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OPKOM
Course: Optics Communication
Department/Abbreviation: OPT/OPKOM
Year: 2019
Guarantee: 'RNDr. Miroslav Ježek, Ph.D.'
Annotation: The course aims to explain fundamentals of optical communication systems. Theoretical as well as practical and technological aspects of information encoding, optical transmission and decoding will be discussed.
Course review:
Part I - Fundamentals
1. Intruduction to optical communications, fiber optics vs. conventional transmission lines, typical fiber-optic link; optical encoding of information, carrier, modulation, sidebands; temporal and spectral aspects; bit error rate, crosstalk, inter-symbol interference, eye diagram.
2. Modulation and demodulation of intensity/phase/frequency, homodyne and heterodyne detection, carrier recovery, phase lock loop; power spectral density, timing jitter and phase noise, Allan variance.
3. Multiplexing, wavelength-, polarization-, and spatial-division.
4. Low light limit, statistics, signal-to-noise ratio, attenuation and amplification.
Part II - Low level / Technology
5. Optical fibers (TIR,PBG,MM,SM,PM), modes, dispersion and disp.compensation, losses, polarization; nonlinear effects, fiber amplifiers, spont.emission, noise figure; materials and manufacturing.
6. Integrated devices, technology, hybrid IO; couplers, splitters, freq.filters+microresonators, AWG, modulators: electro-optical effects and free carier injection; IN/OUT coupling, SOI vs telecom fiber coupling problem; splicing, connectors.
7. Sources: LED, SLED, LD, VCSEL, DFB, DBR, monolithic vs hybrid, direct vs indirect band gap; P-I curve, spectral properties, modulation speed, statistics and noise; quantum wells and dots.
8. Detectors: photodiodes PN, PIN, APD, single-photon detectors; sensitivity, bandwidth, noise, NEP, linearity.
Part III - High level
9. Network topology and distances; passive networks vs repeaters vs amplifiers.
10. Transmitters (direct vs ext.modulator) and receivers, incoherent and coherent receivers.
11. Measurement methods, dispersion measurement, optical time-domain reflectometry.
12. Speed/capacity limitations, bandwidth-distance product, record speeds.