Wave Division Multiplexing (WDM)
FAQs
Wave Division Multiplexing (WDM) is a technology that allows multiple optical signals to be transmitted simultaneously on a single fibre strand by using different wavelengths (colours) of light. This dramatically increases fibre capacity without needing to lay additional cables. It’s a cost effective way to expand bandwidth in data centers, telecoms, and FTTx networks.
Multiplexing arrays (like CWDM or DWDM modules) combine multiple wavelengths of light onto a single fibre or separate them back into individual channels. Benefits include:
- High efficiency, maximises existing fibre capacity.
- Flexibility, channels can be added or dropped as needed.
- Scalability, supports growing bandwidth needs without major recabling.
These are widely used in long haul telecoms, metro networks, and enterprise backbones.
When selecting WDM products, consider:
- Type of WDM, like CWDM (Coarse) for shorter distances and cost sensitive projects, DWDM (Dense) for long haul, high capacity networks.
- Channel count, s how many wavelengths you need to multiplex or demultiplex.
- Splitter ratio, match output ports to the number of subscribers or devices you plan to serve.
- Form factor, like rackmount, LGX cassette, or compact module depending on your installation space.
Fibre optic splitters are passive devices that divide a single optical signal into multiple outputs, or combine multiple signals into one. In WDM, splitters are used to distribute light from one fibre to many, supporting applications such as FTTx (GPON/EPON), CATV, and monitoring systems. Splitters come in different split ratios (e.g., 1:2, 1:4, 1:16, 1:32) depending on network design.