440-4114/01 – Optical Communications I (OK I)

Gurantor departmentDepartment of TelecommunicationsCredits6
Subject guarantorprof. RNDr. Vladimír Vašinek, CSc.Subject version guarantorprof. RNDr. Vladimír Vašinek, CSc.
Study levelundergraduate or graduateRequirementOptional
Year1Semesterwinter
Study languageCzech
Year of introduction2012/2013Year of cancellation
Intended for the facultiesFEIIntended for study typesFollow-up Master
Instruction secured by
LoginNameTuitorTeacher giving lectures
LAT04 Ing. Jan Látal, Ph.D.
VAS40 prof. RNDr. Vladimír Vašinek, CSc.
Extent of instruction for forms of study
Form of studyWay of compl.Extent
Full-time Credit and Examination 4+2
Combined Credit and Examination 6+6

Subject aims expressed by acquired skills and competences

Understand the function of optoelectronic components used in optical networks. Learning outcomes are set so that the students are able to identify and apply tasks in the field of optoelectronics.

Teaching methods

Lectures
Tutorials
Experimental work in labs
Project work

Summary

This subject presents an introduction to the studies of optoelectronics problems specialized in optical communications. Except an introduction, that represents the place of optical communications in today's communication technologies, freshmen will be familiarized with fundamental properties of light essential for phenomena understanding in optical fibres. Optical fibers themselves are divided into different levels: basic description and advanced description. All fibres are described in this way, multimode, single mode and plastic optical fibers. All characteristics are described - from mechanism of light guidance, over attenuation and dispersive phenomena. As the linear so nonlinear phenomena in optical fibers are described.

Compulsory literature:

Ghatak,A.K., Thyagarajan,K.: Introduction to fiber optics. Cambridge University Press, 1st edition, 1998, ISBN 0-521-577853 Agrawal,G.P.. Fiber optic communication systems. J.Wiley and Sons, 1st edition, 1992, ISBN 0-471-54286-5 Hoss,R.J., Lacy,E.A.: Fiber Optics. Prentice Hall Inter.Inc. 2nd edition, 1993, ISBN 0-13-181389-7

Recommended literature:

Filka,M.: Optoelectronics for telecommunications and informatics. ProfiberNetworking CZ,s.r.o., ISBN 987-80-86785-14-1 Šiška,P. a kol.: Optoelektronika. Skripta byla podpořena projektem č. CZ.1.07/2.3.00/20.0217

Way of continuous check of knowledge in the course of semester

Successfully passing of the two tests in exercises, handover of protocols from laboratory measurements

E-learning

Další požadavky na studenta

The condition for the credit obtaining are handover of all reports from laboratory measurements and succesfully managing of two tests.

Prerequisities

Subject has no prerequisities.

Co-requisities

Subject has no co-requisities.

Subject syllabus:

Lectures Introduction to telecommunications and optical fibers - Telecommunications, basic ideas, connection point to point, networks, information capacity of optical fibers, transition from analog to digital transmission systems, place and role of the optical communication systems, history and development of the transmission properties and parameters of optical fibers, fiber optical communications systems, basic block diagram of optical transmission, nowaday stage in optical systems, future development trends Basics of optical fibers 1 - Light guidance in optical fibers, step index fibers as a basic optical communication structure, total reflection on the core-cladding boundary, refractive index of core and cladding, critical angle on the core-cladding boundary and critical angle of transmission, light launching into optical fiber, acceptance angle, numerical aperture, attenuation on optical fibers, bending losses, microbending losses, light scattering, basic mechanism of absorption, transparent windows for fibers made of SiO2, calculation of total attenuation of optical line, direct method of attenuation measurement Basics of optical fibers 2 - Intermodal and chromatic dispersion, description of modes, number of modes, physical meaning of modes, modal dispersion, mechanismus of pulse spreading and its calculations, resctriction of the bite rate due to modal dispersion in optical line, first solution to modal dispersion - grade-index fibers, basic ideas of graded-index fibers, reduction of the modal dispersion due to graded-index fibers, second and principal solution of the modal dispersion - singlemode fibers, structire of singlemode fiber, comparison of the modal dispersion in three types of optical fibers Basics of optical fibers 3 - Chromatic dispersion, mechanismus of chromatic dispersion creation, calculating pulse spreading caused by chromatic dispersion, definition of bit rate and bandwidth, relationship between bit rate and bandwidth, elektrical and optical bandwidth, total dispersion and bit rate, bit rate calculation, specification of bit rate and bandwidth by optical fibers producers Basics of optical fibers 4 - Reading a data sheet of optical fibers, general parameters, optical characteristics, geometrical characteristcs of optical fibers, environmental specifications of optical fibers, mechanical specifications, other characteristics Basics of singlemode fibers (SM fibers) 1 - Principle of action, Gaussian beam, influence of core and cladding to mode field diameter (MFD), cutoff wavelength of SM fiber, attenuation in SM fibers, macrobending loss, microbending loss, absorption of light and light scattering of SM fibers, dispersion and bandwidth, chromatic dispersion, material dispersion, Basics of single mode fibers 2 - waveguide dispersion, coventional fibers, shifted fibers, dispersion flattened fibers, polarization mode dispersion (PMD), bandwidth and bit rate of SM fibers, reading of datasheets, general characteristics, transmission parameters, MFD and cutoff wavelength, geometric characteristics, mechanical properties of SM fibers Basics of sources for optical communications - lasers 1 Basic properties of lasers, spontaneous and stimulated radiation, population inversion, positive feedback, material loss, laser activity and conversion laser characteristics, characteristics and laser light properties, Basics of sources for optical communications - lasers 2 diode lasers, basic structures of laser diodes, DH, BH, stripe lasers, QW lasers, VCSEL, optical resonators, restriction of the bandwidth, DFB and DBR lasers, laser diodes with and without active cooler, datasheets parameters of laser diodes Basics of sources for optical communications -LEDs Advantages and disadvantages of LEDs to laser dodes, creation of photons in semiconductors, light radiation from pn junction, basic description and LED characteristics, homostructure LEDs, heterostructure LEDs, surface radiating LEDs(SLED), edge radiating LEDs(ELED), light coupling into optical fiber, technology improving coupling of optical fiber to LEDs, datasheets parameters of LEDs, modulating bandwidth Tests and measurements of otical fibers and cables- 1 Kinds of measurements, measurement at SM and MM optical cables, attenuation measurement, conditions for correct attenuation measurement, cut off method, direct method of attenuation measurement, OTDR-metr, basic parts of OTDR-metr, dead zones Basics of detectors and receivers for optical communications - Basic requirements on optical detectors, basic principles and fotodetector structures, pfotidiode with PN junction, photovoltaic and photoconductive modes of operation, responsivity of photodiode, responsivity versus wavelength, short and long cutoff wavelength of photodiode, sensitivity of photodiode, photodiode bandwidth, equivalent circuit of a PN photodiode, bandwidth and photodiode digest, PIN photodiode, avalanche photodiodeAPD), MSM detectors Fiber optic networks Telephone networks, data networks, access networks, transport networks, multiplexing hierarchy in telecommunication networks, metropolitan networks, synchronous and asynchronous network, modulation and optical network multiplex, cable TV networks, place of optical networks in OSI model, coherent communication systems Exercises Safety rules for manipulation with laser light, laser light properties Calculation of fiber lines attenuation Calculation of power levels of optical routes Calculation of modal dispersion Calculation of modal dispersion for gradded index fibers Calculation of material dispersion Test No.1 Attenuation measurement of optical cabels and fibers Attenuation measurement of optomechanical splices and connectors Measurement of current/voltage characteristics of LEDs and LDs Mesurement od power/current characteristics of LEDs and LDs Attenuation measurement of optical fibers and cables with OTDR Measurement of bending radii to attenuation of MM fibers Test No.2

Conditions for subject completion

Full-time form (validity from: 2013/2014 Winter semester)
Task nameType of taskMax. number of points
(act. for subtasks)
Min. number of points
Exercises evaluation and Examination Credit and Examination 100 (100) 51
        Exercises evaluation Credit 45  10
        Examination Examination 55 (55) 25
                1. Written examination 50  25
                2. Oral examination 5  0
Mandatory attendence parzicipation:

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Occurrence in study plans

Academic yearProgrammeField of studySpec.FormStudy language Tut. centreYearWSType of duty
2019/2020 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology P Czech Ostrava 1 Choice-compulsory study plan
2019/2020 (N2647) Information and Communication Technology (2612T059) Mobile Technology P Czech Ostrava 1 Optional study plan
2019/2020 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology K Czech Ostrava 1 Choice-compulsory study plan
2019/2020 (N2647) Information and Communication Technology (2612T059) Mobile Technology K Czech Ostrava 1 Optional study plan
2018/2019 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology P Czech Ostrava 1 Choice-compulsory study plan
2018/2019 (N2647) Information and Communication Technology (2612T059) Mobile Technology P Czech Ostrava 1 Optional study plan
2018/2019 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology K Czech Ostrava 1 Choice-compulsory study plan
2018/2019 (N2647) Information and Communication Technology (2612T059) Mobile Technology K Czech Ostrava 1 Optional study plan
2017/2018 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology P Czech Ostrava 1 Choice-compulsory study plan
2017/2018 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology K Czech Ostrava 1 Choice-compulsory study plan
2017/2018 (N2647) Information and Communication Technology (2612T059) Mobile Technology P Czech Ostrava 1 Optional study plan
2017/2018 (N2647) Information and Communication Technology (2612T059) Mobile Technology K Czech Ostrava 1 Optional study plan
2016/2017 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology P Czech Ostrava 1 Choice-compulsory study plan
2016/2017 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology K Czech Ostrava 1 Choice-compulsory study plan
2016/2017 (N2647) Information and Communication Technology (2612T059) Mobile Technology P Czech Ostrava 1 Optional study plan
2016/2017 (N2647) Information and Communication Technology (2612T059) Mobile Technology K Czech Ostrava 1 Optional study plan
2015/2016 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology P Czech Ostrava 1 Choice-compulsory study plan
2015/2016 (N2647) Information and Communication Technology (2612T059) Mobile Technology P Czech Ostrava 1 Optional study plan
2015/2016 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology K Czech Ostrava 1 Choice-compulsory study plan
2015/2016 (N2647) Information and Communication Technology (2612T059) Mobile Technology K Czech Ostrava 1 Optional study plan
2015/2016 (N2649) Electrical Engineering (2612T015) Electronics K Czech Ostrava 1 Optional study plan
2015/2016 (N2649) Electrical Engineering (2612T015) Electronics P Czech Ostrava 1 Optional study plan
2015/2016 (N2649) Electrical Engineering (2612T003) Applied Electronics K Czech Ostrava 1 Optional study plan
2015/2016 (N2649) Electrical Engineering (2612T003) Applied Electronics P Czech Ostrava 1 Optional study plan
2014/2015 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology P Czech Ostrava 1 Choice-compulsory study plan
2014/2015 (N2647) Information and Communication Technology (2612T059) Mobile Technology P Czech Ostrava 1 Optional study plan
2014/2015 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology K Czech Ostrava 1 Choice-compulsory study plan
2014/2015 (N2647) Information and Communication Technology (2612T059) Mobile Technology K Czech Ostrava 1 Optional study plan
2014/2015 (N2649) Electrical Engineering (2612T015) Electronics K Czech Ostrava 1 Optional study plan
2014/2015 (N2649) Electrical Engineering (2612T015) Electronics P Czech Ostrava 1 Optional study plan
2013/2014 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology P Czech Ostrava 1 Choice-compulsory study plan
2013/2014 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology K Czech Ostrava 1 Choice-compulsory study plan
2013/2014 (N2647) Information and Communication Technology (2612T059) Mobile Technology P Czech Ostrava 1 Optional study plan
2013/2014 (N2647) Information and Communication Technology (2612T059) Mobile Technology K Czech Ostrava 1 Optional study plan
2013/2014 (N2649) Electrical Engineering (2612T015) Electronics P Czech Ostrava 1 Optional study plan
2013/2014 (N2649) Electrical Engineering (2612T015) Electronics K Czech Ostrava 1 Optional study plan
2012/2013 (N2649) Electrical Engineering (2612T015) Electronics P Czech Ostrava 1 Optional study plan
2012/2013 (N2649) Electrical Engineering (2612T015) Electronics K Czech Ostrava 1 Optional study plan
2012/2013 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology P Czech Ostrava 1 Choice-compulsory study plan
2012/2013 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology K Czech Ostrava 1 Choice-compulsory study plan
2012/2013 (N2647) Information and Communication Technology (2612T059) Mobile Technology P Czech Ostrava 1 Optional study plan
2012/2013 (N2647) Information and Communication Technology (2612T059) Mobile Technology K Czech Ostrava 1 Optional study plan

Occurrence in special blocks

Block nameAcademic yearForm of studyStudy language YearWSType of blockBlock owner
V - ECTS - mgr. 2014/2015 Full-time Czech Optional 401 - Study Office stu. block
V - ECTS - mgr. 2013/2014 Full-time Czech Optional 401 - Study Office stu. block
V - ECTS - mgr. 2012/2013 Full-time Czech Optional 401 - Study Office stu. block