Download Previous Year Diploma Paper of Optical Fiber Communication OFC 6th Sem Diploma Dec 2018 Paper
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
The number of bits transmitted per second over a channel is called         .
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The optical communication frequency is ______Â
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The principle of light propagation in optical fibre is based on _____
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LASER stands forÂ
Dark current is defined as
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LASER exhibits
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In a graded index fiber the refractive index _____Â
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The optical fiber structure consists of basically three parts
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Single mode fibers support only _____ mode of
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The unit of Dispersion is_______Â
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VCSEL stands for
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Johnson noise is due to _______
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A photodiode is used in _ ___
DWDM stands for_____Â
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The heart of an optical receiver is the _________
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Critical Angle
Snell’s Law
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Step Index and graded index FibresÂ
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Characteristics of light used in Optical CommunicationÂ
Block diagram of an Optical Receiver
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Different types of functional Amplifiers.
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What is Splicing
Two Techniques of SplicingÂ
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Applications of Optical CommunicationÂ
Few applications of Optical CommunicationÂ
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Advantages and disadvantages of Optical Fiber Communication.
 Types of LED and its structures.
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Optical Power BudgetingÂ
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Need of an Optical Amplifier
Discuss SOA Amplifier
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Different types of losses in Optical Fibre Communication.
short notes on (any two)
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- Effect of dispersion on data Rate
2.WDM
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 3. Historical perspective of Optical Communication