Difference between dwdm and sdm ??

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DWDM (Dense Wavelength Division Multiplexing) and SDM (Space Division Multiplexing) are both techniques used in optical communication, but they differ in how they multiplex signals.

DWDM multiplexes signals using different wavelengths of light on the same fiber optic cable, increasing bandwidth capacity.
SDM multiplexes signals by using different spatial paths within the same fiber optic cable, allowing for multiple data streams to be transmitted simultaneously.
DWDM is more commonly used in long-haul communication networks, while SDM is still in the research and development stage.
DWDM is more cost-effective for increasing bandwidth capacity over long distances, while SDM has the potential to increase data transmission speeds within shorter distances.

Difference between dwdm and sdm ??

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