Electronics and communications engineering

41. Nonlinear effects which are defined by the intensity – dependent refractive index of the fiber are called as . . . . . . . .

Scattering effects
Kerr effects
Raman effects
Tomlinson effects

Detailed SolutionNonlinear effects which are defined by the intensity – dependent refractive index of the fiber are called as . . . . . . . .

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42. Which of the following statements best explain the concept of material absorption?

A loss mechanism related to the material composition and fabrication of fiber
A transmission loss for optical fibers
Results in attenuation of transmitted light
Causes of transfer of optical power

Detailed SolutionWhich of the following statements best explain the concept of material absorption?

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43. Skew rays follow a . . . . . . . .

Hyperbolic path along the axis
Parabolic path along the axis
Helical path
Path where rays changes angles at core-cladding interface

Detailed SolutionSkew rays follow a . . . . . . . .

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44. 3dB optical bandwidth is always . . . . . . . the 3dB electrical bandwidth.

Smaller than
Larger than
Negligible than
Equal to

Detailed Solution3dB optical bandwidth is always . . . . . . . the 3dB electrical bandwidth.

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45. What is different in case of cross-phase modulation from self-phase modulation?

Overlapping but same pulses
Overlapping but distinguishable pulses
Non-overlapping and same pulses
Non-overlapping but distinguishable pulses

Detailed SolutionWhat is different in case of cross-phase modulation from self-phase modulation?

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46. When light is described as an electromagnetic wave, it consists of a periodically varying electric E and magnetic field H which are oriented at an angle?

90 degree to each other
Less than 90 degree
Greater than 90 degree
180 degree apart

Detailed SolutionWhen light is described as an electromagnetic wave, it consists of a periodically varying electric E and magnetic field H which are oriented at an angle?

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47. Which equation is used to calculate MFD?

Maxwell's equations
Peterman equations
Allen Cahn equations
Boltzmann's equations

Detailed SolutionWhich equation is used to calculate MFD?

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48. The difference between the modes’ refractive indices is called as . . . . . . . .

Polarization
Cutoff
Fiber birefringence
Fiber splicing

Detailed SolutionThe difference between the modes’ refractive indices is called as . . . . . . . .

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49. Intermodal dispersion in multimode fibers is minimized with the use of step-index fibers.

TRUE
nan
nan
nan

Detailed SolutionIntermodal dispersion in multimode fibers is minimized with the use of step-index fibers.

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50. Practical pulse broadening value for graded index fiber lies in the range of . . . . . . . .

0.9 to 1.2 ns/km
0.2 to 1 ns/km
0.23 to 5 ns/km
0.45 to 8 ns/km

Detailed SolutionPractical pulse broadening value for graded index fiber lies in the range of . . . . . . . .

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