II-VI Inc manufactures engineered materials, optoelectronic components and products used in industrial, optical communications, military, semiconductor, consumer, and life science applications. The firm operates in three segments: laser solutions, photonics, and performance products. The photonics segment contributes the largest proportion of revenue and manufactures customized optics and optical components. The laser solutions segment manufactures high-power lasers, laser diodes, laser material processing tools, and infrared optics. The performance products segment manufactures optical systems, thermoelectric modules, and products for semiconductor, defense, and industrial companies. II-VI generates the majority of its revenue outside the United States.