Accurate and reproducible molecular beam epitaxial (MBE) growths of vertical cavity surface-emitting lasers (VCSEL's) and various vertical-cavity structures are achieved using an extremely simple, cost-effective and compact diode laser reflectometry pre-growth calibration system, Average growth accuracy of 0.25% with a 0.40% standard deviation is obtained over a period of 6 months for a variety of growth structures, Low threshold continuous wave room temperature operation is achieved from all the VCSEL wafers.