2Ch CWDM Add/Drop OADM unit

Lightem CWDM Optical Add/Drop (OADM) is designed to optically add/drop one or multiple CWDM channels into one or two fibers. Available in Standalone, 19″ Rack Mount or LGX module packaging. Optional wide band port for existing 1310nm or 1550nm port is available to multiplex with these CWDM Channels, fully utilise with the existing equipments. Together with our CWDM Transceiver series or the wavelength converter series, the bandwidth of the fiber can be utilized in a cost effective way.
Whether your network has 1 or 2 cores of fiber, redundant network, ring or linear network design etc, we can offer various OADM configurations to tailor fit your network architect. Please contact us for more details.


  • Coarse WDM (CWDM) ITUT G.692.4
  • Custom design based on your requirements
  • Standard 1, 2, 4 and 8Ch system
  • Protocol transparent, support 1G, 10G etc
  • Choice of SC, LC or other connectors
  • Designed for ring, linear add/drop application.
  • Single or dual fiber backbone.
  • Optional redundant add/drop ports for extra assurance.
  • Rackmount or modular packaging.
Parameter Unit 2Channels
Center Wavelength nm 1271, 1291, 1311, … 1611
Channel Spacing nm 20
Bandwidth @ 3dB dB >14
Passband nm λ±6.5
Passband flatness nm <0.4
IL(In→Drop@λ drop) dB < 0.9
IL(Add→Out@λ add) dB < 0.9
IL (In→Out@other λ) dB < 1.2
Adjacent channel isolation dB > 30
Non adjacent isolation dB > 40
Isolation (InOut@λ drop) dB > 25
Wavelength thermal stability nm/°C < 0.002
Insertion loss thermal stability dB/°C < 0.006
PDL dB < 0.15
PMD dB < 0.1
Return Loss dB > 45
Operating temperature °C -5 ~ +65
Storage temperature °C -40 ~ +85
  XX – start wavelength CU – SC/UPC S – Simplex S- Standard 19RM- 19″ Rackmount 1U unit M- Monitor line port, 2%
  YY – end wavelength CA – SC/APC D – Duplex R- Redundant LGM- Module type
  eg 5557 LU- LC/UPC C- CWDM upgrade
1550-1570nm LA – LC/APC D- DWDM upgrade