Ratio Coupler Insertion Loss Chart..!

The chart given below shows the general attenuation loss for common ratio Couplers in FTTH.

Type Of Coupler	Split Ratio	Insertion Loss
1x2	50:50	3.2/3.2
1x2	45:55	3.7/2.8
1x2	40:60	4.2/2.4
1x2	35:65	4.8/2.1
1x2	30:70	5.4/1.8
1x2	25:75	6.2/1.5
1x2	15:85	8.4/0.91
1x2	10:90	10/0.66
1x2	5:95	13/0.42
1x2	2:98	17/0.29
1x2	1:99	20/0.24
1x3	10:45:45	10/3.7/3.7
1x3	20:40:40	7.2/4.2/4.2
1x3	20:40:40	7.2/4.2/4.2
1x3	30:35:35	5.4/4.8/4.8
1x3	40:30:30	4.2/5.4/5.4
1x3	50:25:25	3.2/6.2/6.2
1x3	60:20:20	2.4/7.2/7.2
1x3	70:15:15	1.8/8.4/8.4
1x3	80:10:10	1.2/10/10
1x4	25:25:25:25	6.2/6.2/6.2/6.2