Top 150+ Solved Optical Communication MCQ Questions Answer
Q. Which of the following statements best explain the concept of material absorption?
a. a loss mechanism related to the material composition and fabrication of fiber
b. a transmission loss for optical fibers
c. results in attenuation of transmitted light
d. causes of transfer of optical power
Q. Absorption losses due to atomic defects mainly include
a. radiation
b. missing molecules, oxygen defects in glass
c. impurities in fiber material
d. interaction with other components of core
Q. The effects of intrinsic absorption can be minimized by
a. ionization
b. radiation
c. suitable choice of core and cladding components
d. melting
Q. Which of the following is not a metallic impurity found in glass in extrinsic absorption?
a. fe2+
b. fe3+
c. cu
d. si
Q. How the potential macro bending losses can be reduced in case of multimode fiber?
a. by designing fibers with large relative refractive index differences
b. by maintaining direction of propagation
c. by reducing the bend
d. by operating at larger wavelengths
Q. measurements give an indication of the distortion to the optical signals as they propagate down optical fibers.
a. attenuation
b. dispersion
c. encapsulation
d. frequency
Q. How many types of mechanisms are present which produce dispersion in optical fibers?
a. three
b. two
c. one
d. four
Q. In the single mode fibers, the dominant dispersion mechanism is
a. intermodal dispersion
b. frequency distribution
c. material dispersion
d. intra-modal dispersion
Q. Devices such as are used to simulate the steady-state mode distribution.
a. gyrators
b. circulators
c. mode scramblers
d. attenuators
Q. The time domain dispersion measurement setup involves as the photo detector.
a. avalanche photodiode
b. oscilloscope
c. circulator
d. gyrator
Q. In pulse dispersion measurements, the 3dB pulse broadening for the fiber is 10.5 ns/km and the length of the fiber is 1.2 km. Calculate the optical bandwidth for the fiber.
a. 32 mhz km
b. 45 mhz km
c. 41.9 mhz km
d. 10 mhz km