Leila GRAINI

Teaching activities:

- Subject/ course : Optical fibers

Optical step index Fiber structure- Total internal reflection-Acceptance angle –Numerical aperture – Skew rays Ray Optics-Optical Fiber Modes - Overview of Modes-Key Modal concepts- Linearly Polarized Modes -Single Mode Fibers-Graded Index fiber structure. Cut- off Wave length – chromatic and modal dispersion- nonlinear effects.

- Subject/ course : Optical fiber communications

Historical evolution of optical fibre communications, Optical fibers, Transmitters (Semiconductor lasers vs. LEDs),  Optical modulators, Optical amplification,  Receivers (Photodetectors ), Optical communication links,  Receiver noise, Eye diagrams, bit error rates, Penalties, sensitivities, Direct vs. coherent detection, Modulation formats, spectral efficiency, Optical, Loss/gain and dispersion limitations,  Rise time and power budgets.

-Subject/ course : Optical networking

Basic Networks - Optical Network Components:  Couplers, Isolators & Circulators, Multiplexers & Filters, Optical Amplifiers, Switches, ROADM, OXC,  Wavelength Converters - Broadcast and select WDM Networks –Wavelength Routed Networks - WDM + EDFA system – Optical CDMA – passive optical access Networks PON, EPON and WDN GPON.

-Subject/ course : Optoelectronics devices

Direct and indirect Band gap materials- LED structures -Light source materials -, Modulation of a LED, lasers Diodes-Modes and Threshold condition - External Quantum efficiency - Resonant frequencies - Laser Diodes, Modulation of a Laser Diodes,  Temperature effects, Fiber amplifiers- Power Launching and coupling, PIN & PDA photodiodes.