Canary CN-1037B 用户手册
39
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.