hw9_p5406_s10 - HW 9 Phys5406 S10 due 4/15/10 1) An optical...

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Unformatted text preview: HW 9 Phys5406 S10 due 4/15/10 1) An optical fiber has the shape of a right circular cylinder of transparent material of index of refraction n. a) If all light that enters one end face is to be transported to the other end face, what is the minimum value of n = nmin ? b) If n = 0.9nmin , what is the largest angle of incidence for which no light is lost? c) Suppose the fiber is clad with a very thin coating of material n′ > n Show that the same amount of light makes it to the other end as in part b. d) Nevertheless such fibers are clad and more light is collected. This is due to a special property of cladding material that hasn’t been touched on. What do you think such property could be? 2) JDJ 7.2 (b) 3) JDJ 7.2 (b), but let n1 and n3 be reversed. 4) JDJ 7.3. I interpret the question to be that there are two cases i) EI = E , ii)EI = E⊥ . Do parts a and b for each case. Don’t sketch as JDJ suggests, use Mathematica or something else and plot the results. Use n=1.5 with critical angle 41.8 deg and plot your results for incident angles = 42 and 45 deg. 1 ...
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This note was uploaded on 12/24/2011 for the course PHYS 5406 taught by Professor Blecher during the Spring '10 term at Virginia Tech.

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