Passive optical distribution
Match splitter or WDM architecture to wavelength plan, ratio, package and insertion-loss targets.
A passive CWDM multiplexer/demultiplexer using 20 nm channel spacing for metro-access and optical transmission capacity expansion.
Coarse Wavelength Division Multiplexer (CWDM) Series combines signals at different wavelengths onto a single fiber and separates them at the far end. Its 20 nm channel spacing supports wavelength expansion where a coarse grid meets the reach, transceiver and loss requirements.
The current optical table covers two, four, eight and sixteen-channel loss levels. The component is passive, but the complete link still depends on CWDM-compatible transmitters, a defined wavelength plan and sufficient power margin.
Specify every wavelength, mux/demux direction, channel count, common and optional pass/monitor ports, connectors, fiber leads and housing. Confirm transceiver wavelengths and include the selected channel count's insertion loss in the end-to-end budget.
Huijue Group can review OEM CWDM modules, private-label port legends and drawing-based packages. A customer channel schedule can define the build; filter plan, connectorization, optical acceptance, sample approval and production quantity require confirmation.
| Optical Performance Index: Parameter | Specification | Unit |
| ITU Grid | nm | |
| Channel Bandwidth | λc ± 6.5 (minimum) | nm |
| Channel Spacing | 20 | nm |
| Channel Flatness | ≤ 0.4 | nm |
| Insertion Loss | ≤ 1.6 (2 Channel) | dB |
| ≤ 2.4 (4 Channel) | dB | |
| ≤ 2.5 (8 Channel) | dB | |
| ≤ 3.5 (16 Channel) | dB | |
| Adjacent Channel Isolation | ≥ 30 | dB |
| Non-Adjacent Channel Isolation | ≥ 45 | dB |
| Insertion Loss Temperature Coefficient | ≤ 0.005 | dB/℃ |
| Polarization Dependent Loss (PDL) | ≤ 0.1 | dB |
| Polarization Mode Dispersion (PMD) | ≤ 0.1 | ps |
| Return Loss (RL) | ≥ 45 | dB |
| Directivity | ≥ 55 | dB |
| Operating Temperature | 0 to 70 | ℃ |
| Storage Temperature | -40 to 85 | ℃ |
| Package Dimensions | 80 (L) x 58 (W) x 6.6 (H) | mm |
The listed operating range is 0°C to 70°C and storage range is -40°C to 85°C. House the device in a suitable enclosure and protect the leads from pull, sharp bend and contamination.
Buyer Questions
Answers specific to Coarse Wavelength Division Multiplexer (CWDM) Series selection, configuration and purchasing.
This CWDM series uses a 20 nm coarse grid, while the listed DWDM family uses much closer 100 or 200 GHz spacing. Optics and channel plans are not interchangeable.
The passive mux/demux component itself does not; the optical transmitters and receivers are powered equipment.
Expansion is possible only if the original channel plan, module ports, transceivers and link budget allow it. Define the future wavelengths during design.
Use the deployment context to narrow the configuration before comparing dimensions, capacities and options.
Match splitter or WDM architecture to wavelength plan, ratio, package and insertion-loss targets.
Coordinate connector, polish, fiber grade, polarity and cable length across patching points.
Plan MPO/MTP trunks and harnesses around port mapping, breakout format and rack density.
Select splicing, cleaning and test tools for the connector types and measurements used on site.
Before quotation: confirm capacity, interfaces, installation environment, power conditions, quantity and required options.