Explore topic-wise MCQs in Optical Communication.

This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Optical Communication knowledge and support exam preparation. Choose a topic below to get started.

1.

In waveguide dispersion, refractive index is independent of ______________

A. Bit rate
B. Index difference
C. Velocity of medium
D. Wavelength
Answer» E.
Discussion
2.

The optical source used in a fiber is an injection laser with a relative spectral width σλ/λ of 0.0011 at a wavelength of 0.70μm. Estimate the RMS spectral width.

A. 1.2 nm
B. 1.3 nm
C. 0.77 nm
D. 0.98 nm
Answer» D. 0.98 nm
Discussion
3.

What is pulse dispersion per unit length if for a graded index fiber, 0.1μs pulse broadening is seen over a distance of 13 km?

A. 6.12ns/km
B. 7.69ns/km
C. 10.29ns/km
D. 8.23ns/km
Answer» C. 10.29ns/km
Discussion
4.

A multimode graded index fiber exhibits a total pulse broadening of 0.15μsover a distance of 16 km. Estimate the maximum possible bandwidth, assuming no intersymbol interference.

A. 4.6 MHz
B. 3.9 MHz
C. 3.3 MHz
D. 4.2 MHz
Answer» D. 4.2 MHz
Discussion
5.

The maximum bit rate that may be obtained on an optical fiber link is 1/3Γ.

A. True
B. False
Answer» C.
Discussion
6.

For no overlapping of light pulses down on an optical fiber link, the digital bit rate BT must be ___________

A. Less than the reciprocal of broadened pulse duration
B. More than the reciprocal of broadened pulse duration
C. Same as that of than the reciprocal of broadened pulse duration
D. Negligible
Answer» B. More than the reciprocal of broadened pulse duration
Discussion
7.

CHROMATIC_DISPERSION_IS_ALSO_CALLED_AS_INTERMODAL_DISPERSION._STATE_TRUE_OR_FALSE?$

A. True
B. False
Answer» C.
Discussion
8.

In waveguide dispersion, refractive index is independent of$

A. Bit rate
B. Index difference
C. Velocity of medium
D. Wavelength
Answer» E.
Discussion
9.

The_optical_source_used_in_a_fiber_is_an_injection_laser_with_a_relative_spectral_width_σλ/λ_of_0.0011_at_a_wavelength_of_0.70μm._Estimate_the_RMS_spectral_width.$#

A. 1.2 nm
B. 1.3 nm
C. 0.77 nm
D. 0.98 nm
Answer» D. 0.98 nm
Discussion
10.

Chromatic dispersion is also called as intermodal dispersion. State whether the given statement true or false?

A. True
B. False
Answer» C.
Discussion
11.

What is pulse dispersion per unit length if for a graded index fiber, 0.1μs pulse broadening is seen over a distance of 13 km?$

A. 6.12ns/km
B. 7.69ns/km
C. 10.29ns/km
D. 8.23ns/km
Answer» C. 10.29ns/km
Discussion
12.

A multimode graded index fiber exhibits a total pulse broadening of 0.15μsover a distance of 16 km. Estimate the maximum possible bandwidth, assuming no intersymbol interference.$

A. 4.6 MHz
B. 3.9 MHz
C. 3.3 MHz
D. 4.2 MHz
Answer» D. 4.2 MHz
Discussion
13.

3dB optical bandwidth is always ___________ the 3dB electrical bandwidth.

A. Smaller than
B. Larger than
C. Negligible than
D. Equal to
Answer» C. Negligible than
Discussion
14.

The maximum bit rate that may be obtained on an optical fiber link is 1/3Γ. State whether the given statement is true or false.$

A. True
B. False
Answer» C.
Discussion
15.

For no overlapping of light pulses down on an optical fiber link, the digital bit rate BT must be:

A. Less than the reciprocal of broadened pulse duration
B. More than the reciprocal of broadened pulse duration
C. Same as that of than the reciprocal of broadened pulse duration
D. Negligible
Answer» B. More than the reciprocal of broadened pulse duration
Discussion
16.

What does ISI stands for in optical fiber communication?

A. Invisible size interference
B. Infrared size interference
C. Inter-symbol interference
D. Inter-shape interference
Answer» D. Inter-shape interference
Discussion
17.

What is dispersion in optical fiber communication?

A. Compression of light pulses
B. Broadening of transmitted light pulses along the channel
C. Overlapping of light pulses on compression
D. Absorption of light pulses
Answer» C. Overlapping of light pulses on compression
Discussion