25 Gbps direct modulation and 10 km data transmission with 1310 nm waveband wafer fused VCSELs

Direct modulation at >25 Gbps is achieved with 1310 nm wavelength wafer fused VCSELs by adjusting the strain in the quantum well active region and the cavity photon lifetime. 25 + Gbps large signal modulation with 10^-12 BER at 1310 nm across 10 km of standard single mode fiber is demonstrated.