NONLINEAR OPTICS
Stampa
Enrollment year
2021/2022
Academic year
2021/2022
Regulations
DM270
Academic discipline
FIS/03 (MATERIAL PHYSICS)
Department
DEPARTMENT OF ELECTRICAL,COMPUTER AND BIOMEDICAL ENGINEERING
Course
ELECTRONIC ENGINEERING
Curriculum
Photonics
Year of study
Period
2nd semester (07/03/2022 - 17/06/2022)
ECTS
6
Lesson hours
45 lesson hours
Language
English
Activity type
ORAL TEST
Teacher
TARTARA LUCA (titolare) - 6 ECTS
Prerequisites
Basics of electromagnetic theory and photonics
Learning outcomes
The subject of the course is the description of nonlinear interaction of laser with matter aimed to the understanding of the working principles of integrated optical devices performing wavelength conversion, modulation, and logical functions. The applications of nonlinear optics to information technology, environmental monitoring, and biomedical sciences are also treated.
Course contents
Second-order nonlinear phenomena
Nonlinear propagation in the paraxial approximation. Phase-matching conditions. Second harmonic generation. Parametric amplification and oscillation. Wavelength conversion of ultrashort pulses: spectral acceptance, temporal walk-off. Materials for nonlinear optics. Phase-matching techniques.

Third-order nonlinear phenomena
Third harmonic generation. Optical Kerr effect, self focusing, self phase modulation. Four-wave mixing: wavelength conversion, optical phase conjugation.

Ultrashort pulses
Relation between pulsewidth and spectral bandwidth. Nonlinear propagation of ultrashort pulses in optical fibers. Temporal solitons. Measurement of pulsewidth via correlations.

Coherence and correlation
Classical definition of temporal and spatial coherence. Measurement techniques. Definition by Glauber: higher-order correlation functions. Heterodyne technique. Comparison between lasers and conventional light sources.

Spontaneous and stimulated light scattering
Static and dynamic Rayleigh scattering. Raman and Brillouin scattering. Scattering by Brownian and flowing particles. Doppler velocimetry. LIDAR techniques for environmental monitoring. Laser trapping. Biomedical applications. Stimulated Raman and Brillouin scattering. Raman amplifiers and oscillators. CARS technique.
Teaching methods
Lectures (hours/year in lecture theatre): 45
Practical class (hours/year in lecture theatre): 0
Practicals / Workshops (hours/year in lecture theatre): 0
Reccomended or required readings
G. New. Introduction to Nonlinear Optics. Cambridge University Press, 2011.

R.W. Boyd. Nonlinear Optics. Academic Press, London, 2003.

A. Yariv. Quantum Electronics. Wiley, New York, 1989.
Assessment methods
Oral examination about the topics of the course aimed at assessing the degree of comprehension of the student.
Further information
Oral examination about the topics of the course aimed at assessing the degree of comprehension of the student.
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The goals