Mattingly "AI & Prompt Design: The Basics of Prompt Design"
DWDM( DENSE WAVELENTH DIVISON MULTIPLEXING)
1. A Seminar On
Dense Wavelength Division
Multiplexing (DWDM)
Presented BY –
ANSH YADAV
CSE 3rd Year
2. Contents
• Definition What is DWDM?
• Component of DWDM
• How It Works?
• Benefits of DWDM
• Application
• Conclusion
3. 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 .
5. 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.
7. 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.
8. 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.
9. 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
10. 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.
12. How It Works
DWDM 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.
13. Conti..
In addition to these functions, a DWDM system
must also be equipped with client-side
interfaces to receive the input signal.
14. 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.
15. 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
16. 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
