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Fiber Optics Fundamentals Test
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Fiber Optics Fundamentals Test
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25 Questions

1. For a profile parameter (α)=1 - the profile shape of refractive index for a graded index fiber will be _______.
2. Refer to the figure above. The critical angle at the core cladding interface is given by:
3. The rays which travel in a helical path through an optical fiber are called ______.
4. Total internal reflection takes place at angles ________.
5. For an ideal photo detector - the absorption coefficient must be ______.
6. Silicon reach through avalanche photodiodes has _______.
7. A multimode graded index fiber exhibits total pulse broadening of 0.2 µsec over a distance of 10Km. Estimate the maximum possible bandwidth assuming that there is no inter-symbol interference.
8. LED is more suitable for analog transmission because of its _______.
9. The fiber gyroscope is an ______.
10. Dispersion is the lowest in a________.
11. Homodyne detection is used for _______.
12. Dark spot defects (DSD's) occur in:
13. One polarization maintaining fiber operates at a wavelength of 1.5 µm and has a beat length of 0.6mm. Its modal birefringence is given by _______.
14. Intersymbol interference (ISI) in optical fibers occurs due to ______.
15. Dispersion in optical fibers causes distortion in _______.
16. IEEE 802.5 is a/an ________.
17. SOLITON is a/an ______.
18. Which of the following is a characteristic of an injection LASER?
19. The cutback technique is a/an _______.
20. LASER stands for:
21. Scattering losses happen due to:
22. Germanium avalanche photodiodes can be used for _______.
23. Rayleigh scattering is a ________.
24. What is the thermal noise current it in a resistor R expressed in its mean square value? where - K is Boltzmann's constant - T is absolute temperature and B is the bandwidth
25. For a step index fiber - relationship between numerical aperture (NA) and coupling efficiency (ηc) is ________.

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