Optical Communications

1.) a.) Draw the Block Diagram of Optical Transision Link & explain the function of each element

    b.) Compare the Single & Multi Mode Fibers

2.) a.) Write a short notes   on Plastic Optical Fibers

    b.) Explain the Following

       1) Effective Refractive Index

       2) Mode Field Diameter

       3) Cutoff Wave length

3.) a.) Explain Wave Guide Dispersion

    b.) Pulse Broadning ... Explain it With a neat Sketch

4.) Relevent Expressions, Explain The Internal Quantum Efficiency & External Quantum Efficiency


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Radar Systems

1.) a.) Pulse Radar Block Diagram & explanation

    b.) Applications of radar in Civil & Mechanical

2.) a.) Radar Range Equation with Minimum Detectable Signal Smin With respect to (S/N)

    b.) Difference Between CW & Pulse Radar

3.) a.) Block Diagram & Explanation of FMCW Radar

    b.) Problems

4.) a.) Reciever Bandwidth Recovermnt CW Radar

    b.) Target Crosssection

    c.) System Losses

    d.) Problem  Formula :- C/(2fr)