High-Speed 1030 nm Anti-Waveguide VCSELs With 25 GHz Modulation Bandwidth

We present the design, fabrication, and performance of high-speed oxide-confined 1030 nm vertical-cavity surface-emitting lasers (VCSELs) with a short anti–waveguiding optical cavity. By using half-wavelength cavity to enhance limit field, anti-waveguide design increases oscillator strength, thus promoting modulation. carefully optimized multiple quantum wells doping profile in order achieve operation. The developed VCSELs exhibit modulation bandwidth exceeding 25.1 GHz at 25 °C, supporting back-to-back data rates up 40 Gb/s under binary non-return-to-zero (NRZ)