Our Companies


EM4 Inc. is a worldwide provider of state-of-the-art, ruggedized optoelectronic components and packages for the Defense, Aerospace, Life Science, CATV, Telecommunication and Industrial markets. EM4’s core capabilities span from design and development to full-scale production and reliability testing of integrated active devices including directly modulated lasers, photodiode receivers, transceivers, pump lasers and amplifiers. EM4 was acquired by Gooch and Housego.