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Optical Communication
Quiz 2
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Q.1
A multiplexing technique which does not involve the application of several message signals onto a single fiber is called as
time division multiplexing
frequency division multiplexing
code division multiplexing
space division multiplexing
Q.2
In the optical channel bandwidth is divided into non-overlapping frequency bands.
time division multiplexing
frequency division multiplexing
code division multiplexing
de-multiplexing
Q.3
How many encoding schemes are used in optical fiber communication system design requirements?
three
one
two
four
Q.4
A regenerative repeater is called as
repetitive repeater
regenerator
attenuator
gyrator
Q.5
The incorporates a line receiver in order to convert the optical signal into the electrical regime.
attenuator
transmitter
repeater
designator
Q.6
limits the maximum distance between the optical fiber transmitter and receiver.
attenuation
transmission
equipment
fiber length
Q.7
is the unique property of the glass fiber.
transmission
opaque property
ductile
malleable
Q.8
Mean splice insertion losses of 0.dB are obtained using multimode graded index fibers with the Springroove splice.
true
false
Q.9
is caused by surface tension effects between the two fiber ends during fusing.
pre-fusion
diffusion
self-alignment
splicing
Q.10
The rounding of the fiber ends with a low energy discharge before pressing the fibers together and fusing with a stronger arc is called as
pre-fusion
diffusion
crystallization
alignment
Q.11
Which of the following is not used as a flame heating source in fusion splicing?
microprocessor torches
ox hydric burners
electric arc
gas burner
Q.12
The heating of the two prepared fiber ends to their fusing point with the application of required axial pressure between the two optical fibers is called as
mechanical splicing
fusion splicing
melting
diffusion
Q.13
In score and break process, which of the following is not used as a cutting tool?
diamond
sapphire
tungsten carbide
copper
Q.14
What is the main requirement with the fibers that are intended for splicing?
smooth and oval end faces
smooth and square end faces
rough edge faces
large core diameter
Q.15
The insertion losses of the fiber splices are much less than the Fresnel reflection loss at a butted fiber joint.
true
false
Q.16
A permanent joint formed between two different optical fibers in the field is known as a
fiber splice
fiber connector
fiber attenuator
fiber dispersion
Q.17
2 dB along with a splice loss of 0.1 dB at the interconnection of each stage. Determine the excess loss.
1.9 db
1.4 db
0.9 db
1.1 db
Q.18
A coupler comprises a number of cascaded stages, each incorporating three or four-port FBT couplers to obtain a multiport output.
star
ladder
wdm
three-port
Q.19
How many manufacturing methods are used for producing multimode fiber star couplers?
two
one
three
five
Q.20
Couplers insertion loss is same as that of excess loss.
true
false
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