/ one
(typically at segment Drop point Add point Pass-Thru Drop point Drop point Add point Pass-Thru point Add (return) stage &
end-points) no Pass-Thru stage
(M
O
& D
O
) (M
R
& D
R
) (C) (B) (E) (M
O
+ C) (B + D
O
)
1.2 dB 1.2 dB 1.0 dB 1.0 dB 0.5 dB 2.2 dB None: None: None: None: 2.2 dB
(Typical Optical Loss) No OADM No OADM No OADM No OADM
2.4 dB 2.4 dB 1.4 dB 1.4 dB 1.0 dB 3.8 dB None: None: None: None: 3.8 dB
(Maximum Optical Loss) No OADM No OADM No OADM No OADM
• Given: Origin Multiplexer/De-Multiplexer (CM-4MD6-A) losses
(M
O
& D
O
) plus one OADM point losses (C, B, E) in the optical
path. The Remote site (Mux/De-Mux) is ignored for this
calculation example.