Optical Systems and Networks

Lecturer:

Leoš Boháč (gar.), Michal Lucki

Tutor:

Michal Lucki

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:

Final examination + assessment.

Conditions for credits:

1. 100 % participation in the exercises - the make-up measurement in the case of acceptable excuse, as agreed with the teacher

2. Preparation of reports on particular measurements during exercises

3. Successful completion of the final test

Examination:

Exam will be carried out in a form of a rated test with a maximum of 30 points. The valid credit is prerequisite for an exam. Evaluation is of 80% Exam and 20% of practice.

Syllabus of lectures:

1. Benefits of optical fiber technology, comparison optical and metallic lines. Economical factors influencing the development of FTTx technology. The problem of fiber's attenuation.

2. Components and blocks of optical communication systems, CWDM and DWDM systems, Optical Transport Hierarchy (OTH) and access networks.

3. Wave propagation in optical fibers (Total Internal Reflection, Modified Total Internal Reflection, Photonic Band Gap). ITU-T recommendations (attenuation, dispersion, modal regimes, Numerical Aperture, fiber's geometry).

4. Design of optical fibers and systems (I): 3R-regeneration, dispersion compensation (chromatic dispersion, Polarization Mode Dispersion).

5. Design of optical fibers and systems (II): optical amplifiers: Erbium Doped Fiber Amplifier (EDFA), Raman amplifiers, semiconductor optical amplifiers (SOA).

6. Microstructured fibers (I): Index Guiding Photonic Crystal Fibers, Hollow Core Photonic Crystal Fibers.

7. Microstructured fibers (II): Highly Nonlinear PCFs. The problem of fiber bending, optimization of propagation losses.

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

9. Optical couplers and filters (Bragg filter, Mach Zehnder filter), optical AWG demultiplexer, insulators, polarization controllers, microstructured planar bending structures and all-optical interferometric switches.

10. Optical sources and photodetectors - parameters and usage.

11. Optical systems in practice, actual problems in the area of fiber optics and nanotechnologies.

12. Basic measurements in fiber optic technology.

13. The summary for the examination.

14. Free time, (thursday's timetable).

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:

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 advanced optical communications systems and networks. Students will learn how to design practical optical fiber link and the network. Students will receive theoretical knowledge for implementation of future optical photonic networks, which will be based on combination of wavelength multiplexing with an all-optical switching.

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:

Time-table for winter semester 2011/2012:

	06:00–08:0008:00–10:0010:00–12:0012:00–14:0014:00–16:0016:00–18:0018:00–20:0020:00–22:0022:00–24:00
Mon
Tue
Fri
Thu
Fri
Sat	roomT2:B3-714 Lucki M. 07:30–19:30 (lecture parallel1) Dejvice Laboratoř K332

Time-table for summer semester 2011/2012:

Time-table is not available yet

The course is a part of the following study plans:

• Komunikace, multimedia a elektronika - Sítě elektronických komunikací_145248 (compulsory course of the specialization)