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 2 of 18

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Q11.
Doppler broadening is a homogeneous broadening mechanism.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q12.
An injection laser has active cavity losses of 25 cm⁻¹ and the reflectivity of each laser facet is 30%. Determine the laser gain coefficient for the cavity it has a length of 500 μm.

a.

46 cm⁻¹

b.

51 cm⁻¹

c.

50 cm⁻¹

d.

49.07 cm⁻¹

Discuss
Answer: (d).49.07 cm⁻¹
Q13.
Longitudinal modes contribute only a single spot of light to the laser output.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q14.
Considering the values given below, calculate the mode separation in terms of free space wavelength for a laser. (Frequency separation = 2 GHz, Wavelength = 0.5 μm)

a.

1.4×10⁻¹¹

b.

1.6×10⁻¹²

c.

1×10⁻¹²

d.

6×10⁻¹¹

Discuss
Answer: (b).1.6×10⁻¹²
Q15.
A perfect semiconductor crystal containing no impurities or lattice defects is called as __________

a.

Intrinsic semiconductor

b.

Extrinsic semiconductor

c.

Excitation

d.

Valence electron

Discuss
Answer: (a).Intrinsic semiconductor
Q16.
The energy-level occupation for a semiconductor in thermal equilibrium is described by the __________

a.

Boltzmann distribution function

b.

Probability distribution function

c.

Fermi-Dirac distribution function

d.

Cumulative distribution function

Discuss
Answer: (c).Fermi-Dirac distribution function
Q17.
What is done to create an extrinsic semiconductor?

a.

Refractive index is decreased

b.

Doping the material with impurities

c.

Increase the band-gap of the material

d.

Stimulated emission

Discuss
Answer: (b).Doping the material with impurities
Q18.
The majority of the carriers in a p-type semiconductor are __________

a.

Holes

b.

Electrons

c.

Photons

d.

Neutrons

Discuss
Answer: (a).Holes
Q19.
_________________ is used when the optical emission results from the application of electric field.

a.

Radiation

b.

Efficiency

c.

Electro-luminescence

d.

Magnetron oscillator

Discuss
Answer: (c).Electro-luminescence
Q20.
In the given equation, what does p stands for?

p = 2πhk

a.

Permittivity

b.

Probability

c.

Holes

d.

Crystal momentum

Discuss
Answer: (d).Crystal momentum
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