Low Thermal Crosstalk 808-nm VCSEL Arrays with Nonlinear Mesa Configuration

Abstract

In this paper, we demonstrated vertical-cavity surface-emitting laser (VCSEL) arrays with improved thermal stability by arranging the mesa distribution within the array in a nonlinear configuration. Based on our traversal design algorithm, VCSEL arrays with inhomogeneous mesa-distances were realized. The effects of this rearrangement of mesas on the VCSEL array's thermal stability were studied experimentally. Power-current characteristics and spectra of the 808 nm VCSEL arrays with different mesa distributions were obtained under different thermal stresses in which the optimized devices showed improved performance. The experimental results prove that our algorithm-based optimization is instructive for VCSEL array design.