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

7. Short haul link

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

9. Long haul network case study

12. 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: $$ Ultra long haul (ULH) Amplifier spacing: 80-120 km Regenerator spacing: 2500-4000 km Capacity: 56x10Gb/s Cost: $$$