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Technische Universität München

Optical Communication Systems

Vortragende/r (Mitwirkende/r)
Norbert Hanik
Bensu Baran-Akin
Ulrike Höfler
Nummer 0000005726
Art Vorlesung mit integrierten Übungen
Umfang 4 SWS
Semester Wintersemester 2025/26
Unterrichtssprache Englisch
Stellung in Studienplänen Siehe TUMonline
Termine Siehe TUMonline

Teilnahmekriterien

Siehe TUMonline

Lernziele

Optical Networks are the backbone of broadband communications. High-speed internet and Webbased services would be unthinkable without fiber-based optical technology. In this module the students gain profound insight into modern optical communications technology. At the end of the module students are able to understand and apply physical models of all relevant components of current optical communication systems.

They are capable to analyse the performance of optical communication systems with respect to transmission quality and signal perturbations, both analytically and by numerical simulation using Matlab programs that are elaborated and discussed during lecture and tutorial. The students have profound knowledge to design optical communication systems for given boundary conditions. Furthermore the students have gained insight into optimization of optical communication systems including all relevant linear and nonlinear transmission effects.

Beschreibung

General Structure of optical Wavelength-Division-Multiplexed-Transmission Systems.
Optical Transmitters and Modulators: LED, Diode-Laser, Direct Modulation.
Mach-Zehnder-Modulator: Amplitude-, Phase-, I/Q-Modulation, Polarization-Multiplex.
Physical properties of standard single mode fibres: Attenuation, Chromatic Dispersion, Polarisation Mode Dispersion. Physical origin and impact of fiber nonlinearities: Four-Wave Mixing, Raman Scattering, Self- and Cross-Phase Modulation.
Optical amplifiers: Semiconductor Amplifier, Raman-Amplifier, Erbium-Doped-Fiber Amplifier.
Optical filters.
Optical receiver: Direct Detection; Coherent Receiver.
Modelling of optical signal propagation using the Nonlinear Schroedinger Equation (NLS). Numerical solution of the NLS.
Performance evaluation of Optical Transmission Systems: Bit Error Ratio, system margin, system penalty. Optical/electrical equalization of signal distortions.
Optimized system design.

Inhaltliche Voraussetzungen

Differential / Integral calculus, Vector Analysis, signal representation in time and frequency domain, statistical methods of communications engineering, electromagnetic field theory.

Lehr- und Lernmethoden

The module is composed of a lecture (3SWS) and a tutorial (1SWS). In the lecture the topics are presented using power point and blackboard.
In the tutorial concrete problems are solved and additional examples are treated.

Teaching method:
During the lectures students are instructed in a teacher-centered style.
The students are encouraged to read supporting literature and apply the discussed analytical and numerical methods on their own PC using MatLab.
The exercises are held in a student-centered way.

The following kinds of media are used:
- Presentations
- Lecture notes
- Exercises with solutions as download

Studien-, Prüfungsleistung

During a written exam (90 min, closed book exam) students proof that they are able to apply physical models and methods of communications engineering to analyze and design optical communication systems, subsystems and components.

Empfohlene Literatur

The following literature is recommended:
- G. P. Agrawal: Fiber-Optic Communication Systems, Wiley-Interscience
- G. P. Agrawal: Nonlinear Fiber Optics, Wiley-Interscience

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