VCSEL with Bi-Layer Oxidized Aperture Enables 140-Gbit/s OFDM Transmission over 100-m-Long OM5 MMF

A few-mode 850-nm VCSEL chip directly modulated by 16-QAM OFDM data at 140 Gbit/s is demonstrated to enable error-free transmission over 100-m-long OM5 MMF with 3.1-dB power penalty compared to the back-to-back case.