18-channel CWDM, SM, 1270-1610, SC/PC

DESCRIPTION
CWDM may be delivered in several types of panels and boxes from FOSS.  
The most common are:

• FPM76-modular panel   
• FP65-1U panel
• FPD76- wall box DIN  

May also be delivered in most splice closures.  

They are based on reliable passive technology and are delivered with SC or LC interface with PC or APC polished connectors. 

SYSTEM DESCRIPTION
Passive CWDM units are a reliable and reasonable method for transferring several wavelengths/signals over the same fibre (wavelength multiplexing). In this way you may increase the capacity of existing fibre-cable significantly. Combined with OADM you may add or drop wavelengths on the way between the end points. A big advantage of using passive wavelength multiplexing is also that the method is protocol– and bitrate independent.  

A complete system with components for two-way communication (multiplexer and de-multiplexer) in both ends are made using two units. 

SPECIFICATIONS

Operating temperature: -40 °C to 85 °C

Insertion loss*:  
4 channel/2xUpgrade:       < 3.4/3.4 dB       < 2.9/2.9 dB typically  
8 channel:                          < 3.6 dB             < 3.0 dB typically  
8L(lower band):                  < 3.8 dB             < 3.1 dB typically  
8 channel/WB:                   < 3.6/3.6 dB       < 3.0/3.0 dB typically  
8 channel/WB + Monitor:   < 4.1/4.1 dB       < 3.5/3.5 dB typically  
18 channel:                        < 4.6 dB             < 4.0 dB typically  
8-channel/WB (3-port):      < 4.6/5.6 dB       < 4.0/4.5 dB typically
* Loss over a system (2 panels and 4 connector-pairs)  

Wavelength (according to ITU-T G.694.2) :
4 channel: 1471, 1491, 1591, 1611  
8 channel: 1471, 1491, 1511, 1531, 1551, 1571, 1591, 1611 or   1271, 1291, 1311, 1331, 1351, 1371, 1431, 1451 nm    
18 channel: 1271, 1291, 1311, 1331, 1351, 1371, 1391, 1411, 1431, 1451, 1471, 1491, 1511, 1531, 1551, 1571, 1591 and 1611 nm  

Pass band:
CWDM channels: +/- 6.5 nm  
1310 nm: +/- 50 nm  
Upgrade 1/WB: 1260-1458 nm  
Upgrade 2: 1504-1577 nm

Monitor output (where available): ca. 20 dB below the line signal (1%)