Stability of the Fiber Transmission Characteristics

Optical Communications

This set of Optical Communications Interview Questions and Answers for Experienced people focuses on “Stability of the Fiber Transmission Characteristics”.

1. ____________ results from small lateral forces exerted on the fiber during the cabling process.
a) Attenuation
b) Micro-bending
c) Dispersion
d) Stimulated Emission

2. Microscopic meandering of the fiber core axis that is micro-bending is caused due to ___________
a) Environmental effects
b) Rough edges of the fiber
c) Large diameter of core
d) Polarization

3. How many forms of modal power distribution are considered?
a) One
b) Two
c) Three
d) Four

4. What does micro-bending losses depend on _____________
a) Core material
b) Refractive index
c) Diameter
d) Mode and wavelength

5. The fiber should be________________ to avoid deterioration of the optical transmission characteristics resulting from mode-coupling-induced micro-bending.
a) Free from irregular external pressure
b) Coupled with plastic
c) Large in diameter
d) Smooth and in a steady state

6. The diffusion of hydrogen into optical fiber affects the ______________
a) Transmission of optical light in the fiber
b) Spectral attenuation characteristics of the fiber
c) Core of the fiber
d) Cladding of the fiber

7. __________ can induce a considerable amount of attenuation in optical fibers.
a) Micro-bending
b) Dispersion
c) Diffusion of hydrogen
d) Radiation Exposure

8. The radiation-induced attenuation can be reduced through photo-bleaching.
a) True
b) False

9. The losses due to hydrogen absorption and reaction with fiber deposits can be temporary.
a) True
b) False

10. The losses caused due to hydrogen absorption mechanisms are in the range of ___________
a) 20 dB/km to 25 dB/km
b) 10 dB/km to 15 dB/km
c) 25 dB/km to 50 dB/km
d) 0 dB/km to 5 dB/km

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