Our high speed 850nm multimode VCSEL chips are designed to meet stringent specifications for high speed data communications. The high performance, high reliability device is engineered with low electrical parasitics for data rates up to 10Gb/s. The VCSEL operates in multiple transverse and single longitudinal modes and emits a circular symmetric beam with low divergence that can be efficiently coupled into 50/125 and 62.5/125µm multimode fibers. The chip design allows flexible linear array combinations in common cathode configuration with a pitch of 250 microns between individual channels.