High-speed characteristics at high input optical power of GaInAsP electroabsorption modulators

High-speed characteristics at high input optical power levels of GaInAsP double heterostructure electroabsorption modulators are investigated. It is shown that the bandwidth degradation due to high input optical power is strongly dependent on the absorption coefficient. A design to maintain highspeed characteristics under milliwatt range output power operation, and experimental results including a 100km single-mode fibre pulse transmission experiment, are demonstrated.