Dense Wavelength Division Multiplexing Concepts

Dense Wavelength Division Modulation

Digital Wavelength Division Multiplexing

Dense Wavelength Division Multiplexing

Dynamic Wavelength Division Management

They are widely separated to prevent interference.

They are very close to each other in terms of wavelength.

They operate on different frequency bands.

They require separate physical fibers for each channel.

To amplify individual wavelengths before transmission.

To separate combined wavelengths into individual channels.

To combine multiple individual wavelengths from different transmitters onto a single fiber.

To add or drop optical channels at intermediate points.

To convert optical signals to electrical signals.

To combine multiple wavelengths onto a single fiber.

To amplify the optical signal over long distances.

To add or drop specific optical channels from the fiber without demultiplexing all channels.

Electrical Data Fiber Amplifier

Erbium Doped Fiber Amplifier

Enhanced Digital Fiber Array

Electronic Dispersion-Free Amplifier

To convert optical signals into electrical signals.

To multiplex multiple wavelengths onto a single fiber.

To amplify the optical signal to increase transmission distance and overcome attenuation.

To separate individual wavelengths for different receivers.

Wavelength Division Multiplexer

Optical Add/Drop Multiplexer (OADM)

Erbium Doped Fiber Amplifier (EDFA)

Wavelength Division Demultiplexer

Noise and interference

Crosstalk and latency

Attenuation and dispersion

Bandwidth and signal-to-noise ratio

Noise and interference

Attenuation and dispersion

Bandwidth and latency

Crosstalk and reflection

To convert optical signals to electrical signals.

To recover the problem of signal attenuation.

To multiplex different wavelengths onto a single fiber.

To regenerate the optical signal by converting it to electrical and back to optical.