Optical Telecommunications 1: Devices (Winter Semesters)

Syllabus of the lecture – Optical Telecommunications 1: Devices

1.       Introduction to Guided Wave Optics and Optical Communications Systems

Glass fiber technologies, Planar Lightwave Circuit (PLC) technologies, optical modes, waveguide dispersion, introduction to single-mode and multimode optics, mode diversity dispersion and distance bandwidth product.

2.       Waveguide Modes

Derivation of waveguide modes, scalar and vectorial field equations, metallic and dielectric waveguides, conformal mapping and bending losses.

3.       Planar Lightwave Circuits

Coupled mode theory, scattering and transmission matrices, directional couplers, Mach-Zehnder interferometers, optical resonators.

4.       Perturbation-Theory

Perturbative derivation of mode coupling coefficients, absorption losses, scattering losses and phase modulation. Derivation of perturbation theory of the scalar and vectorial wave equations. Super-modes of coupled systems.

5.       Fundamentals of Linear and Non-Linear Optics

The harmonic and anharmonic oscillator model. Derivation of dispersion and absorption. Kramers-Kronig relations. Nonlinear susceptibility, Kerr-effect, solitons, super-continuum generation, Pockels effect, second-harmonic generation, sum and difference frequency generations, four-wave mixing, Raman and Brillouin scattering, nonlinear effects in resonators.

6.       Lasers and Optical Amplifiers, Part I

Spontaneous and stimulated emission, emission and absorption cross-sections, population inversion, optical amplification in atomic media, erbium-doped fiber amplifiers (EDFA), homogeneous and inhomogeneous broadening of gain spectrum.

7.       Lasers and Optical Amplifiers, Part II

Laser rate equations, emission line width and lasing threshold, modelocked lasers,  optical amplification in semiconductors, quantum wells and quantum dots, Fabry-Perot lasers, DFB lasers, VCSEL, thermal effects and mode-hopping, laser dynamics and relaxation oscillation, shot noise and relative intensity noise, thermal noise in conventional light sources.

8.       Passive Optical Components, Part I

Fundamentals of diffractive optics, grating couplers, photonic crystals and Holey fibers.

9.       Passive Optical Components, Part II

Multimode interferometers (MMI), wavelength division multiplexers, arrayed waveguide gratings (AWG), Echelle gratings.

10.   Electro-Optic Modulators, Part I

Pockels effect, Mach-Zehnder modulators, phase-matching, transmissions-lines, chirp.

11.   Electro-Optic Modulators, Part II

Free carrier plasma effect, segmented drivers, bandwidth limitations, electro-absorption modulators, Franz-Keldysh effect, quantum confined Stark effect.

12.   Photodetectors

PIN photodetectors, avalanche photodetectors (APD), gain-bandwidth product, noise and bandwidth limitations in photodetectors.

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Download description (German) of Optical Telecommunications 1 and Optical Telecommunications 2 as PDF-File: Gliederung_Vorlesung_Optische_Telekommunikation

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