Zn-Diffusion Few-mode VCSELs for 50-Gb/s GI-SMF Transmission over 100 m at 850 nm Wavelength

A few-mode VCSEL has an oxide-confined aperture of 6 μm and a heavily Zn-diffusion aperture of 4 μm, which is demonstrated a -3-dB E-O bandwidth (26.5 GHz), and passed 50 Gb/s pre-emphasis NRZ-OOK transmission over 100 m GI-SMF links.