analysis_project_5

# analysis_project_5 - a n core = 1.57 n cladding = 1.42 b n...

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ECT 350 ELECTRONIC COMMUNICATIONS FIBER-OPTICS IN TECHNOLOGY ANALYSIS PROJECT 5 1. What applications are fiber optics used for? It is used by telecommunications companies to transmit telephone signals, Internet communication, and cable television signals. Also has a arge advantages over existing copper wire in long-distance and high-demand applications. 2. Which material has an index of refraction of 1.46? Silica glass 3. Why is refraction the mode of fiber-optic transmission? It is one of the ways that a light wave can be made to alter its course? 4. Calculate the critical angle for the following core-cladding index combinations:

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Unformatted text preview: a) n core = 1.57, n cladding = 1.42 b) n core = 2.0, n cladding = 1.80 c) n core = 1.33, n cladding = 1.00 d) n core = 1.75, n cladding = 1.55 = 1 2 1-critical n n sin a) sin-1 (1.42/1.57) = 64.8 b) sin-1 (1.80/2.0) = 64.2 c) sin-1 (1.0/1.33) = 48.8 d) sin-1 (1.55/1.75) = 62.3 5. Calculate the numerical aperture (NA) for each of the four combinations of refractive index given in Problem 4. a) 2 2 1.42-1.57 NA = = .67 b) 2 2 1.8-2.0 NA = = .87 c) 2 2 1.0-1.33 NA = = .88 d) 2 2 1.55-1.75 NA = = .81...
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analysis_project_5 - a n core = 1.57 n cladding = 1.42 b n...

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