Optical Fiber Communication MCQ (Part-2)

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Optical Fiber Communication MCQ

Optical Fiber Communication MCQ, Multiple Choice Questions on Optical Fiber Communication, Fiber Optics MCQ, GATE questions on Optical Fiber Communication, Objective Questions with answers on Fiber Optics, Objective Questions with answers on Optical Fiber Communication

Optical Fiber Communication MCQ (Part-1)

Multiple Choice Questions

Q.1. Intramodal dispersion is associated with

  • single-mode fibers
  • multi-mode fibers
  • coaxial cables
  • copper wires

Answer: single-mode fibers

Q.2. Modal Birefringence is the main cause of

  • chromatic dispersion
  • polarisation mode dispersion
  • modal dispersion
  • profile dispersion

Answer: polarisation mode dispersion

Q.3. A typical optical fiber cable has specified values of n1 = 1.82 and n2 = 1.73. The critical angle of incidence is calculated as

  • 71.90°
  • 0.95°
  • 18.1°
  • 1.81°

Answer: 71.90°

Q.4. Which out of the following options is not a non-linear effect in optical fiber communication?

  • Four Wave Mixing
  • Cross Phase Modulation
  • Rayleigh Scattering
  • Raman Scattering

Answer: Rayleigh Scattering

Q.5. In optical fibers, the term `dispersion’ also signifies

  • scattering
  • multiple reflections
  • distortion
  • broadening of pulse width

Answer: broadening of pulse width

Q.6. V-number signifies to

  • relative refractive index
  • relative velocity
  • normalized frequency
  • real function

Answer: normalized frequency

Q.7. If the wavelength of the light in optical fiber is 1.3 micrometers, then the material dispersion is

  • infinite
  • Zero
  • 40
  • –100

Answer: Zero

Q.8. Which of the following is not true for optical fiber?

  • high security
  • immunity to electrical noise
  • reduced size and weight
  • low performance

Answer: low performance

Q.9. Which of the following is not a part of chromatic dispersion?

  • Waveguide dispersion
  • Material Dispersion
  • Intramodal Dispersion
  • Intermodal dispersion

Answer: Intermodal dispersion

Q.10. (BxL) stand for

  • bandwidth distance product
  • bit distance product
  • bandwidth dispersion parameter
  • bandwidth distance parameter

Answer: bandwidth distance product

Q.11. For single-mode fibers, the preferred optical source is

  • LED
  • Laser
  • Maser
  • Transistor

Answer: Laser

Q.12. The V-number for a multimode step-index profile optical fiber is given as 8. How many modes can propagate through this fiber?

  • 64
  • 16
  • 8
  • 32

Answer: 32

Q.13. The scattering of light signifies the loss of optical energy, mainly because of one of the following reasons.

  • imperfections in fiber core
  • group velocity
  • time delay
  • atmospheric stress

Answer: imperfections in fiber core

Q.14. Typical optical wavelength, for which chromatic dispersion and fiber losses are almost zero, is

  • 1560.606 nm
  • 1552.52 nm
  • 1539.766 nm
  • 1332.45 nm

Answer: 1552.52 nm

Q.15. Light remains confined within the core of a simple optical fiber by one of the following phenomena.

  • total internal reflection
  • diffraction
  • Refraction
  • all of these

Answer: total internal reflection

Q.16. For long-distance fiber-optic communication networks, which one of the following types of optical fibers is preferred?

  • Single-mode step-index profile optical fiber
  • Multimode step-index profile optical fiber
  • Single-mode graded-index profile optical fiber
  • Multimode graded-index profile optical fiber

Answer: Single-mode step-index profile optical fiber

Q.17. For a triangular refractive index profile, the value of profile parameter is typically

  • zero
  • unity
  • two
  • infinity

Answer: unity

Q.18. Broadening of an optical pulse broadening which occurs due to intermodal dispersion can be minimized using

  • Single-mode step-index profile optical fiber
  • Multimode step-index profile optical fiber
  • Single-mode graded-index profile optical fiber
  • co-axial cables

Answer: Single-mode graded-index profile optical fiber

Q.19. Optical fiber communications is based on the principle of

  • total internal reflectance
  • laser technology
  • photo-electric effect
  • Tyndall effect

Answer: total internal reflectance

Q.20. When V-number is less than 2.405, then how many modes can an optical fiber support?

  • 1
  • 2
  • 3
  • Infinity

Answer: 1

Q.21. ____________ is used to cancel the effect of Chromatic Dispersion in an installed optical network

  • Dispersion Shifted Fiber
  • Polarization Maintaining Fiber
  • Dispersion Compensating Fiber
  • Dispersion Flattened Fiber

Answer: Dispersion Compensating Fiber

Q.22. Microbending losses in an optical fiber can be reduced

  • if radius of bending is controlled
  • by removing waveguide imperfections
  • by controlling the bend radius and removing waveguide imperfections
  • neither by controlling bend radius nor by removing waveguide imperfections

Answer: if radius of bending is controlled

Q.23. At zero-dispersion wavelength, which one of these is zero?

  • Polarization mode dispersion
  • Higher order dispersion
  • Intermodal dispersion
  • Chromatic dispersion

Answer: Chromatic dispersion

Q.24. The number of modes that are supported by parabolic refractive index profile optical fiber having normalized frequency parameter of 2.2 will be

  • 1
  • 2
  • 3
  • 4

Answer: 1

Q.25. The axial refractive index of the graded-index profile fiber core is specified as 1.50. If the maximum relative refractive index difference is 1%, then the index of refraction of the cladding is

  • 1.485
  • 1.50
  • It will depend on the profile parameter.
  • It will depend on the radius of the core.

Answer: 1.485

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