Fiber-optic Communication, SK2811 (SK3883)

General information

The lectures will due to COVID-19 be given Mondays and Thursdays 13.15-15.00 online via Zoom

https://kth-se.zoom.us/j/64198496401

As long as there is sufficient interest they will also simultaneously be given live at Cesium meeting room (Albanovägen 29, floor 5, room 5228) in newly built house 3 at Albanova. Due to the expected few students and COVID-19 no regular exercise classes are planned. However, after each lecture there will be time to ask questions about the exercises. Due to COVID-19 the laboratory works will also be replaced by simulation exercises.

Goal

The course content is knowledge of fibre-optical components and systems with application to communications.

Requirements

One written examination (TEN1; 6 credits) and one laboratory course (LAB1; 1.5 credits)

What is fibre-optic communication, and what is the course?

The high ways of the IT society are the optical fibres. An optical fibre can transport several terabit per second over thousands of kilometers. The limitations today are in the electronics. Fibre-optic communication is an established technique but is simultaneously in rapid technical development towards higher bit-rates and more complex networks. The course will give you the knowledge in order to understand both the fundamentals and the rapid development, that you as professional engineer can use the fibre optics efficiently. The course treats important devices as optical fibres, laser diodes, optical detectors, and receivers from physical and transmission system point of view. You will also learn how to optimise optical communication links and calculate the bit error rate.

Aim

The course content is knowledge of fibre-optical components and systems with applications to communications. The transmission systems relevant parameters of devices are derived from physical descriptions, and form the basis for designing fibre-optic links. After a completed course, the participants should be able to:
- understand, describe, analyse, and compare the most important devices: optical fibres, light sources, and optical detectors
- design of digital fibre-optic links

Syllabus

Dielectric waveguides: Attenuation, wavelength dispersion, modes, fields. Light sources and optical amplifiers: Semiconductor laser, light-emitting diode, rate equations, output power, modulation response, chirp, noise, optical amplifiers. Detectors: PIN-diode, avalanche diode, responsivity, bandwidth, noise. Transmission systems: Optical links, direct detection systems, soliton systems, coherent systems, dispersion limitations, attenuation limitations, additive noise, signal dependent noise, bit error rate, optical networks.

Prerequisites

It is anticipated that the students are acquainted with:

Waveguides: Wave equation and the concept of modes.
Solid-state electronics: p-n-junction
Circuit theory: Impulse response, convolution, transfer function of linear systems.
Signal theory: Auto correlation function, power spectral density

Required reading

Fibre-Optic Communication Systems, third edition or fourth edition, Wiley, by Agrawal. It can be downloaded as a pdf via your KTH account: http://kth-primo.hosted.exlibrisgroup.com/
Printed versions (new or used) can be found at e.g.www.amazon.de, www.addall.com, www.cdon.com, www.bokus.com. Supplementary course material: problems with solutions, manuals for the laboratory, and exams are available as pdf-files on course homepage.

Reading instructions

The contents of the course book are comprehensive. Most chapters start at a rather elementary level but end at a rather advanced level. Some parts in the book are near the research front and are more suitable for advanced courses. The focus of the course is defined by the lectures and the problems in the supplementary course material. Some parts of the book are not included or only briefly discussed.

4th edition:
Following parts are not included in this course: 8.5, 9.2.2-9.3.5, Chapter 11

Following parts can be read selectively: 9.5

Write down in the book the numerical values of common natural constants such as c, k, h, e. Use SI-units.

Teaching method

The course is given in a traditional way, i.e. with lectures followed by corresponding exercises. If the number of students are less than 8, only lectures will be given. There are also two laboratory works. The language is English.

Course webpage

https://kth.instructure.com/courses/20131

Staff

Course responsible: Richard Schatz, senior researcher, 08-7904069, rschatz@kth.se

Lecturers, exercises, laborations and exam: Richard Schatz

Official examiner: Urban Westergren

SK2811 HT20-1 Fiber-optical Communication