PTU M.Tech Paper 2012 Optical Communication Systems

PTU M.Tech Paper 2012 Optical Communication Systems Punjab Technical University Exam 2012 Optical Communication Systems Test September and March Question Paper Free Download Punjab Technical University Optical Communication Systems Question Papers 2012 PTU M.Tech Question Paper 2012 for all students Previous Year old Past Papers of PTU M.Tech Paper 2012 Optical Communication Systems Punjab Technical University September 2012 and March 2012 Exam M.Tech Sample Model Question Papers Free Download PDF

Optical Communication Systems

 List and explain the recent developments in the field of optical communication. How the nonlinear effects are restricting the data rates? Explain.
(a) What does the term transparent window means? Specify three peak wavelengths for the transparent windows in modem optical fibers.
(b) Draw & explain the GaA I As double heterostructure LED.
(a) How does responsivity depends on the wavelength of a photodiode? Explain with suitable mathematical treatment.
(b) List & explain optical & current confinement methods.
(a) What do you understand by SOA. List its application, advantages & disadvantages.
(b) Which pumping wavelength 980 nm or 1480 nm is preferred & Why?
What is soliton ? How it is used in WDM systems to manage the impairments. Explain with the help of suitable diagram and mathematically prove your statement.
(a) Consider a 5-channel FDM system having carriers at f,,f2f,+i, f3=f1+ 2, f4=f + 3 & f5 = f1 + 4, where E is the spacing between the carriers. On a frequency plot show that number & location of the triple beat and two tone third-order intermodulation effects.
(b) What is SCM? Explain and list its applications.

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