- The edge-emitting LED have Laser like output hence can launch sufficient optical power for the data rates upto 560 Mb / sec over several kilometers. Also LEDs are cost effective and
- The LED to step index fiber coupling efficiency is given by,
… (4.6.1)
… (4.6.2)
where,
Pin is optical power launched into fiber. Ps is total source output power.
τx is directional coupling efficiency in parallel direction.
τy is directional coupling efficiency in perpendicular direction.