HIGHLIGHTED-Fiber-Optics-Communications.docx

A optimum angle b angle of refraction c refracted

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A. optimum angle B. angle of refraction C. refracted angle D. critical angle 209. The higher the index number A. the higher the speed of light B. the lower the speed of light C. has no effect on the speed of light D. the shorter the wavelength propagation 210. The maximum angle in which external light rays may strike the air/glass interface and still propagate down the fiber. A. Acceptance cone half-angle B. Acceptance cone C. Critical angle D. Angle of incidence 211. It is the figure of merit used to measure the magnitude of the acceptance angle. A. acceptance angle B. numerical aperture C. index profile D. refractive index 212. The effect of a large magnitude of the numerical aperture A. The amount of external light the fiber will accept is greater. B. The amount of external light the fiber will accept is less. C. The amount of modal dispersion will be less. D. The amount of chromatic dispersion will be greater. 213. Only one path for light rays to take down the fiber A. Multimode B. Step-index C. Single mode D. Graded index 214. More than one path for light rays to take down the fiber A. Multimode B. Step-index C. Single mode D. Graded index 215. The three major groups of the optical system are A. the components, the data rate and the response time B. the source, the link and the receiver C. the transmitter, the cable and the receiver D. the source, the link and the detector 216. Infrared light has a wavelength that is A. less than 400 nm B. more than 700 nm C. less than 700 nm D. a little over 400 nm 217. How many modes possible with a multimode step- index with a core diameter of 50 um, a core refractive index of 1.6, a cladding refractive index of 1.584, and a wavelength of 1300 nm. A. 456 B. 213 C. 145 D. 372 218. It is a graphical representation of the magnitude of the refractive index across the fiber. A. mode B. index profile C. numerical aperture D. refractive index 219. A type of index profile of an optical fiber that has a central core and outside cladding with a uniform refractive index A. multimode B. graded index C. step-index
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D. single mode 220. A type of index of an optical fiber that has no cladding and whose central core has a non-uniform refractive index. A. graded index B. multimode C. single mode D. step-index 221. Results in reduction in the power of light wave as it travels down the cable. A. power loss B. absorption loss C. resistive loss D. heat loss 222. Which of the following is not a factor in cable light loss? A. reflection B. absorption C. scattering D. dispersion 223. It is analogous to power dissipation to copper cables, impurities in the fiber absorb the light and covert it to heat.
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