Single-Mode VCSEL with Zn-Diffusion Apertures and Strong Immunity Against Optical Feedback for Improved Data Transmission

We demonstrate state-of-the-art performances of single-mode VCSELs, including wide-bandwidth (27GHz), high-power (6.7mW), low-RIN (-137dB/Hz), and invariant 56Gbps eye patterns under strong optical feedback (-6dB). It achieves error-free 46Gbit/sec transmission through 0.5km MMF without using equalizers.