STUPIDSID
1(a)
Explain spontaneous emission and stimulated emission.
5 M
1(b)
Explain bandwidth distance product.
5 M
1(c)
Discuss in brief single mode step index index fiber and multi-mode step index fiber.
5 M
1(d)
What are the advantages of optical fiber communication?
5 M
2(a)
Derive the expression for numerical Aperture of a step index fiber.What will happen to N.Aa.if cladding is removed?
10 M
2(b)
explain intermodal and intramodal dispersion in optical fibers.How does dispersion affect the transmission B.W of optical fibers.
10 M
3(a)
What are the reasons for signal attenuation in an optical fiber.
10 M
3(b)
Explain the significance of V-number.derive the expression for number of guided modes in graded index fiber.
10 M
4(a)
Give the structure of a surface emitting LED.Compare with an edge emitting LED.
10 M
4(b)
Explain any one fiber fabrication process with a neat diagram
10 M
5(a)
Explain with neat sketches fiber splicing techniques.Enlist the desirable requirements of a good Fiber connector.
10 M
5(b)
Describe quantum efficiency and responsivity of a photo defector.derive an expression for the responsivity of an intrinsic photo defector.
10 M
6(a)
Briefly discuss the possible souces of noise in optical fiber receiver.describe in detail.what is meant by quantum noise?
10 M
6(b)
Explain the techniques for measurement of attenuation,dispersion,refractive index and numerical aperture of a fiber.
10 M
Write short notes on any four:
7(a)
Link power Budget
5 M
7(b)
OTDR
5 M
7(c)
Coherent and non-coherent optical transmission.
5 M
7(d)
Multiplexing of optical signals
5 M
7(e)
PIN diode.
5 M
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