Optical Sources MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Optical Sources, 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 Optical Sources 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 Optical Sources mcq questions that explore various aspects of Optical Sources problems. Each MCQ is crafted to challenge your understanding of Optical Sources 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 Optical Sources MCQs are your pathway to success in mastering this essential Optical Communication topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Optical Sources. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Optical Sources knowledge to the test? Let's get started with our carefully curated MCQs!

Optical Sources MCQs | Page 15 of 18

Discover more Topics under Optical Communication

Q141.
A planar LED fabricated from GaAs has a refractive index of 2.5. Compute the optical power emitted when transmission factor is 0.68.

a.

3.4 %

b.

1.23 %

c.

2.72 %

d.

3.62 %

Discuss
Answer: (c).2.72 %
Q142.
A planar LED is fabricated from GaAs is having a optical power emitted is 0.018% of optical power generated internally which is 0.018% of optical power generated internally which is 0.6 P. Determine external power efficiency.

a.

0.18%

b.

0.32%

c.

0.65%

d.

0.9%

Discuss
Answer: (d).0.9%
Q143.
For a GaAs LED, the coupling efficiency is 0.05. Compute the optical loss in decibels.

a.

12.3 dB

b.

14 dB

c.

13.01 dB

d.

14.6 dB

Discuss
Answer: (c).13.01 dB
Q144.
In a GaAs LED, compute the loss relative to internally generated optical power in the fiber when there is small air gap between LED and fiber core. (Fiber coupled = 5.5 * 10⁻⁴ Pint)

a.

34 dB

b.

32.59 dB

c.

42 dB

d.

33.1 dB

Discuss
Answer: (b).32.59 dB
Q145.
Determine coupling efficiency into the fiber when GaAs LED is in close proximity to fiber core having numerical aperture of 0.3.

a.

0.9

b.

0.3

c.

0.6

d.

0.12

Discuss
Answer: (a).0.9
Q146.
If a particular optical power is coupled from an incoherent LED into a low-NA fiber, the device must exhibit very high radiance.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q147.
The amount of radiance in planer type of LED structures is ____________

a.

Low

b.

High

c.

Zero

d.

Negligible

Discuss
Answer: (a).Low
Q148.
In optical fiber communication _____________ major types of LED structures are used.

a.

2

b.

4

c.

6

d.

3

Discuss
Answer: (c).6
Q149.
As compared to planar LED structure, Dome LEDs have ______________ External power efficiency ___________ effective emission area and _____________ radiance.

a.

Greater, lesser, reduced

b.

Higher, greater, reduced

c.

Higher, lesser, increased

d.

Greater, greater, increased

Discuss
Answer: (b).Higher, greater, reduced
Q150.
The techniques by Burros and Dawson in reference to homo structure device is to use an etched well in GaAs structure.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Page 15 of 18