Wavelength Division Multiplexing increases fiber capacity by combining (mux) and separating (demux) multiple input channels over a single fiber output. Wavelength division multiplexers let you expand the bandwidth of optical communication networks and can be used at several locations within each network. Clearfield ® provides WDMs for singlemode fiber applications.

Coarse Wavelength Division Multiplexing

CWDMs combine or multiplex more than one wavelength over one fiber. This is done by using fiber pigtail collimators and wavelength/light filters that are aligned and mounted in a glass tube and typically packaged in a stainless steel tube for more protection. The wavelength/light filters used only allow specific wavelengths of light to pass through the filter and the remainder of the wavelengths to be reflected back. CWDMs can also be used to separate or demultiplex more than one signal using the same device and transmitting the signal in the opposite direction. CWDMs have channel spacing of 20nm with a working channel passband of +/-6.5nm from the wavelengths center. This allows you to add multiple wavelengths on to one fiber while keeping within the operating wavelengths of 1260nm to 1620nm. The wavelengths used are defined by the International Telecommunications Union; reference ITU G.694.2 for the ITU CWDM Wavelength Grid. Note: as of June 2002, 18 center wavelengths, from 1270nm to 1610nm, were listed.

Dense Wavelength Division Multiplexing

Dense Wavelength Division Multiplexing or DWDM is a technology which multiplexes or demultiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths (i.e. colors) of laser light. This technique enables bidirectional communications over one strand of fiber, as well as multiplication of capacity. DWDM signals within the 1550nm band which are wavelengths between approximately 1530–1565nm (C band) and/or 1570–1625nm (L band) adhering to the DWDM ITU-T G.694.1 frequency grid. DWDMs allow you to increase your wavelength capacity. DWDM products can offer multiplexing of multiple channels using 200 GHz and 100 GHz spacing with the option to have an added Expansion port and/or Monitor port. All of the Clearfield Passive Products are Telcordia GR-1209 and GR-1221 certified.

Packaging Options

Clearview Cassette

The foundation of the Clearfield FieldSmart product line, the Clearview Cassette provides up to 36 input/output ports of any optical component device(s) of your choosing or up to eight (8) CWDM optical devices in a single high Clearview Cassette. The Clearview Cassette then populates any “Clearview Multiplied” product across the network, including inside plant panels, outside plant cabinets, and access network products, such as pedestals and wall mount panel enclosures.

Clearview xPAK

A compact and convenient means by which to land up to seven input/output ports of any optical component device. It can be deployed as a stand-alone device or as part of Clearfield’s “Clearview Landed” program, integrated into a Clearfield designed enclosure or many industry-leading enclosures from the provider of your choosing.

Pizza Box

For deployment in a headend rack or OSP cabinet, the Clearfield Pizza Box 1RU 32 Port Panel can deploy multiple optical devices in a 19” or 23” 1 RU format.

LGX

For those service provides who have standardized on the LGX style, Clearfield provides the standard WDM devices in the LGX footprint which can be integrated within a Clearfield supplied LGX chassis or a LGX chassis of your choice.

Discrete

Provides an unpackaged solution to integrate wave division technology into the fiber optic enclosure of your choice. Units are available pre-terminated or un-terminated with 250um, 900um, or 2mm “legs”.

Technical Specifications

WaveSmart Wave Division Multiplexing Channel Spacing Wavelength Range ITU Starting Wavelength Start Channel
CWDM 20 nm 1260 – 1620 1471nm
1491nm
1611nm
N/A
DWDM 100 GHz 1520 to 1560 N/A ITU – T GRID
DWDM 200 GHz 1520 to 1560 N/A ITU – T GRID

 

Parameter Ports Specifications
Pass Channel Wavelength P1 to P3 1260nm to 1360nm
1480nm to 1500nm
Reflect ChannelWavelength P1 to P2 1540 dB to 1565 dB
Insertion Loss P1 to P3P1 to P2 < 0.8 dB< 0.5 dB
Isolation N/A > 25 dB> 18 dB/ °C
PDL N/A < 0.1 dB
Ripple N/A < 0.3 dB
Return Loss N/A > 45 dB
Operating TemperatureRange N/A -40°C to 85°C
Storage TemperatureRange N/A -40°C to 85°C
Maximum Input Power N/A 500 mW
Mechanical Dimension N/A 5 mm x 34 mm

 

200 GHz DWDM Parameter Add/Drop 4 CH 8 CH 16 CH 20 CH 
Wavelength Range 1520 to 1560nm 1520 to 1560nm 1520 to 1560nm 1520 to 1560nm 1520 to 1560nm
Central Wavelength ITU-T G.694.1 ITU-T G.694.1 ITU-T G.694.1 ITU-T G.694.1 ITU-T G.694.1
Bandwidth C ± 0.25nm C ± 0.25nm C ± 0.25nm C ± 0.25nm C ± 0.25nm
Insertion Loss < 0.8 dB < 2.4 dB < 3.4 dB < 5.8 dB < 6.5 dB
Insertion Loss - Reflection < 0.4 dB N/A N/A N/A N/A
Isolation > 30 dB > 30 dB > 30 dB > 30 dB > 30 dB
Isolation - Reflection > 12 dB N/A N/A N/A N/A
PDL < 0.2 dB < 0.2 dB < 0.2 dB < 0.2 dB < 0.2 dB
Return Loss > 45 dB > 45 dB > 45 dB > 45 dB > 45 dB
Operation Temperature -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C
Storage Temperature -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C
Maximum Input Power 500 mW 500 mW 500 mW 500 mW 500 mW
Mechanical Dimensions 5 mm x 34 mm 100 mm x 80 mm x 10 mm 100 mm x 80 mm x 10 mm 100 mm x 80 mm x 10 mm 100 mm x 80 mm x 10 mm

 

100 GHz DWDM Parameter Add/Drop 4 CH 8 CH 16 CH 40 CH
Wavelength Range 1520 to 1560nm 1520 to 1560nm 1520 to 1560nm 1520 to 1560nm 1520 to 1560nm
Central Wavelength ITU-T G.694.1 ITU-T G.694.1 ITU-T G.694.1 ITU-T G.694.1 ITU-T G.694.1
Bandwidth C ± 0.11nm C ± 0.11nm C ± 0.11nm C ± 0.11nm C ± 0.11nm
Insertion Loss < 0.8 dB < 2.4 dB < 3.4 dB < 5.8 dB < 6.5 dB
Insertion Loss - Reflection < 0.4 dB N/A N/A N/A N/A
Isolation > 30 dB > 30 dB > 30 dB > 30 dB > 30 dB
Isolation - Reflection > 12 dB N/A N/A N/A N/A
PDL < 0.2 dB < 0.2 dB < 0.2 dB < 0.2 dB < 0.2 dB
Return Loss > 45 dB > 45 dB > 45 dB > 45 dB > 45 dB
Operation Temperature -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C
Storage Temperature -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C
Maximum Input Power 500 mW 500 mW 500 mW 500 mW 500 mW
Mechanical Dimensions 5 mm x 34 mm 100 mm x 80 mm x 10 mm 100 mm x 80 mm x 10 mm 100 mm x 80 mm x 10 mm 100 mm x 80 mm x 10 mm

 

CWDM Parameter Add/Drop 4 CH 8 CH
Wavelength Range 1260 to 1650nm 1260 to 1650nm 1260 to 1650nm
Central Wavelength ITU-T G.694.2 ITU-T G.694.2 ITU-T G.694.2
Bandwidth C ± 6.5nm C ± 6.5nm C ± 6.5nm
Insertion Loss < 0.8 dB < 2.0 dB < 3.0 dB
Insertion Loss - Reflection < 0.4 dB N/A N/A
Isolation > 30 dB > 30 dB > 30 dB
Isolation - Reflection > 12 dB N/A N/A
PDL < 0.2 dB < 0.2 dB < 0.2 dB
Return Loss > 45 dB > 45 dB > 45 dB
Operation Temperature -40°C to 85°C -40°C to 85°C -40°C to 85°C
Storage Temperature -40°C to 85°C -40°C to 85°C -40°C to 85°C
Maximum Input Power 500 mW 500 mW 500 mW
Mechanical Dimensions 5 mm x 34 mm 100 mm x 80 mm x 10 mm 100 mm x 80 mm x 10 mm

Features & Benefits

Integrity

  • Compliant to Telcordia GR-1221
  • Consistent performance

Protection

  • Wide operating temperature range
  • Low polarization sensitivity
  • No epoxy in optical path

Access

  • Transport protocol independent
  • Low insertion loss
  • Minimal optical loss

Investment

  • Wide bandwidth (CWDM/DWDM)
  • Mux, demux and universal options available
  • PDL = < 0.2 dB
  • Return Loss = > 45 dB