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 14 of 18

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Q131.
An MQW cascaded laser is more advantageous because of ___________

a.

Mode hopping

b.

Auger recombination

c.

Control over layers of material

d.

Properties of material

Discuss
Answer: (c).Control over layers of material
Q132.
The absence of _______________ in LEDs limits the internal quantum efficiency.

a.

Proper semiconductor

b.

Adequate power supply

c.

Optical amplification through stimulated emission

d.

Optical amplification through spontaneous emission

Discuss
Answer: (c).Optical amplification through stimulated emission
Q133.
The excess density of electrons Ξ”n and holes Ξ”pin an LED is ____________

a.

Equal

b.

Ξ”p more than Ξ”n

c.

Ξ”n more than Ξ”p

d.

Does not affects the LED

Discuss
Answer: (a).Equal
Q134.
The hole concentration in extrinsic materials is _________ electron concentration.

a.

much greater than

b.

lesser than

c.

equal to

d.

negligible difference with

Discuss
Answer: (a).much greater than
Q135.
The carrier recombination lifetime becomes majority or injected carrier lifetime.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q136.
In a junction diode, an equilibrium condition occurs when ____________

a.

Ξ”n greater than Ξ”p

b.

Ξ”n smaller than Ξ”p

c.

Constant current flow

d.

Optical amplification through stimulated emission

Discuss
Answer: (c).Constant current flow
Q137.
Determine the total carrier recombination lifetime of a double heterojunction LED where the radioactive and nonradioactive recombination lifetime of minority carriers in active region are 70 ns and 100 ns respectively.

a.

41.17 ns

b.

35 ns

c.

40 ns

d.

37.5 ns

Discuss
Answer: (a).41.17 ns
Q138.
Determine the internal quantum efficiency generated within a device when it has a radiative recombination lifetime of 80 ns and total carrier recombination lifetime of 40 ns.

a.

20 %

b.

80 %

c.

30 %

d.

40 %

Discuss
Answer: (b).80 %
Q139.
Compute power internally generated within a double-heterojunction LED if it has internal quantum efficiency of 64.5 % and drive current of 40 mA with a peak emission wavelength of 0.82 ΞΌm.

a.

0.09

b.

0.039

c.

0.04

d.

0.06

Discuss
Answer: (b).0.039
Q140.
The Lambertian intensity distribution __________ the external power efficiency by some percent.

a.

Reduces

b.

Does not affects

c.

Increases

d.

Have a negligible effect

Discuss
Answer: (a).Reduces
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