Mention the advantages of optical fiber communications.
[3 marks]Explain elastic tube techniques for fiber splicing.
[4 marks]How acceptance angle is related to the fiber numerical aperture? Explain with the use of ray theory.
[7 marks]“ The optical power launched into a fiber does not depend on the wavelength of the source but only on it’s brightness” Justify
[3 marks]Briefly Describe the block diagram of Optical Communication Systems. 0
[4 marks]Write short notes on Synchronous optical fiber networks(SONET)
[7 marks]Derive the equation for the power launched from LED Source in to a S.I. fiber.
[7 marks]Define the following terms related to photo detector. 0
[3 marks]Responsivity (ii) Quantum efficiency (iii) Cut off Wavelength.
[ marks]What is meant by attenuation of signal in fiber cable? How this loss can be measured?
[4 marks]Discuss Optical Time Domian Reflectomarary in detail.
[7 marks]Explain stimulated emission mechanism.
[3 marks]Explain block diagram of optical communication system with neat sketch and mention functions of each block.
[4 marks]Discuss optical power loss model for a point to point link.
[7 marks]Explain equilibrium numerical aperture.
[3 marks]List the different types of lensing schemes used in optical system and Explain them indetail.
[4 marks]Amultimode step index fiber with a core diameter of 80 µm and a relative index difference of 1.5% is operating at a wavelength of 0.85 µm. If the core refractive index is 1.48,calculate:
[7 marks]Normalized frequency of fiber (ii) Total number of guided modes.
[ marks]Explain three operating window of fiber optics communication.
[3 marks]Explain the basic principles of WDM and DWDM with respect to optical fiber system.
[4 marks]Discuss the various dispersion mechanisms that contribute to pulse broadening during the fiber transmission.1
[7 marks]Explain OVPO method of fiber fabrication.
[3 marks]Describe the architecture and amplification mechanism of Erbium Doped Fiber Amplifier.
[4 marks]Briefly explain the principal of optical detection. Discuss the major advantages of APD over P-i-n photodiode.
[7 marks]Give the comparison of S.I. and G.I. fibers. 0
[3 marks]Discuss the intermodal dispersion mechanisms that contribute to pulse broadening during the fiber transmission.
[4 marks]With reference to LED, explain how to achieve.
[7 marks]a high radiance and high quantum effect
[ marks]carrier and optical confinement.
