- stands for dense wavelength division multiplexing.
- it's main target is providing ultra higher data rates.
- used to multiplex Multiple Data streams on different wavelengths and transmit them on single fiber at the same time.
- it's advantage is higher capacity , long distance Tx , high performance to cost ratio , use the existing optical fiber.
- use C and L bands .
- C band is the Best because low losses / attenuation.
- C band is from 1525 to 1565 nano meter , 191- 196 thz.
- we use G652 , G653 , G655 single mode fiber standard.
- our limitations is Dispersion , attenuation , four wave mixing , non linear effect.
- our main concern is the OSNR [ optical signa6to noise ratio ].
- we can use OTN to transmit Data on lager frames 4 * 4080 with up to 400 Gbps for the stream.
- we use multiple types of optical modules like XFP , CFP4 , CFP8 , SFP+ , ESFP .
