WDM, CWDM & DWDM Multiplexers

The ViaLite range of WDM, CWDM and DWDM products allow multiple channels – traveling in either direction – to be simultaneously combined over a single fiber.  This means signals can be multiplexed into existing infrastructure or the number of dark fibers being leased can be reduced; lowering costs.

ViaLiteHD CWDM/DWDM multiplexers and de-multiplexers are available in 8 to 64-way variants and boast low insertion loss. They can be used as part of a Ka-Band diversity system, long distance system or as a stand-alone product.

  • CWDM Mux/De-Mux: 8 & 16 way
  • DWDM Mux/De-Mux: 8, 16, 32, 64 way
  • Channels can be customer specific
  • Compatible with any RF frequency
  • 1U/2U rack chassis
  • 5-year warranty

Products are available from 1310 nm/1550 nm WDM, ITU compliant 16 channel CWDM and up to 96 way ITU 50 or 100 MHz spacing DWDM compliant Multiplexers and Demultiplexers.

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WDM, CWDM & DWDM Multiplexers

ViaLite Multiplexers are based on thin film filtering and metal sealing technology. This gives a flat channel bandwidth response, flexible channel configuration and low insertion loss with high isolation. The system also has a flexible channel configuration and modularised design, making it convenient for system upgrades and expansions.

High-isolation variants are available which feature exceptional adjacent optical channel isolation.  These are specifically designed to complement the wide-dynamic range of ViaLite‘s fiber optic links.

For complex RF over fiber systems incorporating DWDM products, we recommend the use of the ViaLite System Designer tool.

Wavelength division multiplexing (WDM)

The WDM 2-channel Duplexers are available in either pigtail or plug-in module format, allowing original equipment manufacturers (OEMs) to build them into larger systems or for them to be rack mounted in a ViaLite chassis with other modules.

  • Allows 2 signals to be multiplexed
  • Uni- or bi-directional
  • Utilizes 1310 and 1550 nm lasers
  • Ideal for L-Band HTS and Reference or Tx/Rx in a single fiber, in satcom and diverse antennas within broadcast applications
  • High isolation between channels (90 dB RF)


Course Wavelength Division Multiplexing (CWDM)

The CWDM 4 and 8-channel systems are available in compact 1U high 19″ rack format.

  • 4-16 channels
  • Uni- or bi-directional
  • RF and data on a single strand of fiber
  • Reduces the number of leased fibers required – by up to 16 times
  • High isolation between channels (100 dB RF)

CWDM diagram

Dense Wavelength Division Multiplexing (DWDM)

The DWDM 4, 8 and 16-way systems are available in compact 1U high 19″ rack format or as a Purple OEM module. Up to 96 channels are available.

  • 4-96  channels
  • Uni- or bi-directional
  • RF and data on a single strand of fiber
  • Reduces the number of leased fibers required – by up to 96 times
  • Can be part of ViaLite’s Long Distance Link
  • High isolation between channels

DWDM diagram


You may also be interested in our Optical Multiplexing Guide.


  • Fixed satcom teleports
  • Ka-Band diversity systems
  • L-Band medium and long distance links
  • Oil and gas platforms
  • Networks with limited fiber availability

DWDM – Mux/De-Mux

DWDM – Mux / De-Mux
Part NumberHRM-D-60-8T-ZZ-D016-BA
Operational Wavelength1528.77 nm – 1563.86 nm
1569.59 nm – 1604.03 nm
Operational Centre WavelengthITU Grid 100GHz
Center Wavelength accuracy+/- 0.03 nm
Channel Spacing100 GHz
Channel Passband (@ -0.5dB Bandwidth)ITU +/- 0.11
PMD (Polarization Mode Dispersion)<0.1ps
Bandpass Insertion Loss<3.0 dB 8 Way
<5.2 dB 16 Way
<10.0dB 32 Way
Isolation optical non-adjacent channels>35 dB
Isolation optical adjacent channels>25 dB
Directivity>50 dB
Return Loss>50 dB
Fiber TypeSMF-28e with 0.9mm Loose Tube
Operating Temperature0 °C to + 70 °C
Storage temperature range-40 °C to +85 °C


Passive Optical Network Components Optical Performance Characteristics


Optical Splitters (50:50 split ratio)

1550 Channel Wavelength1528nm1563nm
1310 Channel Wavelength1295nm1325nm
Max Power Handling4W4W
Return Loss/ Directivity55dB55dB
Insertion Loss2.8dB3.2dB


1550 Channel Wavelength1550 ± 20nm1550 ± 20nm
1310 Channel Wavelength1310 ± 20nm1310 ± 20nm
Max Power Handling100mW b
Pass Band Ripple0.4dB
Insertion Loss1.5dB


Centre Wavelengthas per ITU G.694.2as per ITU G.694.2
Max Power Handling100mW b
Passband Insertion Loss2.8dB (4.5dB a )
Passband Ripple0.4dB (0.7dB a )
Return Loss50dB
Adjacent Channel Isolation30dB (50dB a )
Non-Adjacent Channel Isolation40dB (60dB a )

a High Isolation Version
b per channel

For DWDM, please contact us.


Passive Optical Network Components Environmental Performance Characteristics (all components)

Operating Temperature-20 °C+60 °C e
Storage Temperature-40 °C+85 °C

e Datasheet parameters based on temperature range -10 °C to +50 °C, refer to user manual for performance parameters at -20 °C to +60 °C.

L-Band HTS – 50 Ohm CWDM  (version HRx-L1-DS-6)
L-Band HTS – 75 Ohm CWDM  (version HRx-L1-DS-6)
L-Band HTS – 50 Ohm DWDM  (version HRx-Lx-xx-xx-DCxx-DS-4)

DWDM Mux datasheet (version DS-2)

ViaLite Passive Optical Network Components Datasheet  (version 74000-DS-5)

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