Transmission Characteristics of Optical Fibers MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Transmission Characteristics of Optical Fibers, a fundamental topic in the field of Optical Communication. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Transmission Characteristics of Optical Fibers MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Transmission Characteristics of Optical Fibers mcq questions that explore various aspects of Transmission Characteristics of Optical Fibers problems. Each MCQ is crafted to challenge your understanding of Transmission Characteristics of Optical Fibers principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Optical Communication tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Transmission Characteristics of Optical Fibers MCQs are your pathway to success in mastering this essential Optical Communication topic.

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Transmission Characteristics of Optical Fibers MCQs | Page 4 of 9

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Q31.
What is pulse dispersion per unit length if for a graded index fiber, 0.1 ฮผs pulse broadening is seen over a distance of 13 km?

a.

6.12 ns/km

b.

7.69 ns/km

c.

10.29 ns/km

d.

8.23 ns/km

Discuss
Answer: (b).7.69 ns/km
Q32.
Chromatic dispersion is also called as intermodal dispersion.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q33.
The optical source used in a fiber is an injection laser with a relative spectral width ฯƒฮป/ฮป of 0.0011 at a wavelength of 0.70 ฮผm. Estimate the RMS spectral width.

a.

1.2 nm

b.

1.3 nm

c.

0.77 nm

d.

0.98 nm

Discuss
Answer: (c).0.77 nm
Q34.
In waveguide dispersion, refractive index is independent of ______________

a.

Bit rate

b.

Index difference

c.

Velocity of medium

d.

Wavelength

Discuss
Answer: (d).Wavelength
Q35.
Intermodal dispersion occurring in a large amount in multimode step index fiber results in ____________

a.

Propagation of the fiber

b.

Propagating through the fiber

c.

Pulse broadening at output

d.

Attenuation of waves

Discuss
Answer: (c).Pulse broadening at output
Q36.
After Total Internal Reflection the Meridional ray __________

a.

Makes an angle equal to acceptance angle with the axial ray

b.

Makes an angle equal to critical angle with the axial ray

c.

Travels parallel equal to critical angle with the axial ray

d.

Makes an angle equal to critical angle with the axial ray

Discuss
Answer: (d).Makes an angle equal to critical angle with the axial ray
Q37.
Consider a single mode fiber having core refractive index n1= 1.5. The fiber length is 12 m. Find the time taken by the axial ray to travel along the fiber.

a.

1.00 ฮผsec

b.

0.06 ฮผsec

c.

0.90 ฮผsec

d.

0.30 ฮผsec

Discuss
Answer: (b).0.06 ฮผsec
Q38.
A 4 km optical link consists of multimode step index fiber with core refractive index of 1.3 and a relative refractive index difference of 1%. Find the delay difference between the slowest and fastest modes at the fiber output.

a.

0.173 ฮผsec

b.

0.152 ฮผsec

c.

0.96 ฮผsec

d.

0.121 ฮผsec

Discuss
Answer: (a).0.173 ฮผsec
Q39.
A multimode step-index fiber has a core refractive index of 1.5 and relative refractive index difference of 1%. The length of the optical link is 6 km. Estimate the RMS pulse broadening due to intermodal dispersion on the link.

a.

92.6 ns

b.

86.7 ns

c.

69.3 ns

d.

68.32 ns

Discuss
Answer: (b).86.7 ns
Q40.
The differential attenuation of modes reduces intermodal pulse broadening on a multimode optical link.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
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