Extended Wavelength Independent Couplers (EIC) are passive
optical devices which allow the distribution and combination
of optical signals of a broad wavelength range. In difference to
the established couplers of the WIC type EIC are designed for
using additional wavelengths in the third optical window.
The couplers are manufactured on the basis of an advanced
Fused Biconcal Taper (FBT) technology to provide optimum
performance and longtime stability.
Features
■ Low insertion loss and extremely low excess loss
■ Free choice of coupling ratio, e.g. as tap coupler with a
coupling ratio of 1% or as symmetrical coupler with coup-
ling ratio of 50%
■ High return loss, i.e. no reflections interfering with the
transmitter in analogue systems
■ High thermal, mechanical and enviromental stability to
meet the requirements of Telcordia GR-1209 and GR1221
■ Option of manufacture to customer specifications
Applications
■ Public and private fibre-optic networks
■ Measurement systems and test equipment
■ Optical transmission and monitoring systems
Designs
■ Supplied in various housing sizes with bare fibre pigtails,
loose buffered tube pigtails or reinforced cable pigtails
■ Couplers with more than two outlets are available as truely
fused components with up to four fibres or as coupler
modules
■ All connector standard types are available
For a list of all models including dimensional specifications
see the data sheets Coupler Models; Overview of Short and
Standard Versions.
For check lists and additional ordering information for our pro-
ducts visit our website or see separate data sheets.
For a
complete overview of components visit our website at www.foc-fo.com.
Components ►Couplers► Singlemode Couplers ►
SM Power Splitters►
Extended Wavelength Independent Coupler (EIC)
For the extended wavelength range 1310 ±50nm and 1550+50/-100nm
Wavelength dependence from Coupling Ratio of a symme-
trical coupler EIC
1200 1300 1400 1500 1600 1700nm
% 100
90
80
70
60
50
40
30
20
10
0
FOC – fibre optical components GmbH
Barbara-McClintock-Str. 5 I 12489 Berlin, Germany
p +49 30 565507-0 I f +49 30 565507-19
w www.foc-fo.com I e info@foc-fo.de
Release 22.04.2020
Subject to modifications
DBE-COM-0048V004
Page 1 of 2
FOC Extended Wavelength Indipendent Coupler (EIC)
Wavelength [nm] 1310 ±50 and 1550 +50/-100
Output port
O
1
O
2
Max. Insertion Loss [dB] with Coupling Ratio 50/50 % 4,0 4,0
60/40 % 3,0 5,2
67/33 % 2,5 6,2
70/30 % 2,2 6,8
80/20 % 1,5 9,0
90/10 % 0,9 12,8
95/05 % 0,6 16,6
99/01 % 0,4 24,5
Min. Directivity [dB] 55 for 1x 2, 60 for 2x 2
Min. Return Loss [dB] 55 for 1x 2, 60 for 2x 2
Polarisation Dependent Loss
(1,2)
[dB] typical 0,05
(1)
maximum 0,1 dB for port
O
1, maximum 0,2dB for port
O
2, for symmetrical couplers
(2)
measured at 1310nm and 1550nm
Optical parameter for 1x 2 and 2 x 2 configurations
Wavelength [nm] 1310 ±50 and 1550 +50/-100
Output port O 1 O 2 O 3
Max. Insertion Loss [dB] with power splitting 90/05/05 % 0,9 17,4 17,4
80/10/10 % 1,6 13,0 13,0
70/15/15 % 2,3 10,9 10,9
60/20/20 % 3,0 9,1 9,1
50/25/25 % 4,0 7,8 7,8
40/30/30 % 5,1 6,7 6,7
33/33/33 % 6,2 6,2 6,2
30/35/35 % 6,7 5,8 5,8
20/40/40 % 9,1 5,1 5,1
10/45/45 % 15,0 4,5 4,5
Min. Directivity [dB] 55
Min. Return Loss [dB] 55
Polarisation Dependent Loss
(1,2)
[dB] typical 0,05
(1)
maximum 0,1 dB for port
O
1, maximum 0,2dB for port
O
2 and for port
O
3, for symmetrical couplers
(2)
measured at 1310nm and 1550nm
Wavelength [nm] 1310 ±50 and 1550 +50/-100
Output port
O
1
O
2
O
3
O
4
Max. Insertion Loss [dB] with equal power splitting 7,6 7,6 7,6 7,6
Min. Directivity [dB] 55
Min. Return Loss [dB] 55
Polarisation Dependent Loss
(1,2)
[dB] typical 0,25
(1)
maximum 0,5 dB
(2)
measured at 1310nm and 1550nm
Optical parameter for 1x 3 configurations
Optical parameter for 1x 4 configurations