
Course unit
OPTICAL AND QUANTUM COMMUNICATIONS
INP9087863, A.A. 2019/20
Information concerning the students who enrolled in A.Y. 2019/20
ECTS: details
Type 
ScientificDisciplinary Sector 
Credits allocated 
Core courses 
INGINF/03 
Telecommunications 
6.0 
Course unit organization
Period 
First semester 
Year 
1st Year 
Teaching method 
frontal 
Type of hours 
Credits 
Teaching hours 
Hours of Individual study 
Shifts 
Lecture 
6.0 
48 
102.0 
No turn 
Examination board
Board 
From 
To 
Members of the board 
1 A.A. 2019/2020 
01/10/2019 
15/03/2021 
CORVAJA
ROBERTO
(Presidente)
LAURENTI
NICOLA
(Membro Effettivo)
BADIA
LEONARDO
(Supplente)
BENVENUTO
NEVIO
(Supplente)
CALVAGNO
GIANCARLO
(Supplente)
ERSEGHE
TOMASO
(Supplente)
MILANI
SIMONE
(Supplente)
ROSSI
MICHELE
(Supplente)
TOMASIN
STEFANO
(Supplente)
ZANELLA
ANDREA
(Supplente)
ZANUTTIGH
PIETRO
(Supplente)
ZORZI
MICHELE
(Supplente)

Prerequisites:

Digital communications: principles and analysis of a digital link in terms of error probability.
Vector spaces.
Probability and theory of random processes. 
Target skills and knowledge:

Optical communications
The overall objective is to analyze the performance and get the capability of designing the link in classical optical fibre communications.
In detail the knowledge to be acquired is:
 the structure of the optical fibre and its parameters
 the optical sources: laser and LED
 the model of the optical link and its components
 the digital signal in the link and their characteristics
 the source of noises, in particular the shot noise
 the photon counting statistics, with photodetectors and optical amplifiers
 evaluation of the error probability
 principles of coherent optical communications
In terms of skills, the objectives are:
 Characterize the optical fibre and its main parameters and their impact on the communication system.
 Analyze the performance of a fibre communication system according to all the noise sources
 Characterize the shot noise and the excess noise in photodetectors and optical amplifiers.
 Analyze the optical link and evaluate the error probability
 Design the optical link
 Analyze the performance (error probability) of coherent systems
Quantum communications
The overall objective is to understand the principles of quantum communications systems, in particular with coherent states.
In detail the knowledge to be acquired is:
 Dirac's notation and the mathematics of Hilbert spaces: operators, spectral decomposition, projectors
 The postulates of quantum mechanics
 The theory of quantum measurements
 The model and the analysis tools of a quantum communications system
 The theory for the evaluation and the optimization od the error probability.
 Coherent states
 Evaluate the error probability of quantum communication systems with coherent states.
The skills to be acquired are:
 Acquire the use of the basic mathematical tools to operate on Hilbert spaces: operators, spectral decomposition, projectors
 Acquire the principles of quantum mechanics related to the theory of quantum measurements
 Acquire the capability to model a quantum communication system
 Characterize the quantum communication system in terms of error probability.
 Characterize coherent quantum states
 Use the mathematical tools of quantum measurements to compare the performance of classical and quantum communication systems with coherent states 
Examination methods:

Written exam at the end of the course. Possible intermediate exam. Optional project developed in Matlab, to solve some case studies. 
Assessment criteria:

The evaluation will be based on the solution of exercises that assess the capacity of designing and analysis, with a weight of about 60% for classical optical communications and about 40% to asses the knowledge of the mathematical tools for the analysis of quantum communications.
Up to 30% of the evaluation can be associated to an optional project developed in Matlab (or Python or other programming language). 
Course unit contents:

1. Optical communication systems
2. Characteristics of the optical fibre
3. Impulses in the optical digital link
4. Poisson processes and shot noise characterization
5. Error probability
6. Optical amplification
7. Coherent optical transmission
8. Review of the principles of quantum mechanics
9. Hilbert spaces: operators and projectors, spectral decomposition
10. Quantum measurements and optimization of the measurements
11. Quantum decision theory and application to quantum communications
12. Coherent states
13. Quantum telecommunication systems with coherent states
14. Applications of QTLC 
Planned learning activities and teaching methods:

Lectures. 
Additional notes about suggested reading:

Additional material on the Moodle website 
Textbooks (and optional supplementary readings) 

Gerd Keiser, Optical Fiber Communications. : McGrawHill Education, 2014.

Gianfranco Cariolaro, Quantum communications. : Springer, 2015.

S. C. Gupta, Textbook on optical fiber communication and its applications. : PHI Learning Pvt. Ltd., 2012.

Ivan Kaminow, Tingye Li, Alan E . Willner, Optical Fiber Telecommunications (Sixth Edition). : Elsevier, 2013. ISBN: 9780123969606

Innovative teaching methods: Teaching and learning strategies
 Lecturing
 Problem based learning
 Case study
 Problem solving
 Loading of files and pages (web pages, Moodle, ...)
Innovative teaching methods: Software or applications used
 Moodle (files, quizzes, workshops, ...)
 Matlab
Sustainable Development Goals (SDGs)

