Dense Wavelength Division Multiplexing (DWDM)

Neptec’s Dense Wavelength Division Multiplexing (DWDM) products and solutions are used to increase bandwidth over existing fiber networks. DWDM combines and transmits multiple signals simultaneously using multiple wavelengths through the same fiber. Neptec’s line of DWDM products are designed to be reliable and cost-effective while maintaining the flexibility needed in any network.

Every network is different. Neptec ensures that every product we sell is highly customizable to fit any optical fiber application. If the standard DWDM products below do not fit your application, we would be glad to review your specifications and quote a custom DWDM for you.

Product Information

Key Features

• High Isolation and Low Insertion Loss
• Bidirectional
• High Reliability and Stability


• Telecommunications
• Datacommunications
• Train and Metro networks
• Add/Drop Multiplexing



Parameter Unit Typical Notes
Operating Signal Wavelength C-band or L-Band
Central Wavelength THz 186.6 to 196.1 ITU Channels
Pass Band Width GHz ≥12.5
Insertion Loss (Transmission) dB ≤1.1
Insertion Loss (Reflection) dB ≤0.4
Pass Band ripple dB ≤0.4
Directivity dB ≥50
Return Loss dB ≥45
Polarization Dependent Loss dB 0.2
PMD ps 0.2

Electrical and Environmental Characteristics

Parameter Unit Typical Notes
Operating Temperature Range ◦C (-5) to 85
Storage Temperature Range ◦C (-40) to 85