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ELG5381 Photonics Networks

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  • Course Code: ELG5381
  • University: University Of Ottawa

    MyAssignmentHelp.com is not sponsored or endorsed by this college or university

  • Country: Canada

Questions:

1.Calculate the acceptance angle of a single-mode fibre at the wavelength 1.55 µm with the parameter 2, the core radius 4 µm, the fractional index contrast 0.003, and the refractive index of the cladding 1.45.
 
2.In earlier-generation optical communication networks, it was common to use LED as light sources. Give explanation why LEDs are not the best choice for fibre optics networks. What improvements did the laser diodes introduce to the network performance?
 
3.Calculate the responsivity of a p-i-n photodiode at 1.3 and 1.55 µm if the quantum efficiency is 80%. Why is the photodiode more responsive at 1.55 µm?
 
4.How can one encode 4 bits per symbol? Sketch the schematic of a transmitter for such multilevel modulation and explain what is the role of each component in the encoding process.
 
5.With many of the components, an individual port may function as an input port or an output port depending upon the direction of light propagation (e.g., consider passive combiners and passive splitters). If such a device allows multiple input ports to direct the same wavelength to an output port, then what feature does it also support?
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