Table 6.

Insertion loss of the coupler 99:1 measured with OTDR method.

Port IN	Port OUT	IL from Datasheet (dB)	IL at 1310 nm (dB)	IL at 1550 nm (dB)
P1	P3	20.47	18.35	15.90
P1	P4	0.37	0.37	0.28
P2	P3	0.33	0.39	0.36
P2	P4	20.43	18.31	15.35