EEC135_03_notes_1_intro_rev2

EEC135_03_notes_1_intro_rev2 - Chapter Chapter I...

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hapter I Chapter I Introduction General Overview ptical Fiber Communications Optical Fiber Communications Optical Fibers eview Review Maxwell’s Equations Rectangular Metallic Waveguides TE and TM modes Dispersion and loss Introduction to waves in communications Prof. S. J. Ben Yoo EEC 135 Lecture notes1_1 Copyright © S. J. B. Yoo All Rights Reserved Definitions
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Motivations for Optical Communications riving Forces for Optical Driving Forces for Optical Networking Rapid Growth of Internet, WWW, and data centric traffic Multimedia (high bandwidth & QoS) iber exhaust and Economics Fiber exhaust and Economics Optical Fiber Amplifiers Advancement in Optical Component Technologies Prof. S. J. Ben Yoo EEC 135 Lecture notes1_2 Copyright © S. J. B. Yoo All Rights Reserved Next Generation Internet
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Communications Systems Lucent 2001 EC ‘97 TOTAL CAPACITY 128 64 NTT '90 ujitsu ‘97 Ciena Ciena Lucent Tellium 2000 Lucent 2001 NEC ‘00 NEC 97 hannels 32 6 Bellcore '88 Ciena Lucent Cambrian MCI/Hitachi ‘97 Fujitsu 97 AT&T ‘97 Lucent f WDM C h 16 8 ONTC-2 '95 AT&T '85 AT&T '94 AT&T '94 Nortel lcatel Hitachi NTT ‘97 Number o 4 '89 ONTC-1 '94 Transmission Alcatel 2 1 '87 '91 '86 '85 '83 '80 Networking Prods. Prof. S. J. Ben Yoo EEC 135 Lecture notes1_3 Copyright © S. J. B. Yoo All Rights Reserved Channel Bitrate 10 Mb/s 100 Mb/s 1 Gb/s 10 Gb/s 100 Gb/s 1 Tb/s
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Optical Fibers Optical Fiber is a remarkable transmission medium with far superior performance compared to copper based electrical cables in transporting signals of high bit-rates over long distances . It is also far more reliable compared to electrical wires against corrosion and elements. Low Loss (~0.2 dB/km) Low Dispersion ( 17 ps/nm/km for SMF-28) Extremely wide bandwidth (>25 THz) In all aspects, the Optical Fibers have orders of magnitude superior performance parameters compared to copper wires. With the availability of Optical Fiber Amplifiers , such markable potentials of the Optical Fibers are far better Prof. S. J. Ben Yoo EEC 135 Lecture notes1_4 Copyright © S. J. B. Yoo All Rights Reserved remarkable potentials of the Optical Fibers are far better exploited now.
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Optical Fiber Structure core cladding buffer coating jacket Optical Fiber : a dielectric (normally cylindrical) waveguide that operates at optical frequencies. The ‘waveguiding’ in the fiber confines optical wave and allows a propagation over a (long) distance. Consists of CORE: the part that contains most of the guided wave energy (core index n 1 ) LADDING: e region surrounding the core for providing a CLADDING: the region surrounding the core for providing a waveguiding capability to the core (cladding index n 2 < n 1 ) BUFFER COATING: the elastic, abrasive resistant plastic material urrounding the cladding to provide mechanical protection and to isolate Prof. S. J. Ben Yoo EEC 135 Lecture notes1_5 Copyright © S. J. B. Yoo All Rights Reserved surrounding the cladding to provide mechanical protection and to isolate external irregularities.
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This note was uploaded on 11/02/2009 for the course EEC 135 taught by Professor Yoo during the Spring '09 term at UC Davis.

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EEC135_03_notes_1_intro_rev2 - Chapter Chapter I...

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