optical fibre communication

Discussion in 'Homework Help' started by bondpiki, Jul 23, 2014.

  1. bondpiki

    Thread Starter New Member

    Jul 23, 2014
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    An optical fibre communication system (NRZ coding) is operating at a data rate of 20 Mb/s and a bit-error-rate of 10^-9 (at most one error can occur for every 10^9 bits sent). The receiver is a PIN-photodiode operating at a wavelength of 850 nm. The source is a GaAlAs LED that couples 50 μW optical power into a fibre (fibre loss is 3.5 db/km) with a 50 μm core diameter. Connector loss at the source and detector is 1 dB each and the safety/system margin is 6 dB. Determine the maximum transmission path length (link distance).
    also how do I find the losses due to the that LED
     
    Last edited: Jul 23, 2014
  2. crutschow

    Expert

    Mar 14, 2008
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    3,226
    What losses are you referring to? It states there is a 1 dB loss a the interface to the cable.
     
  3. bondpiki

    Thread Starter New Member

    Jul 23, 2014
    3
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    the losses you are referring to are at the connectors
    I am referring to the ones due to the LED
     
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