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Optical Network Link Budgets

This document provides a comprehensive overview of optical network link budgets, focusing on the essential considerations that affect performance, such as laser power, line width, link losses, and bit rates. It explores different link types, including short haul and long haul networks, alongside a case study featuring long and ultra-long haul systems with varying amplifier and regenerator spacing. Key factors include costs and capacities, highlighting the differences between long haul and ultra-long haul WDM systems. Perfect for engineers and technicians in the optical communication field.

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Optical Network Link Budgets

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  1. Optical Network Link Budgets EE 548 Spring 2005

  2. Reference Model

  3. Link types

  4. Link budget considerations • Laser power • Laser line width • Link losses • Bit rate • Detector sensitivity

  5. Impairments • Connector and splice losses • Fiber attenuation • Polarization mode dispersion (PMD) • Chromatic dispersion • Filter losses • Splitter losses • Isolator losses

  6. Short haul link

  7. 100 km, 8 wavelength WDM channels, 2.5 Gb/s

  8. Long haul network case study

  9. 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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