Dispersion-shifted single mode fibers are created by __________a.Decreasing fiber core diameter and decreasing fractional index differenceb.Decreasing fiber core diameter and increasing fractional index differencec.Increasing fiber core diameter and increasing fractional index differenced.Increasing fiber core diameter and decreasing fractional index difference

The fibers which relax the spectral requirements for optical sources and allow flexible wavelength division multiplying are known as __________a.Dispersion-standardized single mode fiberb.Dispersion-compressed single mode fiberc.Dispersion-enhanced single mode fiberd.Dispersion-flattened single mode fiber

When more than one mode is propagating in an optical fiber, it is dispersed due to1 pointmaterial dispersionwaveguide dispersionall of these.intermodal dispersion

as radius of fiber increases the number of modes __________Select one:a. remains sameb. decreasec. increased. not dependent

Which of the following has more distortion1 pointGraded index fiberMultimode- step index fiberSingle Mode step-index fiberAll of these.

What is needed to predict the performance characteristics of single mode fibers?a. a.Geometric distribution of light in a propagating modeGeometric distribution of light in a propagating modeb. b.Fractional power flow in the cladding of fiberFractional power flow in the cladding of fiberc. c.Normalized frequencyNormalized frequencyd. d.The intermodal delay effectThe intermodal delay effect