440-4207/01 – Optoelectronics III (OPT III)
| Gurantor department | Department of Telecommunications | Credits | 6 |
| Subject guarantor | prof. RNDr. Vladimír Vašinek, CSc. | Subject version guarantor | prof. RNDr. Vladimír Vašinek, CSc. |
| Study level | undergraduate or graduate | Requirement | Optional |
| Year | 2 | Semester | winter |
| | Study language | Czech |
| Year of introduction | 2010/2011 | Year of cancellation | 2011/2012 |
| Intended for the faculties | FEI | Intended for study types | Follow-up Master |
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:
Recommended literature:
Additional study materials
Way of continuous check of knowledge in the course of semester
Podmínky udělení zápočtu:
Absolvování testu č.1 a testu č.2
Odevzdání všech protokolů z měření
E-learning
Other requirements
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
Lectures:
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
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 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
Fiberless optical networks
Atmosphere as a transmission media, phenomena limiting range and bit rate, directional and diffused networks, sources and detectors for fiberless networks, principles of design for fiberless networks
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
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction