Fiber Optics Final Exam Questions and Answers

Fiber Optics Final Exam Questions and Answers Electromagnetic wave behavior is used to describe the propagation of light along the fiber in what theory? - Answer ️️ -Mode theory Compared to single mode fibers, multimode fibers have which of the following advantages? - Answer ️️ -ease of both making connections and launching light into them Only in multimode fibers does which of the following types of dispersion occur? - Answer ️️ - Modal When different colors of light travel through the fiber at different speeds, which of the following types of dispersion occurs? - Answer ️️ -Material In a step-index fiber, the refractive index profile of the fiber core has which of the following characteristics? - Answer ️️ -It is uniform over the fiber core In a graded-index fiber, the refractive index profile of the fiber core is best described by which of the following statements? - Answer ️️ -It is parabolic with a maximum index of refraction at the center and a minimum index of refraction at the core-cladding boundary In multimode fiber, all light rays have to propagate all of the way to the core cladding interface before they are reflected back toward the fiber axis. - Answer ️️ -False The attributes of the 62.5/125-μm fiber do NOT include which of the following factors? - Answer ️️ -Low source to fiber coupling efficiency What are the two basic types of single mode step-index fibers? - Answer ️️ -Matched and Depressed clad For wavelengths greater than its cutoff wavelength, a typical single mode fiber is allowed to propagate a total of how many modes, if any? - Answer ️️ -None Under what condition, if any, will the fiber cease to be single mode? - Answer ️️ -when the wavelength of the light is more than is greater than the cutoff wavelength The use of plastic-clad silica and all plastic fibers has what primary drawback? - Answer ️️ - Higher NA