440-4215/02 – Optical Communications III (OK III)

Gurantor departmentDepartment of TelecommunicationsCredits6
Subject guarantorprof. RNDr. Vladimír Vašinek, CSc.Subject version guarantorprof. RNDr. Vladimír Vašinek, CSc.
Study levelundergraduate or graduateRequirementOptional
Year2Semesterwinter
Study languageEnglish
Year of introduction2015/2016Year 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 3+3
Combined Credit and Examination 8+4

Subject aims expressed by acquired skills and competences

Understand the function of optical transmission routes. 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

Summary

The subject gives an attention to optical detectors, optical amplifiers, how to project fiber optical communication systems, it describes coherent communication systems, WDM systems and soliton transmissions

Compulsory literature:

Senior,J.M.: Optical fiber communications - principles and practise. Prentice Hall Inc., 2. vydání, 1992, ISBN 0-13-635426-2; Ghatak,A.K., Thyagarajan,K.: Introduction to fiber optics. Cambridge University Press, 1.vydání, 1998, ISBN 0-521-577853; Agrawal,G.P.: Fiber optic communication systems. J.Wiley and Sons, 1. vydání, 1992, ISBN 0-471-54286-5

Recommended literature:

Filka,M.: Optoelectronics for telecommunications and informatics. ProfiberNetworking CZ,s.r.o., ISBN 987-80-86785-14-1

Way of continuous check of knowledge in the course of semester

Conditions for credit granting: Successfully passing of the two tests in exercises. Handover of all 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 simulations and succesfully managing of two tests.

Prerequisities

Subject has no prerequisities.

Co-requisities

Subject has no co-requisities.

Subject syllabus:

Lectures: Sources for optical communications-advanced description 1 - Intrinsic semiconductors:Fermi enrgy levels and number of charge carriers, charge carriers density, effective mass of electrons and holes, doped semiconductors, materials for optical communications, PN junction unbiased, density of electrons and holes, biased PN junction, direct and indirect transitions, conservation of energy and momentum law, E-k diagram, Einstein´s rate relations, two-levels systems, equilibrium radiation from two-levels system, relationship between spontaneous and stimulated radiation, emission and absorption of radiation, absorption coefficient and linear coefficient of material amplification Sources for optical communications-advanced description 2 - Conditions for light amplification, population inversion-description, population inversion and methods of its realisation, three levels and four levels systems, optical feedback, phenomena in optical resonator, threshold condition for laser amplification, losses in optical resonator, total amplification and population inversion, amplification coefficient for small signals Sources for optical communications-advanced description 3 - Efficiency of laser diodes-internal, external, differential, power, laser resonator efficiency, threshold amplification and linewidth, radiating and nonradiating recombinations and their influence to laser diodes efficiency, conditions for high laser efficiency, heterosctuctures and their function, efficiency in terms of an E-k diagram, characteristics of laser diodes, threshold current and operating current of laser diode, spectral properties of LDs, radiation patterns of LD, longitudinal and transverse modes of laser radiation, LD modulation Sources for optical communications-advanced description - 4 Theoretical limit of laser modulation rate, analog and digital modulation of LDs, rate equations of LD, relaxation oscillation of LD, Transfer function of LD, intensity modulation of LD, chirp, noise of LD, RIN and its description, transmitter modules, function block diagram, driving circuits of LD transmitters, link codes for data transmission, circuit solution of optical transmitters with LEDs and LDs Sources for optical communications-advanced description - 5 Modulation circuits, controlling and monitoring circuits, coupling light from LED transmitter, coupling light from laser transmitter, backreflection protection of LD, integral characteristic of optical transmitter-eye diagram, faults of optical transmitters and their consequences in eye-diagram, internal and external modulators, Mach-Zehnder modulator, elektroabsorption modulator Detectors and receivers for optical communications - advanced description 1 SNR a error rate of receiver, photodiode noise sources, shot noise, thermal noise, dark current, noise 1/f, noise equivalent circuit, total noise figure, normalised noise value, SNR for PIN photodiode, SNR for APD, dependence of SNR on APD amplification, noise equivalent power(NEP), bit error rate (BER), BER and decision threshold, error function(erf), complementary error function (erfc) Detectors and receivers for optical communications - advanced description 2 - BER description - Q parameter, relatioship between BER and SNR, BER versus Q parameter, minimum optical power - photodiode sensitivity, minimum number of photons per bit, quantum limit Receiver units for opticalcommunications Functional block diagram of optical receiver, input receiver unit, equivalent circuits of an optical front end, quantizer, clock recovery, decision circuit design, datasheets and parameters of optical receivers Components of fiber optic networks 1 Point to point links, fiber optical networks, TDM and WDM, addúdrop problems, repeters and amplifiers in optical networks and signal amplifiers, passive and active elements of fiber optical networks, transceivers for fiber optic networks, transmitter requirements in WDM networks, tunable lasers, receivers for optical networks, receiver requirements in WDM networks, amplifiers in optical networks, functional types of optical amplifiers, semiconductor optical amplifiers(SOA), SOA advantages and disadvantages Components of fiber optic networks 2 Fabry-Perot amplifier(FPA), travelling-wave amplifier(TWA), Gainf of FPA, gain of TWA, gain saturation, FPA bandwidth, TWA bandwidth, crosstalk, polarozation dependent gain, noise in optical amplifiers, amplified spontaneous emission ASE, datasheets and parameters of optical amplifiers Components of fiber optic networks 3 Erbium doped fiber amplifiers (EDFA), principle of operation, energy band structure, amplifier pumping, C-band and L-band, gain and noise in EDFAs, EDFA components, splicing of erbium-doped fibers, ways to reduce splicing loss, pump laser diodes, datasheets and parameters of EDFAs, other types of optical networks amplifiers Passive components of fiber optic networks 1 Fused biconical tapers and couplers, port configurations of couplers, characteristics of a WDM coupler, datasheets parameters of couplers, basics of WDM coupler theory, coupling length, phase mismatch, WDM multiplexers and demultiplexers, broadband narrowband WDM MUX/DEMUX Passive components of fiber optic networks 2 Mux/Dmux, WDM waveguide gratings, WDM diffrection gratings, Fiber Bragg grating (FBG), WDM MUX/DEMUX applications, Add/Drop MUX/DEMUX and routers, optical filters, thin-film filters, tunable filters, acoustooptical filters, optical isolators, optical circulator, attenuators, variable attenuator, datasheet parameters, optical switches and functional modules, wavelength converters Fiber optic systems and networks 1 Analog systems, direct intensity modulation, system planning, subcarrier intensity modulation, intensity modulation with two sidebands, frequency modulation, phase modulation, PAM, multiplex strategy Fiber optic systems and networks 2 Coherent and phase modulated systems, principles of coherent detection, modulation formats, demodulation principles, differential phase modulation, ASK, FSK, PSK heterodyne detection, ASK and PSK homodyne detection, interferometric direct detection DPSK, systems with multiple carriers, polarisation multiplex Exercises: Calculation of the sensitivity of photodiodes, quiz Calculation of SNR and BER Laboratories: Measurement of VA characteristics of LD and LED destination and bandwidth banned energy Measurement P / I characteristics of LED and LD and the temperature dependence Measurement of polarisation state and the LED lights LD The measurement of light distribution in space and the impact of obstacles to the distribution Measurement: SM fibre OTDR metro Measurement ratio of decay and insertion of optical attenuation thread detention of members Measurement of insertion of optical attenuation thread isolator Measurement of optical amplifiers thread Studying the properties of EDFA Temperature Mach-thread-optical interferometer Mach-Zehnders interferomotters Measurement of the spectral characteristics of LED and LD for different currents Measurement shift maximum wavelength LD with the current budicím-

Conditions for subject completion

Full-time form (validity from: 2012/2013 Winter semester)
Task nameType of taskMax. number of points
(act. for subtasks)
Min. number of points
Credit and Examination Credit and Examination 100 (100) 51
        Credit Credit 45  10
        Examination Examination 55 (55) 25
                Written exam Written examination 50  25
                Oral exam Oral examination 5  0
Mandatory attendence parzicipation:

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2019/2020 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology P English Ostrava 2 Choice-compulsory study plan
2019/2020 (N2647) Information and Communication Technology (2612T059) Mobile Technology P English Ostrava 2 Optional study plan
2019/2020 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology K English Ostrava 2 Choice-compulsory study plan
2019/2020 (N2647) Information and Communication Technology (2612T059) Mobile Technology K English Ostrava 2 Optional study plan
2018/2019 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology P English Ostrava 2 Choice-compulsory study plan
2018/2019 (N2647) Information and Communication Technology (2612T059) Mobile Technology P English Ostrava 2 Optional study plan
2018/2019 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology K English Ostrava 2 Choice-compulsory study plan
2018/2019 (N2647) Information and Communication Technology (2612T059) Mobile Technology K English Ostrava 2 Optional study plan
2017/2018 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology P English Ostrava 2 Choice-compulsory study plan
2017/2018 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology K English Ostrava 2 Choice-compulsory study plan
2017/2018 (N2647) Information and Communication Technology (2612T059) Mobile Technology P English Ostrava 2 Optional study plan
2017/2018 (N2647) Information and Communication Technology (2612T059) Mobile Technology K English Ostrava 2 Optional study plan
2016/2017 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology P English Ostrava 2 Choice-compulsory study plan
2016/2017 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology K English Ostrava 2 Choice-compulsory study plan
2016/2017 (N2647) Information and Communication Technology (2612T059) Mobile Technology P English Ostrava 2 Optional study plan
2016/2017 (N2647) Information and Communication Technology (2612T059) Mobile Technology K English Ostrava 2 Optional study plan
2015/2016 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology P English Ostrava 2 Choice-compulsory study plan
2015/2016 (N2647) Information and Communication Technology (2601T013) Telecommunication Technology K English Ostrava 2 Choice-compulsory study plan
2015/2016 (N2647) Information and Communication Technology (2612T059) Mobile Technology P English Ostrava 2 Optional study plan
2015/2016 (N2647) Information and Communication Technology (2612T059) Mobile Technology K English Ostrava 2 Optional study plan
2015/2016 (N2649) Electrical Engineering (2612T015) Electronics P English Ostrava 2 Optional study plan
2015/2016 (N2649) Electrical Engineering (2612T015) Electronics K English Ostrava 2 Optional study plan
2015/2016 (N2649) Electrical Engineering (2612T003) Applied Electronics P English Ostrava 2 Optional study plan
2015/2016 (N2649) Electrical Engineering (2612T003) Applied Electronics K English Ostrava 2 Optional study plan

Occurrence in special blocks

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V - ECTS - mgr. 2020/2021 Full-time English Optional 401 - Study Office stu. block
V - ECTS - mgr. 2019/2020 Full-time English Optional 401 - Study Office stu. block
V - ECTS - mgr. 2018/2019 Full-time English Optional 401 - Study Office stu. block
V - ECTS - mgr. 2017/2018 Full-time English Optional 401 - Study Office stu. block
V - ECTS - mgr. 2016/2017 Full-time English Optional 401 - Study Office stu. block
V - ECTS - mgr. 2015/2016 Full-time English Optional 401 - Study Office stu. block