DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

17
A Seminar On Dense Wavelength Division Multiplexing (DWDM) Presented BY – ANSH YADAV CSE 3 rd Year

Transcript of DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

Page 1: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

A Seminar On

Dense Wavelength Division Multiplexing (DWDM)

Presented BY –ANSH YADAVCSE 3rd Year

Page 2: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

Contents

• Definition What is DWDM?• Component of DWDM• How It Works?• Benefits of DWDM• Application• Conclusion

Page 3: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

What is DWDM?:

Definition- Dense wavelength division multiplexing (DWDM) is a technology that puts data from different sources together on an optical fiber, with each signal carried at the same time on its own separate light wavelength.

Dense wavelength division multiplexing (DWDM) is a technology that uses more than eight multiplexed signals to transmit many wavelengths of light simultaneously over a single optical fiber .

Page 4: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

Components of DWDM

• Optical Fiber.• DWDM Terminal Multiplexer.• Intermediate Line Repeater.• DWDM Terminal De-Multiplexer.• Optical Supervisory Channel (OSC).

Page 5: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

Optical Fiber• An optical fiber is a flexible, transparent fiber

made of extruded glass (silica) or plastic, slightly thicker than a human hair.

• It can function as a waveguide, or “light pipe”, to transmit light between the two ends of the fiber.

Page 6: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

Working Principle

• Its work on total internal reflection.

Page 7: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

DWDM Terminal Multiplexer

The terminal multiplexer actually contains one wavelength converting transponder for each wavelength signal it will carry. The wavelength converting transponders receive the input optical signal (i.e., from a client-layer or other signal), convert that signal into the electrical domain and then retransmit the signal using a band laser.

Page 8: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

Intermediate Line Repeater

It is placed approx. every 80 – 100 km for compensating the loss in optical power, while the signal travels along the fiber. The signal is amplified by an EDFA which usually consists of several amplifier stages.

Page 9: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

DWDM Terminal De-Multiplexer

The terminal de-multiplexer breaks the multi-wavelength signal back into individual signals and send its outputs on separate fibers for client-layer systems to detect. Originally, this de-multiplexing was performed entirely passively, except for some telemetry as most SONET systems can receive 1550-nm signals

Page 10: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

Optical Supervisory Channel

This is an additional wavelength usually outside the EDFA amplification band. The OSC carries information about the multi-wavelength optical signal at the optical terminal. It is also normally used for remote software upgrades, user and Network Management information.

Page 11: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

Block Diagram of DWDM

Page 12: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

How It WorksDWDM fiber works by combining and transmitting multiple signals simultaneously at different wavelengths on the same fiber. In effect, one fiber is transformed into multiple virtual fibers.

A DWDM the system performs the following main functions:-

• Combining the signals.• Generating the signal.• Transmitting the signals.• Separating the received

signals.• Receiving the signals.

Page 13: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

Conti..

In addition to these functions, a DWDM system must also be equipped with client-side interfaces to receive the input signal.

Page 14: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

Benefits Of DWDM• Capacity increase : Large aggregate transmission

capacity. • Upgradability : Customer growth without requiring

additional fiber to be laid.• Scalability : The possibility to add new nodes to the

network.• Network Transparency : Independence of data rate,

format & protocols.

Page 15: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

Application DWDM is ready made for long-distance

telecommunications operators that use either point-to-point or ring topologies.

Building or expanding networks Network wholesalers can lease capacity,

rather than entire fibers. The transparency of DWDM systems to

various bit rates and protocols. Utilize the existing thin fiber DWDM improves signal transmission

Page 16: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

Conclusion• Robust and simple design• Works entirely in the Optical domain• Multiplies the capacity of the network many fold• Cheap Components• Handles the present BW demand cost effectively• Maximum utilization of untapped resources• Best suited for long-haul networks

Page 17: DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)

Thank You!Queries ?