Ch3Sec1 - THE FIBER FORUM Fiber Optic Communications...

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THE FIBER FORUM Fiber Optic Communications JOSEPH C. PALAIS PRESENTED BY
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Joseph C. Palais 3.1 2 Chapter 3 LIGHTWAVE FUNDAMENTALS
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Joseph C. Palais 3.1 3 Section 3.1 Electromagnetic Waves Wave Properties velocity power polarization interference refraction
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Joseph C. Palais 3.1 4 Electromagnetic Waves The following graph shows a wave traveling in the z direction. On the figure, t 1 < t 2 < t 3 t 1 t 3 t 2 Electric Field Position (z)
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Joseph C. Palais 3.1 5 Electromagnetic Waves Waves traveling in the z direction are represented by the uniform plane wave equation: 29 ( kz t E E o - = ϖ sin (3.1) This is a solution of the wave equation . factor n propagatio 0 0 2 2 2 2 2 v k E v z E E k E = = + = + (3.2)
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Joseph C. Palais 3.1 6 Electromagnetic Waves The frequency is f = v/ λ The radian frequency is ϖ = 2 π f The wave amplitude is E 0 and the wave phase is φ = ϖ t-kz
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Joseph C. Palais 3.1 7 Electromagnetic Waves Relationships for the Propagation Factor k v = c/n k = ϖ /v = ϖ /(c/n) = ϖ n/c In free space, n = 1, so that k = k o = ϖ /c In general, then k = k o n
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Joseph C. Palais
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This note was uploaded on 05/11/2010 for the course EEE EEE-448 taught by Professor Palais during the Fall '09 term at ASU.

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Ch3Sec1 - THE FIBER FORUM Fiber Optic Communications...

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