Briefly describe the block diagram of Optical Communication System.
[3 marks]Explain in brief the transmission windows of OC.
[4 marks]Describe double crucible Method for fiber fabrication.
[7 marks]Define the following w.r.to propogation modes in OFC:
[3 marks]Transverse Propagation Constant(ii) V Number(iii)Group Velocity
[ marks]Compare Single Mode and Multi Mode fibers.
[4 marks]Describe fiber Bending Losses in brief.
[7 marks]Compare LED and LASER as fiber optic source.
[3 marks]Determine the normalized frequency at 850 nm for a step index fiber has a core radius of 25μm,core refractive index of 1.48 and cladding refractive index of 1.46. How modes propagate in this fiber at 1320 nm and 1550nm.
[4 marks]Describe different lensing schemes used in optical cable
[7 marks]Compare SLED (Surface emitting )and ELED(Edge emitting) as fiber source.
[3 marks]Amultimode graded index fiber exhibits total pulse broadening 0.1 μsec over a distance of 12 km. Calculate(i)Optimum bandwidth on the link assuming no inter symbol interference.(ii) pulse broadening per unit length.
[4 marks]Explain various losses taking place at fiber to fiber joints.
[7 marks]Explain in brief dark current noise in photo detector.
[3 marks]Describe the structure of P-I-Nphoto detector in brief.
[4 marks]Explain different techniques of splicing in brief.
[7 marks]Briefly describe temperature effect on Gain of APD.
[3 marks]Explain APD in brief.
[4 marks]Derive the equation for the power launched from LED source in to a S.I. Fiber.
[7 marks]How will you measure intermodal dispersion in frequency domain?
[3 marks]Mention the requirement of good optical switch.
[4 marks]Discuss optical power loss model for a point to point link.1
[7 marks]How will you measure chromatic dispersion?
[3 marks]Compare SOA and EDFPA.
[4 marks]Briefly explain wavelength converter in optical components .
[7 marks]