The document summarizes power values in a passive optical network with one erbium-doped fiber amplifier (EDFA) before the optical line terminal (OLT) over a 15 km span. An optical transmitter outputs 0 dBm which is amplified by the EDFA to +20 dBm. The OLT then transmits at +15 dBm which is split across 16 ports by a 1:64 splitter, resulting in -21 dBm of power at each optical network terminal (ONT). With fiber span losses of 3.5 dB, the total power at each ONT is around -7.5 dBm.

1. Figure (A):PowerValueswithone EDFA before OLTwithaSpan of 15 Km’s.
Head End
(47MHz –860 MHz ) RF out
Optical
Transmitter
1550nm
Optical Out 0 dBm
EDFA 1(Eribium
Doped Fiber
Amplification)
+
2
0
d
B
m
OLT 16 PON with
Transmit Power
+15 dBm
=15 dB + 16.5dB/16=16dBmSplitter
(1:64)
-21dBm
-5dBm
ONT Client
(-7.5dBm)
Total PoweratONT = -5.5dB +
(0.21*0.8+.02*8+0.5*2)dB= -7.5dBm.
15 Km SpanwithLoss
3.5dBm