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Lecture%2015%20Optical%20Fibers%20Intro

Lecture%2015%20Optical%20Fibers%20Intro - Photonic Devices...

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Photonic Devices and Systems, Lecture 15 1/12 Optical Fibers Unless otherwise noted, figures in this lecture are from Iizuka, Elements of Photonics
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Photonic Devices and Systems, Lecture 15 2/12
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Photonic Devices and Systems, Lecture 15 3/12 Optical Fibers for Telecommunications From Iizuka, Elements of Photonics
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Photonic Devices and Systems, Lecture 15 4/12
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Photonic Devices and Systems, Lecture 15 5/12 Theory of Optical Modes in Step Index Fibers
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Photonic Devices and Systems, Lecture 15 6/12 1 2 inside the core inside the cladding n n n = ˆ ˆ ˆ ˆ ˆ ˆ r z r z E E r E E z H H r H H z φ φ φ φ = + + = + + G G We find the modes by looking for solutions of: ( ) ( ) ( ) ( ) ( ) 2 2 2 2 0 0 2 2 2 2 0 2 2 2 2 0 2 ˆ 2 ˆ ˆ 0 r r r r z z E E E nk E E nk E r r r E E E nk E r r E nk E z φ φ φ φ φ φ φ + = + + + + + ∇ + = G G The equations have a simple physical interpretation.
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