2021 Optical Communication Systems

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Academic unit or major
Graduate major in Electrical and Electronic Engineering
Uenohara Hiroyuki  Koyama Fumio 
Course component(s)
Lecture    (ZOOM)
Day/Period(Room No.)
Mon1-2()  Thr1-2()  
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Offered quarter
Syllabus updated
Lecture notes updated
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Course description and aims

This course explains the components for constructing a large capacity optical communication system, transmitter (intensity modulation, coherent modulation) performance, transmission system design (transmission limits due to fiber dispersion properties, transmission limits due to signal-to-noise ratio limits), long-haul transmission with optical amplifiers, multiplexing for large capacity transmission, optical switching, optical routing, etc.
The instructor will give an overview of not only the large capacity system backbone, but also the prospects for optical interconnection and next-generation networks, while interspersing examples.
Modulation technology used in optical communication systems has much in common with wireless transmission technology, such that knowledge from this course can be leveraged for broad applications. Transmission technology limits for optical signals is a field expanding its reach to within devices and inter-chip transmission, such that knowledge from this course can also be applied to related design technology.

The main technology for optical communication systems is an application based on optical properties of semiconductors in devices, and properties of optical fibers can be used for understanding electromagnetic wave analysis, and transmission by optical fibers can be used for understanding the frequency transfer function of a medium. Students will learn applications of the basic mathematical methods and knowledge learned in electrical and electronic engineering, and the methods and knowledge will also have versatile applications apart from those in optical communications.

Student learning outcomes

Students can acquire the fundamental skills of wide range of the optical fiber communication technologies as follows;

(1) Ability to explain various kinds of optical fiber communication systems and their differences
(2) Ability to use coding, modulation/demodulation, and detection technologies in simulation
(3) Ability to analyze the properties of optical fibers such as waveguiding and modes
(4) Ability to analize the limitation of transmission for optical fiber communication and distorsion compensation
(5) Ability to analyze the performance through bit error rate
(6) Ability to explain and use knowledges of optical amplifier and WDM technologies in simulation


optical sommunication systems, optical signal modulation/demodulation, transmission, optical amplification, wavelength division multiplexing, optical switching

Competencies that will be developed

Specialist skills Intercultural skills Communication skills Critical thinking skills Practical and/or problem-solving skills

Class flow

In the beginning of every class, the exercise problems from the previous class are explained. The instructor then lectures on the content for each class. In the second part of the class, students grapple with exercise problems for the relevant content. Do not neglect reviewing.

Course schedule/Required learning

  Course schedule Required learning
Class 1 Optical Communication Systems (Fundamentals) Carefully read and understand materials (class 1) on T2SCHOLA
Class 2 Optical Communication Systems (Long-Haul Transmission Systems) Carefully read and understand materials (class 2) on T2SCHOLA
Class 3 Optical Communication Systems (Metro-Core, Access Network) Carefully read and understand materials (class 3) on T2SCHOLA
Class 4 Optical Modulation Codes Read through Text (Class 4) on T2SCHOLA before lecture, and PN code expression
Class 5 Optical Modulation/Demodulation (Intensity Modulation, Phase Modulation) Read through Text (Class 5) on T2SCHOLA before lecture, and expression of signal equation and spectrum
Class 6 Digital Coherent Technologies Read through Text (Class 6) on T2SCHOLA before lecture, and understanding of functional blocks
Class 7 Transmission (Dispersion, Dispersion Limit, Dispersion Compensation) Read through Text (Class 7) on T2SCHOLA before lecture, and understand relationship between dispersion, bandwidth, compensation technologies
Class 8 Bit Error Rate (Intensity Modulation/Direct Detection) Read through Text (Class 8) on OCW-i before lecture, and analyze bit error rate
Class 9 Bit Error Rate (Coherent Detection, Multi-Level Modulation) Read through Text (Class 9) on OCW-i before lecture, and comparison of bit error rate performance between methods
Class 10 Optical Amplifier and Transmission Limit Read through Text (Class 10) on OCW-i before lecture, and understand operating principle of optical amplifier, transmission limit
Class 11 Optical Switching Read through Text (Class 11) on OCW-i before lecture, and understand the optical switching technologies
Class 12 Datacenter Network Technologies Read through Text (Class 12) on OCW-i before lecture, and understand the datacenter network technologies
Class 13 Optical Interconnection Read through Text (Class 13) on OCW-i before lecture, and understand optical interconnection technologies
Class 14 Advanced Technologies Read through Text (Class 14) on OCW-i before lecture, and understand advanced technologies

Out-of-Class Study Time (Preparation and Review)

To enhance effective learning, students are encouraged to spend approximately 100 minutes preparing for class and another 100 minutes reviewing class content afterwards (including assignments) for each class.
They should do so by referring to textbooks and other course material.


Lectures are given based on materials created by the instructor. Materials are made available on OCW-i or T2SCHOLA in advance. Please get materials from the site that each lecturer inform you of.

Reference books, course materials, etc.

Yasuharu Suematsu, Kenichi Iga, "Fundamentals of optical fiber communication", 5th edition, Ohm-sha, ISBN 978-4-274-22094-4
Mitsutoshi Hatori, Tomonori Aoyama, "光通信工学(1)(2)", Corona Pubnlishing Co., Ltd., ISBN 4339011436
"Fiber Optic Communication Systems", Govind P. Agrawal, Wiley-Interscience, ISBN 0470505117

Assessment criteria and methods

Students are evaluated on understanding of the structure of optical communication systems, modulation, transmission, and product quality evaluations.
Points are given for reports (80%) and exercises (20%).

Related courses

  • EEE.S341 : Communication Theory (Electrical and Electronic Engineering)
  • EEE.S351 : Signal System
  • EEE.S361 : Optoelectronics
  • EEE.S411 : Guided Wave Circuit Theory
  • EEE.D461 : Optoelectronics

Prerequisites (i.e., required knowledge, skills, courses, etc.)

Students are requested to complete Fourier and Laplace Transform (EEE.M211), Electromagnetic Wave Theory I (EEE.E201), Optoelectronics(EEE.S361). Or they should have the comparative knowledge level about those theories.

Contact information (e-mail and phone)    Notice : Please replace from "[at]" to "@"(half-width character).

Hiroyuki Uenohara uenohara.h.aa[at]m.titech.ac.jp
Fumio Koyama koyama.f.aa[at]m.titech.ac.jp

Office hours

(Uenohara, Koyama) Please make an appointment through email

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