Optical network link budgets
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Optical Network Link Budgets . EE 548 Spring 2005. Reference Model. Link types. Link budget considerations. Laser power Laser line width Link losses Bit rate Detector sensitivity. Impairments . Connector and splice losses Fiber attenuation Polarization mode dispersion (PMD)

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Link budget considerations
Link budget considerations

  • Laser power

  • Laser line width

  • Link losses

  • Bit rate

  • Detector sensitivity


Impairments
Impairments

  • Connector and splice losses

  • Fiber attenuation

  • Polarization mode dispersion (PMD)

  • Chromatic dispersion

  • Filter losses

  • Splitter losses

  • Isolator losses





Long haul versus ultra long haul wdm systems

Long haul (LH)

Amplifier spacing: 80-120 km

Regenerator spacing: 400-600 km

Capacity: 80x10Gb/s

Cost: $$

Ultra long haul (ULH)

Amplifier spacing: 80-120 km

Regenerator spacing: 2500-4000 km

Capacity: 56x10Gb/s

Cost: $$$

Long haul versus ultra long haul WDM systems


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