Optical Systems and Networks

Garant předmětu:

Lecturer:

Tutor:

Supervisor:

Department of Telecommunications Engineering

Synopsis:

The course deals with the use of optical radiation for the transmission of information. The aim is to acquaint students with the functions of important components used in an advanced optical communication systems and networks. Students will learn how to design practical optical fiber link and the network. Students will receive theoretical knowledge for the implementation of a all-optical photonic networks in the future, which will be based on a combination of wavelength multiplex with an all-optical switching.

Requirements:

basic knowledge of optics and communication networks

Syllabus of lectures:

1. Benefits of fiber optic technology. FTTx. Comparison with xDSL.

2. Components of optical communication systems, CWDM and DWDM systems.

3. Technical specification for Passive Optical Networks (PON) by ITU-T and IEEE.

4. ITU-T recommendations for fiber optics (permittalbe attenuation, modal regimes, numerical aperture).

5. Optical Time Domain Reflectometry for optical paths testing.

6. Optical amplifiers: Erbium Doped Fiber Amplifier (EDFA), Raman amplifiers, Semiconductor Optical Amplifiers (SOA).

7. Dispersion in optical fibers (chromatic and modal dispersion, PMD).

8. Nonlinear effects in optical fibre paths - Four Wave Mixing (FWM), Raman crossalk.

9. Manufacturing of optical fibers and cables, optical splices and connectors, fiber splicing.

10. Sources of optical radiation. Fabry-Perot laser, DFB laser, LED. Photodetectors used in telecommunication systems. PIN diode. Spectral analyzers. Optical couplers and filters gratings, all-optical interferometric switches.

11. Optical phase and intensity modulations and modulators - principle, performance. Optical splitters and AWG.

12. Optical sensors. Fiber-optic perimeters. Non-telecommunication applications of optical fibres.

13. Trends in optoelectronics. Specialty optical fibers: Photonic Crystal Fibers.

14. Summary for the examination.

Syllabus of tutorials:

1. Introduction to opto-electronic communications, safety in the laboratory, splitting into working groups

2. Theoretical preparation for slicing of optical fibers

3. Optical fiber splicing

4. Theory of fibers and the numerical aperture

5. Measuremnt of the numerical aperture of optical fibers

6. Theory and function of OTDR and methods of optical fiber attenuation measurement

7. Measurement of optical fiber attenuation using backscatter (OTDR)

8. Direct measurement method of optical fiber attenuation

9. Theory of optical amplifiers and principles of their measurement

10. Optical signal regeneration using optical amplifier

11. Theory of optical couplers and preparation for their measurements

12. Measurement of fundamental parameters of optical couplers

13. Test, credit

Study Objective:

Students will learn how to design practical optical fiber link and the network. Students will receive theoretical knowledge for the implementation of a all-optical photonic networks

Study materials:

R. Freeman:Fiber Optic Systems for Telecommunications, Wiley series in telecommunications and signal procesing, 2002, ISBN 0-471-41477-8

John M. Senior: Optical Communications Principles and Practise. Prentice Hall, 1992, ISBN 0-13-635426-2

Gagliardi, R. M. - Karp, S.: Optical Communications. John Wiley @ Sons, Inc., 1995, ISBN 0-12-471-54287-3

Kaminow, I. P. - Koch, T. L.: Optical Telecommunication III A. Academic Press, 1997, ISBN-0-12-395170-4

Kaminow, I. P. - Koch, T. L.: Optical Telecommunication III B. Academic Press, 1997, ISBN-0-12-395171-2

Note:

Further information:

https://moodle.fel.cvut.cz

No time-table has been prepared for this course

The course is a part of the following study plans:

• Electronics and Communications - Photonics (compulsory course in the program)
• Electronics and Communications - Communication Networks and Internet (compulsory course in the program)