L5 - Optical Fiber Show Figure 2-7 Glass core is very thin....

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Optical Fiber Show Figure 2-7 Glass core is very thin. 50 microns, or in single mode fiber, 8-10 microns. Text says current practical limit is 10 Gb/second, primary limited - need for electrical/optical/electrical conversion. 100 Gb/sec. has been achieved in Lab, and > 50,000 Gb/second could be achieved.
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Instead of frequency, light signals are described in terms of wavelengths, ë . ë = c/f, where c is the speed of light, 3*10 8 meters/second. Wavelength bands for optical fiber are centered at 0.85, 1.3, and 1.55 microns. In these bands, attenuation is only about 0.2 dB per kilometer.
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1 micron = 10 meters. Thus, at 1.3 -6 microns, f = 3*10 /(1.3*10 ) = 2.31*10 herz! 8 -6 14 A deviation of 1 gigaherz = 10 hz from 9 this centeris less than 1/100,000 of the center frequency. The bands are about 25,000-35,000 gigaherz wide. Can send thousands of kilometers, small distortion The 0.85 micron band has more attenuation, but the materials and devices are cheaper.
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off pulses. Optical interfaces can be passive or
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This note was uploaded on 09/23/2009 for the course CMPEN 362 taught by Professor Johnmetzner during the Spring '09 term at Pennsylvania State University, University Park.

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L5 - Optical Fiber Show Figure 2-7 Glass core is very thin....

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