20+2 Channel Single Fiber DWDM MUX/DEMUX, C-Band C21–C60 + O-Band (4 Channels), 1U Rack
The GLOBALfiber G-DMUX-O4C20-MLU is a fully passive single-fiber DWDM MUX/DEMUX designed to combine 20 C-Band DWDM channels with 4 additional O-Band wavelengths in a single optical fiber.
By supporting 20+2 services (24 wavelengths total) in bidirectional point-to-point transmission, this solution maximizes fiber utilization and enables the coexistence of traditional C-Band DWDM traffic and O-Band services such as aggregation, access, or special-purpose links.
The device is optimized for environments with limited fiber availability and is widely deployed in telecom networks, data centers, broadcast & TV, cloud infrastructure, finance, and government networks.
Key Features
• Single-fiber bidirectional DWDM transmission
• 20 C-Band DWDM channels (C21–C60)
• 4 O-Band wavelengths integrated in the same platform
• Supports 20+2 independent services on one fiber
• Fully passive design – no power required
• High channel isolation and stable wavelength accuracy
• Compact 19” 1U rack-mount chassis
• A-Side configuration (paired with B-Side unit)
Wavelength Configuration
C-Band DWDM
• Channels: C21–C60
• Total wavelengths: 40 waves
• Channel spacing: 100 GHz (0.8 nm)
O-Band DWDM
• Wavelengths:
o 1300.05 nm
o 1302.31 nm
o 1304.58 nm
o 1306.85 nm
Optical Technology
• C-Band technology: AAWG (Gaussian)
• O-Band technology: TFF (Thin Film Filter)
Technical Specifications
• Insertion loss (DWDM): = 5.0 dB
• Line loss: < 10 dB
• Insertion loss @ 1% MON port: = 26 dB
• Channel passband: ±0.11 nm
• Passband ripple: = 0.5 dB
• Center wavelength accuracy: ±0.05 nm
• Return loss: = 40 dB
• Directivity: = 40 dB
• Polarization mode dispersion (PMD): = 0.1 ps
• Polarization dependent loss (PDL): = 0.3 dB
Channel Isolation
• Adjacent channels: = 25 dB
• Non-adjacent channels: = 30 dB
Environmental & Mechanical Specifications
• Operating temperature: –5°C to +65°C
• Storage temperature: –40°C to +85°C
• Dimensions (H × W × D): 44 × 440 × 230 mm
• Net weight: 3.5 kg
• Mounting: 19” 1U rack
• Fiber type: Single fiber, bidirectional