71. When the input and output power in an optical fiber is 120μW & 3μW respectively and the length of the fiber is 8 km. What is the signal attenuation per km for the fiber?
72. What is the unit of normalized frequency?
73. What does ISI stand for in optical fiber communication?
74. Which law gives the relationship between refractive index of the dielectric?
75. The variant of non-zero-dispersion-shifted fiber is called as . . . . . . . .
76. . . . . . . . . zsemiconductor laser sources generally have broader bandwidths.
77. Which of the following statements best explain the concept of material absorption?
78. How many mechanisms are there which causes absorption?
79. In the given equation, state what αr suggests?
80. For no overlapping of light pulses down on an optical fiber link, the digital bit rate BT must be . . . . . . . .
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