Polarization control and mode optimization of 850 nm multi-mode VCSELs using surface grating

Abstract To control the polarization of 850 nm multi-mode oxide-confined vertical-cavity surface-emitting lasers (VCSELs), monolithically integrated surface gratings are investigated. VCSELs with different grating parameters simulated by rigorous coupled-wave analysis (RCWA) method. Optical field intensity two orientations periods and duty cycles is obtained. The mode characteristics achieved FDTD fabricated characterized, a maximum orthogonal suppression ratio (OPSR) 20.7 dB observed. Meanwhile, VCSEL’s output improved integrating grating. Application technique to achieve dynamically polarization-stable which enable division multiplexed data transmission, throughput over given link can be doubled.