Sumários
Lesson nº10
13 Outubro 2020, 16:00 • Rita Sousa
Simulation of IM-DD system in back-to-back with a given extinction ratio and optical power incident on the PIN photodetector. Impact of receiver electrical filtering on the time waveform and eye diagram in the presence of noise. Optical amplifiers: Raman amplifiers, semiconductor optical amplifiers and Erbium doped fibre amplifiers. Modelling of optical amplifiers and generation of amplified spontaneous emission noise. Datasheet analysis. Optical signal-to-noise ratio.
7 students attended at room; 10 attended remotely.
Lesson nº9
13 Outubro 2020, 14:30 • Rita Sousa
Simulation of external modulation of digital signals with a given extinction ratio. Impact of receiver electrical filtering on the time waveform and eye diagram in the absence of noise. Modelling and simulation of shot noise and circuit noise in optical receivers.
7 students attended at room; 10 attended remotely.
Lesson nº8
6 Outubro 2020, 16:00 • Rita Sousa
Analytical derivation of linearized Mach-Zehnder modulator characteristic for the quadrature and minimum bias points. Photoreceivers. Modelling of PIN photodetectors and detected current. Laser, modulator and photodetector datasheets analyses. Introduction to external modulation of digital signals: analysis of the impact of linear and nonlinear conversion on the eye diagram through simulation.
10 students attended at room; 7 attended remotely.
Lesson nº7
6 Outubro 2020, 14:30 • Rita Sousa
Simulation of optical communication systems: main blocks. Optical transmitters: lasers, external and direct modulation. Datasheet analysis. Mach-Zehnder modulators: input-output characteristic, bias point, extinction ratio and frequency limitation.
10 students attended at room; 7 attended remotely.
Lesson nº6
29 Setembro 2020, 16:00 • Rita Sousa
Low-pass equivalent representation of signals and systems. Data sequences: geneartion and properties of pseudo random binary sequences and deBruijn sequences.
12 students attended at room; 4 attended remotely.