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.
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, mode, transmission, optical amplification, wavelength division multiplexing, optical switching
|Intercultural skills||Communication skills||Specialist skills||Critical thinking skills||Practical and/or problem-solving skills|
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|
|Class 1||Optical Communication Systems (Fundamentals)||Carefully read and understand materials (class 1) on OCW-i|
|Class 2||Optical Communication Systems (Long-Haul Transmission Systems, Metro-Core)||Carefully read and understand materials (class 2) on OCW-i|
|Class 3||Optical Communication Systems (Access, Data-Center Network)||Carefully read and understand materials (class 3) on OCW-i|
|Class 4||Optical Modulation Codes||Read through Text (Class 4) on OCW-i before lecture, and PN code expressionequation and spectrum.|
|Class 5||Optical Modulation/Demodulation (Intensity Modulation, Phase Modulation)||Read through Text (Class 5) on OCW-i before lecture, and expression of signal equation and spectrum|
|Class 6||Optical Modulation/Demodulation (Digital Coherent Technologies)||Read through Text (Class 6) on OCW-i before lecture, and understanding of functional blocks|
|Class 7||Modes in the Optical Fiber (Wave Equation)||Read through Text (Class 7) on OCW-i before lecture, and analyze wave equation|
|Class 8||Transmission (Dispersion, Dispersion Limit)||Carefully read and understand materials (class 8) on OCW-I, dispersion and bandwidth|
|Class 9||Fiber Transmission (Fiber Nonlinearity and Dispersion Compensation)||Carefully read and understand materials (class 9) on OCW-I, dispersion compensation|
|Class 10||Optical Amplifiers||Carefully read and understand materials (class 10) on OCW-I, operating principle of optical amplifier|
|Class 11||Bit Error Rate (Intensity Modulation/Direct Detection)||Carefully read and understand materials (class 11) on OCW-I, bit error rate|
|Class 12||Bit Error Rate (Coherent Detection, Multi-Level Modulation, Optical Amplifier)||Carefully read and understand materials (class 12) on OCW-I, comparison of bit error rate performance between methods|
|Class 13||Wavelength Division Multiplexing (Dispersion Management)||Carefully read and understand materials (class 13) on OCW-I, issues of WDM technologies|
|Class 14||Wavelength Division Multiplexing (Modulation)||Carefully read and understand materials (class 14) on OCW-I, comparison of performance of WDM between modulation|
|Class 15||Optical Switching, Advanced Technologies||Carefully read and understand materials (class 15) on OCW-I.|
Lectures are given based on materials created by the instructor. Materials are made available on OCW-i in advance.
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
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%).
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.