The GLOBALfiber G-COADM-4-LU-xxxx is a fully passive 4-channel CWDM Optical Add/Drop Multiplexer (OADM) designed for east–west CWDM network architectures. It enables dropping and adding four CWDM channels to the west and four CWDM channels to the east, allowing flexible node insertion in linear or ring topologies while maintaining uninterrupted through traffic. Built in a compact LGX plug-in format with dual-fiber transmission, this OADM is ideal for metro access, aggregation, and distribution networks where fiber resources are limited and incremental expansion is required.

• 4-channel CWDM OADM (Add/Drop Multiplexer)

• East–West architecture for directional add/drop

• Dual-fiber transmission (separate Tx/Rx fibers)

• Fully passive design – no power required

• Low insertion loss on add/drop and line paths

• Compact LGX module, compatible with 2-slot 1U racks

• High channel isolation and optical stability

• LC connectors

• CWDM channels: 4 channels per node

• Channel spacing: 20 nm

• Channel passband: ±6.5 nm

• Operating wavelength range: 1270–1610 nm

(Specific channel combinations vary by part number – see Ordering Information.)

• Filter technology: TFF (Thin Film Filter)

• Insertion loss (drop/add to west or east): = 1.5 dB

• Insertion loss (west ? east line pass): = 2.4 dB

• Center wavelength accuracy: ±0.05 nm

• Return loss: = 45 dB

• Directivity: = 45 dB

• Polarization mode dispersion (PMD): = 0.1 ps

• Polarization dependent loss (PDL): = 0.3 dB

• Adjacent channels: = 30 dB

• Non-adjacent channels: = 45 dB

• Operating temperature: –40 °C to +85 °C

• Storage temperature: –40 °C to +85 °C

• Module format: LGX

• Dimensions (H × W × D): 220 × 200 × 39 mm

• Net weight (LGX): 0.5 kg

• Mounting: Plug-in LGX, compatible with 2-slot 1U rack

• Connectors: LC

• CWDM metro and access networks

• Linear and ring CWDM topologies

• Incremental network expansion using OADM nodes

• Fiber-scarce aggregation and distribution networks

• Broadcast, cloud, finance, and public infrastructure