Optical communications

Higher education teachers: Vidmar Matjaž
Credits: 6
Semester: summer
Subject code: 64241

Subject description


General knowledge of the following:

  • Fundamentals of electrical engineering 1,2
  • Mathematics 1,2,3,4
  • Electrodynamics

Content (Syllabus outline):

Properties and limitations of metal transmission lines: twisted pair, coaxial cable and metal wave-guide, bandwidth and attenuation of coaxial cable. Reflection and refraction of electromagnetic waves on the boundary of two different dielectrics, implementation of a planar wave-guide, group delay, dispersion equation, and number of modes in a planar dielectric wave-guide. Multi-mode and single-mode optical fibers, raw materials and methods of fabrication, multi-mode, chromatic and polarization-mode dispersion, non-linear effects in optical fibers. Optical-network components: splitters, combiners, filters, diffraction gratings, wavelength multiplexers, light-wave isolators and circulators. Optical-source properties, longitudinal and transversal coherence, source modulation, source types: filament bulbs, gas-discharge bulbs, light-emitting diodes, gas and solid-state lasers and their properties. Light-wave modulators, electro-optical phase modulator, electro-optical amplitude modulator, electro-absorption modulator. Lightwave receivers: thermal, photo-resistors and photo-diodes, quantum efficiency, photo-resistor and photo-voltaic regimes, quantum and thermal noise of an optical receiver, implementations of different receivers, clock recovery, clock jitter. Optical amplifiers, fiber and solid-state amplifiers, Brillouin and Raman effects.

Objectives and competences:

Learning the fundamentals of guided-wave (wired) communications. Reasons to use optical fibers. Learning optical fibers and other components of optical networks: optical transmitters, optical modulators, optical receivers and optical amplifiers.

Intended learning outcomes:

Knowledge of guided-wave (wired) communications, principles and implementation of optical fibers and related terminal equipment: optical transmitters, modulators, receivers and amplifiers.

Learning and teaching methods:

Lectures to explain the theoretical background and laboratory experiments to practically confirm the theory in the spirit of team work.

Study materials


  1. J. Budin, Optične komunikacije, FE, Ljubljana, 1993.
  2. B. Batagelj, M. Vidmar, Optične komunikacije, Laboratorijske vaje, FE, Ljubljana, 2003.
  3. J. Budin, Sisitemi optičnih komunikacij, FE, Ljubljana, 1995.
  4. http://antena.fe.uni-lj.si/literatura/

Study in which the course is carried out

  • 1 year - 2nd cycle - Electrical Engineering - Information and Communication Technologies