Optical Fiber Communication OFC 6th Sem Diploma Dec 2018 Paper

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Optical Fiber Communication OFC 6th Sem Diploma Dec 2018 Paper

SECTION-A

Q1. Do as directed. 15×1=15

a. The optical power budget is usually expressed in .
b. The unit of dispersion is .
c. The refractive index of multimode fiber changes .
d. The pre-amplifier are used to provide small gain (T/F).
e. SLED Stands for .
f. Snell’s law states that .
g. __________ tells us about the information carrying capacity of the channel.
h. Semiconductor LD’s emits coherent light (T/F).
i. MFD stands for .
j. EDFA stands for

SECTION-B

Q2. Attempt any five questions. 5×6=30

i. Explain avalanche photodiode with suitable diagram.
ii. Define Total Internal Reflection (TIR)? How it is useful in optical fiber communication?
iii. Write advantages of optical fiber communication.
iv. Explain the basic structure of an optical fiber?
v. Explain the principle of light penetration in optical fiber cable.
vi. What are the difference between single mode and multi mode fiber?
vii. Write short note on :
a) Raman Scattering b) Absorption loss
viii. What is dispersion? What are the different types of dispersion?
.

SECTION-C

Q3. Attempt any three questions. 3×10=30

a. What do you mean by optical light source? Explain different types of optical sources.
b. Draw and explain block diagram of optical fiber communication link.
c. Define optical amplifiers. What are the different types of optical amplifiers? Explain briefly.
d. Write Short notes on the following. (any two)
i. Stimulated emission
ii. Optical detectors
iii. SOA applications

Optical Fiber Communication OFC 6th Sem Diploma May 2015 Paper

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Section a FILL IN THE BLANKS Optical Fiber Communication OFC 6th Sem Diploma May 2015 Paper

The number of bits transmitted per second over a channel is called _______.

The number of bits transmitted per second over a channel is called .

The optical communication frequency is ________

The optical communication frequency is ______

The principle of light propagation in optical fibre is based on _______

The principle of light propagation in optical fibre is based on _____

LASER stands for ___________.

LASER stands for

Dark current is defined as ___________

Dark current is defined as

LASER exhibits ___________

LASER exhibits

In a graded index fiber the refractive index _____

The optical fiber structure consists of basically three parts __________

The optical fiber structure consists of basically three parts

The process of extracting mineral from the earth is known as ______.

Single mode fibers support only _____ mode of

The unit of Dispersion is _________

The unit of Dispersion is_______

VCSEL stands for _________.

VCSEL stands for

Johnson noise is due to _________.

Johnson noise is due to _______

A photodiode is used in _________

A photodiode is used in _ ___

DWDM stands for_____

The heart of an optical receiver is the _________

Optical Fiber Communication OFC 6th Sem Diploma May 2015 Solved Paper Click Here

Section B :Optical Fiber Communication OFC 6th Sem Diploma May 2015 Paper

Define: Critical Angle, Snell’s Law ?

Critical Angle

Snell’s Law

What are Step Index and graded index Fibres ?

Step Index and graded index Fibres

Discuss the characteristics of light used in Optical Communication ?

Characteristics of light used in Optical Communication

Draw the block diagram of an Optical Receiver

Block diagram of an Optical Receiver

Describe the different types of functional Amplifiers.

Different types of functional Amplifiers.

What is Splicing? Explain any two techniques of Splicing ?

What is Splicing

Two Techniques of Splicing

List a few applications of Optical Communication ?

Applications of Optical Communication

List a few applications of Optical Communication ?

Few applications of Optical Communication

Optical Fiber Communication OFC 6th Sem Diploma May 2015 Paper Click Here

Optical Fiber Communication OFC 6th Sem Diploma May 2015 Paper

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