What is the full form of EDC?

Introduction

Electronic dispersion compensator (EDC), and GPON (Gigabit passive optical network) GPON uses “Fabry-Perot laser technology” for high speech networks. EDC improves transmission up to 2000 Km, with fast-adaptive compensation ability.

Nowadays, we need a strong network for communication like fibre-to-home communication. There is a different network that uses different techniques to process from fibre to home communication EDC and GPON, etc. Electronic Dispersion compensator.

Definition of EDC

Electronic dispersion compensators (EDC) is a process to reduce the effect of dispersion in fibre-optic communication links with electronic components in the acceptor device”. It is used for chromatic dispersion compensation.

It contains four blocks; Block A has the optical components for generating a signal, Block B produces two electric signals, block C is a local oscillator for modulating signals and Block D has a transmission line.

• There are two modes of electronic dispersion, which work in a different type of data receivers; linear and nonlinear dispersion.

• In a direct detection receiver, the effect of dispersion cannot be removed as it depends upon frequency phase change.

• In linear dispersion, the electronic input is dependent upon the line equalisers (transversal filters). Here the signal is dependent on different time delays and recombined after magnification with a suitable layer. This technique can be improved by processing signals in the presence of non-linear distortion that arises from self-phase modulation.

• In the non-linear technique, the nonlinear feedback equalisers partly compensate for lost spectral information by the previous decision.

How EDC Works?

Electronic dispersion compensation uses an electronic filter to remunerate for dispersion in an “optical communication link”.

• In this dispersion method “filters” are used in the communication channel to “remunerate for the signal degradation caused by the medium”.

• The signal in the electronic dispersion compensator is carried out by a “transversal filter”, and the output of that is a “weighted sum of several time- delayed inputs”.

• An electronic dispersion compensator automatically adjusts the weight of filters as per the strength of the signal, this process is known as “adaptation”.

• EDC operates in both single and multimode fibre optic systems.

• EDC can be attached with a “10 Gbit/s” receiver to reduce the transmitter cost and increase the distance of the signal.

Applications of EDC

Electronic dispersion compensation is used for chromatin fibre dispersion compensation.

• Electronic dispersion compensation is used in the long-distance optical fibre transmission process. This method is preferred as it reduces the dispersion between the transmitter and receiver.

• It is used to increase the speed of optical fibre using the electronic signal at a reasonable cost.

• It is used for upgrading the 1310 nm optical fibre link to 1550 nm for operation.

• They are used in 10G ethernet EDC, LAN, MAN, radio and long-distance data transmission, magnetic storage, etc.

Advantages of EDC

Electronic dispersion compensator is used for both single and multimode fibre optic systems.

• EDC can be attached with a “10 Gbit/s” receiver to reduce the transmitter cost and increase the distance of signal at a low receiver penalty.

• It reduces the chromatic dispersion between the transmitter and receiver.

• It has low insertion loss and high dispersion performance.

• It is designed for large bandwidth with a low deficit and less ruffle.

Conclusion

EDC stands for Electronic dispersion compensator. This system is used in fibre optical communication networks. The EDC optimises the signal of the system by using two signals. It provides impairment to rebuild signals and revamp the system. The system is used for long-distance transmission up to 2000 km. The EDC is used in ethernet, LAN and MAN networks. It is also used in radio transmission, electronic data transmission, mobile data transmission, magnetic storage systems, etc. The electronic dispersion compensator allows the transmission of “2.5 Gbit/s” and “10 Gbit/s” without installing the DCF system.

FAQs

Q1. What is a dispersion compensator?

Ans: Dispersion compensator is an essential part of fibre optic communication. It spreads the pulse in an optical fibre. It increases on increasing the fibre length. Dispersion is divided into three categories; modal dispersion, chromatic dispersion and polarisation.

Q2. What is the “chromatic dispersion” phenomenon?

Ans: “Chromatic dispersion” is the spread of signal from the different speeds of light rays. It is a mixture of matter and electromagnetic wave effect. For example, G.653 fibres are manufactured by this method. It is caused by the wavelength of the fibre core material.

Q3. What is the polarisation mode of dispersion?

Ans: In the Polarisation mode of dispersion (PMD) the transmission is held through the propagation of light waves in optical fibre. Light is defined as an energy wave which possesses two mutually perpendicular axes. These waves transfer at different speeds in optical fibre. The speed of the wave in PMD is less than 2.5 Gbps for distances longer than 1000 km.