Application of WDM : 1)Fibre optics 2)Aircraft application 3)RF avionics

1. APPLICATION OF WAVELENGTH
DIVISION MULTIPLEXING
• Fibre optics.
• Aircraft application.
• RF avionics.

2. Name
 Ankit - 42
 Mohan - 47
 Aadarsh - 63
Topics
Fibre optics.
Aircraft application.
RF avionics.

3. 1. Fibre optics.

4. Because the bandwidth property of optical fibre are well
known
and make it the media of choice for high-speed data and video
applications. However, various forms of multiplexing are
required to take advantage of this bandwidth.
 WDM is one of them.
WDM is used to transmit more than one high speed digital
data
stream on a single optical fibre.

6. Through the use of WDM the available capacity of optical fibres is enhanced
through the used of parallel channels, where each channel uses a dedicated
wavelength of light.
This requires a WD multiplexer in the transmitting equipment and a demultiplexer
(essentially a spectrometer) in the receiving equipment.

7.  WDM puts together multiple signals & sends them at the same time along a fibre
with transmissions taking at different wavelength. This turns a single fibre into the
virtual equivalent of a handful fibres. The most modern of these system allows for
much more than a handful of fibres.

8. 2. Aircraft Application.

9. WDM can help achieve future generation Aircraft networks that are
1. High capacity.
2. Flexible.
3. Future-proof.
4. Secure and low cost.

10. • Cost : The WDM layer reduces the cost through advancement in technology performance and
integration .
• Flexibility and scalability : needs WDM components that enable reconfigurability (eg. Tuneable
lasers, ROADMS,optical switches) and support a future proof infrastructure.
• Reliability : WDM components that can perform enhanced requirements associated with harsh
avionics environment .
• WDM is also used in Aircraft Application as :
1. Network Definition: Architectures, Protocols, Algorithms, Control and Management
associated with insertion of WDM-based backbone layer .
2. Security: WDM networks that cost-effectively support redundancy requirements and
multiple independent levels of security (enable MLS policy enforcement.

11. 3. RF Avionics.

12. Radio frequency (RF) is a measurement representing the oscillation rate of
electromagnetic radiation spectrum, or electromagnetic radio waves, from
frequencies ranging from 300 GHz to as low as 9 kHz. With the use of
antennas and transmitters, an RF field can be used for various types of wireless
broadcasting and communications.

13. • Optical fiber WDM has many advantages over co-axial cables for the transmission of RF signal in
avionics application.
• Optical fibre exhibits considerably less loss and can support signals requiring much higher
bandwidth which is immune to electromagnetic interference (EMI), and offers significant size
and weight savings when compared to coaxial cable.
• Due to this the availability of the Internet onboard commercial aircraft adds increased credence
to ambitions of delivering new information services during flight .
• The onboard implementation of Voice-over-IP (VoIP), high definition television (HDTV), and
radio frequency (RF) signals used to transport cellular signals.

14. • WDM in RF avionics has been used by the telecommunications industry to increase the digital
information carrying capacity of optical fibers.
• According to study done by “National Aeronautics and Space Administration” WDM network
supporting four analog RF channels has been demonstrated as a successful application that
meets the demands of the avionics environment.

15. 1. http://ieeexplore.ieee.org/Xplore/guesthome.jsp
2. http://ieeexplore.ieee.org/document/4653181/
3. https://www.researchgate.net/publication/261321351_Ronia_results_WDM-
based_optical_networks_in_aircraft_applications
4. https://www.researchgate.net/publication/224099279_WDM_Optical_Backbone_Networks_in_aircr
aft_applications_Networking_challenges_and_standards_progress
5. https://www.researchgate.net/publication/224650945_Advances_in_WDM_LAN_Standards_Develo
pment_for_Aerospace_Applications
6. https://www.researchgate.net/publication/252536971_The_transmission_of_multiple_RF_signals_i
n_free-space_optics_using_wavelength_division_multiplexing [accessed Sep 10, 2017].
7. http://www.moog.com/literature/MCG/MultiplexingAppnote.pdf //WDM in fibre optics
8. https://en.wikipedia.org/wiki/Fiber-optic_communication#Transmitters