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Free download in PDF Optical Fiber Communication Short Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
41
Which type of scattering occurs due to interaction of light in a medium with time dependent optical density variations thereby resulting into the change of energy (frequency) & path?
[A]
Stimulated Brilliouin Scattering (SBS)
[B]
Stimulated Raman Scattering (SRS)
[C]
Mie Scattering
[D]
Rayleigh Scattering
Answer: Stimulated Brilliouin Scattering (SBS)
42
In Rayleigh scattering of light in glass, at which type of temperature does the glass attain the state of thermal equilibrium and exhibits its relativity to annealing temperature?
[A]
Junction
[B]
Fictive
[C]
Breakdown
[D]
Decomposition
43
Assuming no ISI, the maximum possible bandwidth of a multimode graded index fiber with 5 MHz, shows the total pulse broadening of 0.1s for the distance of about 12km. What would be the value of bandwidth length product?
[A]
40 MHz
[B]
60 MHz
[C]
90 MHz
[D]
120 MHz
44
At which level of temperature does the oxidation process occur in MCVD?
[A]
Low
[B]
Moderate
[C]
High
[D]
Unpredictable
45
Consider the assertions given below. Which is the correct sequential order of process adopted in glass fiber preparation?
A. Drawing of fiber
B. Production of pure glass
C. Pulling of fiber
D. Conversion of pure glass into preform
[A]
B, D, A, C
[B]
A, B, C, D
[C]
C, A, D, B
[D]
D, B, A, C
46
Consider the statements given below. Which among them is not a drawback of double crucible method?
[A]
Utility in mass production of fibers
[B]
High attenuation
[C]
High OH content in drawn fiber
[D]
Addition of impurity while the fiber is drawn
Answer: Utility in mass production of fibers
47
On which of the following factor/s do/does the ‘Hydrogen Effect’ depend/s?
[A]
Type of fiber & Cable Design
[B]
Operating Wavelength
[C]
Installation Method
[D]
All of the above
48
With respect to single mode and graded index fibers, which parameter specifies the propagation of polarization modes with different phase velocities & the difference between their effective refractive indices?
[A]
Mode field diameter
[B]
Birefringence
[C]
Fiber beat length
[D]
Spot Size
49
Which kind of dispersion phenomenon gives rise to pulse spreading in single mode fibers?
[A]
Intramodal
[B]
Intermodal
[C]
Material
[D]
Group Velocity
50
If a fiber operates at 1400nm with the diameter of about 10 μm, n1 = 1.30, Δ = 0.80% , V = 3.5, then how many modes will it have?
[A]
6.125
[B]
9.655
[C]
12.95
[D]
16.55
51
In Lambertian output pattern of LED, the source is ______ bright from all directions.
[A]
Less
[B]
Equally
[C]
More
[D]
Unpredictably
52
The small section of fiber which is coupled to the optical source is known as _________
[A]
Flylead
[B]
Pigtail
[C]
Both a and b
[D]
None of the above
53
In a laser structure, the existence of standing waves is possible at frequencies for which the distance between the mirrors is an integral number of ________
[A]
λ / 2
[B]
λ / 4
[C]
λ / 6
[D]
λ / 8
54
Consider a crystal of ruby laser whose length is 6 cm and the refractive index is 1.8, emits the wavelength of about 0.55 μm. What will be the value of number of longitudinal modes?
[A]
3.9 x 105
[B]
4.9 x 105
[C]
5.6 x 105
[D]
7.7 x 105
55
In Stimulated Emission, which among the following parameters of generated photon is/are similar to the photon of incident wave?
[A]
Phase
[B]
Frequency
[C]
Polarization & direction of travel
[D]
All of the above
56
How many mating cycles are being rated by typically matched SC Connectors?
[A]
500
[B]
600
[C]
800
[D]
1000
57
Which among the following is regarded as a keyed bayonet connector along with its feasibility of easiest insertion and removal from the fiber optic cable?
[A]
FC Connectors
[B]
LC Connectors
[C]
MT-RJ Connectors
[D]
ST Connectors
58
Which component of fiber-optic connector has a provision of entry for the fiber along with the fixation to connector housing?
[A]
Ferrule
[B]
Cable
[C]
Connector Housing
[D]
Coupling Device
59
Which type of mechanical splicing exhibits the permanent bonding of prepared fiber ends with the rigid alignment of the tube?
[A]
Snug Tube Splicing
[B]
Loose Tube Splicing
[C]
Elastomeric Splicing
[D]
Precision Pin Splicing
Answer: Snug Tube Splicing
60
The macroscopic bending losses show an exponential increase due to ________ in radius of curvature.
[A]
Increase
[B]
Decrease
[C]
Stability
[D]
None of the above
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