ocs 1-1 intro
DESCRIPTION
Optical communicationTRANSCRIPT
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Optical Communication Systems
Chapter 1: Introduction
Pham Quang Thai [email protected]
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Textbooks
Textbooks
[1] G. Keiser, Optical Fiber Communications, 3rd Edition, McGraw-Hill, 2000
References
[2] A. Yariv, Optical Electronics in Modern Communications, 5th Edition, Oxford University Press, 1997
[3] B. Saleh and M. Teich, Fundamentals of Photonics, Wiley, 1991
[4] G. P. Agrawal, Fiber-Optic Communication Systems, John Wiley & Sons, 1992
[5] R. Ramaswami and K. N. Sivarajan, Optical Networks A practical Perspective, 3rd Edition, Morgan Kaufmann Publishers, 2010
[6] J. Powers, Introduction to Fiber Optic Systems, 2nd Edition, McGraw-Hill, 1999
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Content
Why optical communications?
Evolution of Optical Communication Systems
Applications of optical communications
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Increasing Need for High-Capacity & Broadband Services
Cisco Forecasts of IP Traffic in 2017 (1 exabyte = 1018 byte) 4
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Transport of video on
demand, Internet video
streams and downloads,
and the exchange of
video and other files
through P2P.
Metro traffic will
surpass long haul
traffic
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Optical Fibers can provide needed solutions
Optical transmission system capacity 6
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Optical fiber ~ 1012 Hz bandwidth
~ 10-6 m in diameter
~ 10 kg/km
~ 10-1 dB attenuation
No EMI and crosstalk
Electrical Isolation
Security
Coaxial cable ~ 108 Hz bandwidth
~ 10-2 m in diameter
~ 1000 kg/km
~ 10 dB attenuation
Yes
No
No
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Evolution of Optical Communication Systems
First laser
First optical waveguide
1960s
Early optical network systems
1970s First
generation
SONET/SDH
1980s
Second generation
WDM
1990s
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s Source: LED, Multi-mode laser
Wavelength: 830 nm
Fiber: multi-mode fiber
Fiber length: ~ 10 km
Use repeater
Bit rate: ~ 50 Mbps
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80
s Source: multi-mode laser, single mode laser
Wavelength: 1310 nm
(MML), 1550 nm (SML)
Fiber: single-mode fiber
Fiber length: ~ 40 km
Use repeater
Bit rate: ~ 100 Mbps 1 Gbps
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90
s Source: single mode laser
Wavelength: 8-32 wavelengths
Fiber: single-mode fiber
Fiber length: ~ 80 km
Use amplifier
Bit rate: ~ 2,5 Gbps 2 Tbps
1960: T. Maiman demonstrated first laser at Hughes Research Laboratories.
1966: Kao and Hockham use optical glass fibers for laser light transmission.
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19
70
s Source: LED, Multi-mode laser
Wavelength: 830 nm
Fiber: multi-mode fiber
Fiber length: ~ 10 km
Use repeater
Bit rate: ~ 50 Mbps
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80
s Source: multi-mode laser, single mode laser
Wavelength: 1310 nm
(MML), 1550 nm (SML)
Fiber: single-mode fiber
Fiber length: ~ 40 km
Use repeater
Bit rate: ~ 100 Mbps 1 Gbps
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90
s Source: single mode laser
Wavelength: 8-32 wavelengths
Fiber: single-mode fiber
Fiber length: ~ 80 km
Use amplifier
Bit rate: ~ 2,5 Gbps 2 Tbps
1970: Corning Incorporated scientists Drs. Robert
Maurer, Donald Keck, and Peter Schultz invented the
first low-loss optical fiber, 10
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19
70
s Source: LED, Multi-mode laser
Wavelength: 830 nm
Fiber: multi-mode fiber
Fiber length: ~ 10 km
Use repeater
Bit rate: ~ 50 Mbps
19
80
s Source: multi-mode laser, single mode laser
Wavelength: 1310 nm
(MML), 1550 nm (SML)
Fiber: single-mode fiber
Fiber length: ~ 40 km
Use repeater
Bit rate: ~ 100 Mbps 1 Gbps
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90
s Source: single mode laser
Wavelength: 8-32 wavelengths
Fiber: single-mode fiber
Fiber length: ~ 80 km
Use amplifier
Bit rate: ~ 2,5 Gbps 2 Tbps
1976: Bell Labs developed first
room temperature semiconductor
lasers.
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19
70
s Source: LED, Multi-mode laser
Wavelength: 830 nm
Fiber: multi-mode fiber
Fiber length: ~ 10 km
Use repeater
Bit rate: ~ 50 Mbps
19
80
s Source: multi-mode laser, single mode laser
Wavelength: 1310 nm
(MML), 1550 nm (SML)
Fiber: single-mode fiber
Fiber length: ~ 40 km
Use repeater
Bit rate: ~ 100 Mbps 1 Gbps
19
90
s Source: single mode laser
Wavelength: 8-32 wavelengths
Fiber: single-mode fiber
Fiber length: ~ 80 km
Use amplifier
Bit rate: ~ 2,5 Gbps 2 Tbps
1987: University of Southampton developed Erbium doped fiber amplifier operating at 1550nm.
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Applications: entertainment, commercial, military, medical
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Space division multiplexing and beyond 1Tbps networking in 2014
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Course content
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Optical fiber Source Receiver Point-to-Point link
SONET/SDH - WDM
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Course outcomes
Correctly interpret and analyze essential photonic devices.
Correctly interpret and evaluate the performance of a single wavelength point-to-point optical link.
Correctly interpret and evaluate the performance of a WDM networks.
Utilizing specialized optical system simulation program such as Optisystem and Matlab, correctly design, simulate and evaluate an optical communication system
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Assessment Percent Note
Simulations 30% Grade in class
Final project 20% Group project
Final 50% Multiple choice (70~90 m)
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