Transmission Characteristics of Optical Fiber – 1 – 1

1. LEDs are used as light sources in :

(a) single mode fibers only
(b) multimode fibers only
(c) both single mode and multimode fibers
(d) 
none of the above

ANSWER
Answer : (b)

EXPLANATION
No answer description available for this question. Let us discuss.

2. The loss in signal power as light travels down a fiber is called :

(a) dispersion
(b) scattering
(c) absorption
(d) 
attenuation

ANSWER
Answer : (d)

EXPLANATION
No answer description available for this question. Let us discuss.

3. Dispersion is used to describe the :

(a) splitting of white light into its component colors
(b) propagation of light in straight lines
(c) bending of a beam of light when it goes from one medium to another
(d) 
bending of a beam light when it strikes a mirror

ANSWER
Answer : (a)

EXPLANATION
No answer description available for this question. Let us discuss.

4. Which of the following is used as an optical transmitter on the Fiber Optical Communications ?

(a) APD
(b) LSA diode
(c) PIN diode
(d)
 LED

ANSWER
Answer : (d)

EXPLANATION
No answer description available for this question. Let us discuss.

5. What type of fiber has the highest modal dispersion ?

(a) step-index multimode
(b) graded index multimode
(c) step-index single mode
(d) 
graded index mode

ANSWER
Answer : (a)

EXPLANATION
No answer description available for this question. Let us discuss.

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