4-Channel CWDM MUX/DEMUX for QSFP, Low Band 1270–1330 nm, Dual Fiber, LGX
The GLOBALfiber G-CMUX-04-2733-LU is a fully passive 4-channel CWDM MUX/DEMUX optimized for QSFP-based optics operating in the low CWDM band (1270–1330 nm).
Designed in a compact LGX plug-in format, this module supports dual-fiber point-to-point transmission, enabling efficient aggregation of multiple services without the need for additional fiber infrastructure.
An integrated expansion port allows future bandwidth growth by cascading with another CWDM MUX/DEMUX using different wavelengths—preserving fiber resources while scaling capacity.
Key Features
• 4-channel CWDM MUX/DEMUX for QSFP optics
• Low-band CWDM wavelengths (1270–1330 nm)
• Dual-fiber transmission (separate Tx/Rx fibers)
• Fully passive design – no power required
• Integrated expansion port for future capacity growth
• Compact LGX module, compatible with 1U racks
• Low insertion loss and high channel isolation
• LC connectors
Wavelength Configuration
• CWDM channels: 4 channels
• Wavelength range: 1270–1330 nm
• Channel spacing: 20 nm
• Channel passband: ±6.5 nm
Optical Technology
• Filter technology: TFF (Thin Film Filter)
Technical Specifications
• Insertion loss: = 1.5 dB
• Link loss (regular): = 6.2 dB
• Link loss (with 8 skip 0): = 4.0 dB
• Insertion loss @ 1% MON port: = 26 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
Channel Isolation
• Adjacent channels: = 30 dB
• Non-adjacent channels: = 45 dB
Environmental & Mechanical Specifications
• 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: 0.5 kg
• Connectors: LC
Typical Applications
• QSFP-based CWDM aggregation
• Fiber-scarce access and metro networks
• Data center interconnect (DCI) edge links
• Broadcast, cloud, finance, and public infrastructure