PHOTONICS
(objectives)
The course provides students with the basic knowledge of light generation, detection and propagation in free space and through guiding media. Starting from the fundamentals of geometrical, paraxial and quantum optics, the main features of passive and active photonic devices are analysed; such as spectrometers, interferometers, optical fibers, lasers, LED, photodetectors,… evidencing for each of them the performances and critical issues.
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Code
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20801989 |
Language
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ITA |
Type of certificate
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Profit certificate
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Credits
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9
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Scientific Disciplinary Sector Code
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ING-INF/03
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Contact Hours
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72
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Type of Activity
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Core compulsory activities
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Teacher
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CINCOTTI GABRIELLA
(syllabus)
• Reflection and interference phenomena Maxwell's equations; Helmholtz’s equation; constitutive equations; spherical and plane waves; reflection and refraction laws; total internal reflection; Fresnel coefficients; etalon; Fabry Perot interferometer; interference between two or more waves; diffractive gratings; thin lens; spherical mirrors; image formation.
• Guided wave optics Planar waveguides: dispersion equation; optical modes; coupled waveguides. Optical fibers: modes in a step-index fiber; multimode fibers; chromatic dispersion; non-linear effects: SPM, XPM, FWM, Raman scattering; WDM; design guidelines.
• Photonic Integrated circuits Planar lightwave circuit (PLC) devices: power splitters; directional couplers; Mach Zehnder interferometer; optical filters; wavelength multiplexers; MMI coupler, Bragg grating,
• Wave optics Plane wave expansion; angular spectrum representation; Rayleigh-Sommerfeld equation; Fresnel and the Fraunhofer approximation; diffraction from a rectangular and a circular aperture; paraxial wave equation; Gaussian beams; optical resonators; effect of a lens on a Gaussian beam; effect of a lens on the field propagation; optical resolution.
• Imaging and spectroscopy Image formation with coherent and incoherent illumination; resolving power; numerical aperture; cameras; microscopes; optical spectrometer; blazed gratings; Fourier spectroscopy.
• Polarization and optical anisotropy Polarization states; Jones calculus; Stokes parameters; Poincarè sphere; anisotropic crystals; half-wave plate, quarter-wave plate; liquid crystals.
• Laser and LED Einstein equations; absorption and emission in a semiconductor; optical density of the states; LED, OLED; semiconductor lasers; rate equations; FP and DFB lasers.
• Optical Receivers PIN and avalanche photodiodes; noise; bit error rate (BER); Q parameter; eye diagram; sensitivity; quantum limit of photodetection.
(reference books)
Gori - Elementi di ottica Dispense fornite dal docente
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Dates of beginning and end of teaching activities
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From 27/09/2021 to 21/01/2022 |
Delivery mode
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Traditional
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Attendance
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not mandatory
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Evaluation methods
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Written test
Oral exam
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