1. Objective teaching:
This module focuses on the study of the transmission by optical fiber and the design of the various architectures and systems of optical communications networks. It deals with the phenomena of propagation, reflection, refraction, and losses of light (optical signal) in optical fibers. It also covers transmission through the various structures and architectures of optical communications networks. This is because light is affected by the propagation medium and the interfaces between the different mediums. It is therefore essential to study the propagation and losses of a light signal in optical fibers, and to dimension and characterize fibers, taking into account the different structures and architectures of optical communication links.
2. Course outline:
The first chapter provides a brief history of the evolution of optical communication and the different generations of optical communication systems and their characteristics. Finally, we present the various advantages of optical fibers.
The second chapter covers the geometrical approach based on the study of light propagation in the core of the optical fiber. The boundary condition for total reflection at the fiber core-cladding interface, the expression for numerical aperture, and the different types of optical fiber will also be discussed. The second part of this chapter presents the wave approach and the formulae used to calculate the modes in the multimode optical fibers for both step-index and graded-index fibers.
The Third chapter describes optical transmitters and receivers such as LED, LASER, PIN photodiode, avalanche photodiode, and the signal-to-noise ratio detected in the receivers.
The next chapter is devoted to the presentation of a complete fiber optic transmission system and the different types of connectors. This chapter also explains the different structures and families of digital links: point-to-point, links with optical amplifiers, and multiplexed links (WDM and OTDM).
The last chapter presents the different fiber-optic networks: passive, active, point-to-point, and point-to-multipoint. The topologies used to build fiber-optical networks and the power budget of an optical network are also covered. Next, an optical network's performance and evaluation criteria will be detailed. The chapter ends with a presentation of Bragg gratings.
Module: Optical communications.
Teacher: Pr. Mohammed BOULESBAA.
Mail: Boulesbaa.mohammed@univ-ouargla.dz
Coefficient: 2.
- Enseignant: Mohammed BOULESBAA