The GLOBALfiber G-CMUX-08-2745-LU is a fully passive 8-channel CWDM MUX/DEMUX designed for dual-fiber point-to-point transmission in the low CWDM band. Covering wavelengths from 1270 nm to 1450 nm, while skipping 1390 nm and 1410 nm, this module enables efficient aggregation of multiple services with minimal optical loss. Its compact LGX plug-in format allows easy installation in standard 1U racks, and an integrated expansion port supports future bandwidth growth without the need for additional fibers. This solution is widely used in telecom networks, data centers, broadcast & TV, cloud infrastructure, finance, and government environments, especially where fiber resources are limited.

• 8-channel CWDM MUX/DEMUX

• Low-band CWDM wavelengths (1270–1450 nm)

(1390 nm and 1410 nm skipped)

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

• Fully passive design – no power required

• Integrated expansion port for future capacity scaling

• Compact LGX module, compatible with 1U racks

• Low insertion loss and high channel isolation

• LC connectors

• CWDM channels (8):

o 1270 nm

o 1290 nm

o 1310 nm

o 1330 nm

o 1350 nm

o 1370 nm

o 1430 nm

o 1450 nm

• Channel spacing: 20 nm

• Channel passband: ±6.5 nm

• Filter technology: TFF (Thin Film Filter)

• Insertion loss: = 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): 190 × 200 × 39 mm

• Net weight (LGX): 0.5 kg

• Rack option: 2-slot 1U rack (2.5 kg)

• Connectors: LC

• CWDM aggregation in access and metro networks

• Fiber-scarce point-to-point links

• Data center edge and inter-site connectivity

• Broadcast, cloud, finance, and public infrastructure

• Scalable CWDM deployments with future expansion