Fiber Alignment and Joint Loss MCQ

Test your knowledge with important Fiber Alignment and Joint Loss MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Fiber Alignment and Joint Loss MCQs at Bissoy

• The intrinsic loss through a multimode fiber joint is independent of direction of propagation.
  ক

  True

  খ

  False
• In a single mode fiber, the losses due to lateral offset and angular misalignment are given by 0.20 dB and 0.46 dB respectively. Find the total insertion loss.
  ক

  0.66 dB

  খ

  0.26 dB

  গ

  0.38 dB

  ঘ

  0.40 dB
• Determine coupling efficiency if the misalignment loss in a graded index fiber is 0.102.
  ক

  0.136

  খ

  0.898

  গ

  0.982

  ঘ

  0.684
• A graded index fiber has a parabolic refractive index profile (α=2) and core diameter of 42μm. Estimate an insertion loss due to a 2 μm lateral misalignment when there is index matching and assuming there is uniform illumination of all guided modes only.
  ক

  0.180

  খ

  0.106

  গ

  0.280

  ঘ

  0.080
• A step index fiber has a coupling efficiency of 0.906 with uniform illumination of all propagation modes. Find the insertion loss due to lateral misalignment?
  ক

  0.95 dB

  খ

  0.40 dB

  গ

  0.42 dB

  ঘ

  0.62 dB
• Losses caused by factors such as core-cladding diameter, numerical aperture, relative refractive index differences, different refractive index profiles, fiber faults are known as ____________
  ক

  Intrinsic joint losses

  খ

  Extrinsic losses

  গ

  Insertion losses

  ঘ

  Coupling losses
• How many types of misalignments occur when joining compatible fiber?
  ক

  One

  খ

  Two

  গ

  Five

  ঘ

  Three
• Two joined graded index fibers that are perfectly aligned have refractive indices αR = 1.93 for receiving fiber αE = 2.15 for emitting fiber. Calculate the coupling loss.
  ক

  0.23 dB

  খ

  0.16 dB

  গ

  0.82 dB

  ঘ

  0.76 dB
• Two joined step index fibers are perfectly aligned. What is the coupling loss of numerical aperture are NAR= 0.26 for emitting fiber?
  ক

  -0.828 dB

  খ

  -0.010 dB

  গ

  -0.32 dB

  ঘ

  0.32 dB
• A particular GaAs fiber has a Fresnel reflection magnitude of 17.6% i.e. 0.176. Find the power loss between the source and the fiber?
  ক

  0.86 dB

  খ

  0.78 dB

  গ

  0.84 dB

  ঘ

  0.83 dB
• A GaAs optical source having a refractive index of 3.2 is coupled to a silica fiber having a refractive index of 1.42. Determine Fresnel reflection at interface in terms of percentage.
  ক

  13.4%

  খ

  17.4%

  গ

  17.6%

  ঘ

  14.8%
• The ratio r = (n1 – n)/(n1 – n) indicates ____________
  ক

  Fresnel reflection

  খ

  Reflection coefficient

  গ

  Refraction coefficient

  ঘ

  Angular power distribution coefficient
• A measure of amount of optical fiber emitted from source that can be coupled into a fiber is termed as ______________
  ক

  Radiance

  খ

  Angular power distribution

  গ

  Coupling efficiency

  ঘ

  Power-launching