Lecture 1 - Lecture 1 Bit rate and bit rate length product...

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Lecture 1 Bit rate and bit rate length product A bit of history
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Smoke signals and Semaphores Telegraph - a digital format Telephone –Analog, Twisted pair wire Radio Coaxial Cable (Necessary for television) Microwave (Line of sight) Laser Optical Fiber Innovative Technologies
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Bit-rate Length Product
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Bit-Rate Length Product
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Innovations Diode laser Small {size of grain of salt} Fast Narrow Bandwidth Optical fiber Guided wave Low loss
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Material Science Improvements MgO ZnO CdO
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Driving Technologies 1 st Generation Invention of diode laser, Optical fiber First lasers λ ~.8 um, (other λ ’s hard to get at first) Multimode Edge emitting Fabry Perot cavity First optical fibers Multimode, due to large core size, High absorption due to purity of glasses and scattering due to manufacturing tolerances
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Loss in Optical Fiber
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Loss in Optical Fiber details
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Dispersion Pulse broadens as it travels due to different frequency components traveling at different velocities.
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This note was uploaded on 02/23/2012 for the course ECONOMICS 101 taught by Professor Marie during the Spring '12 term at Anna University Chennai - Regional Office, Coimbatore.

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Lecture 1 - Lecture 1 Bit rate and bit rate length product...

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