Here's the company description from GOOGLE FINANCE
EMCORE Corporation (EMCORE) offers a portfolio of compound semiconductor- based components and subsystems for the broadband, fiber optic, satellite, solar and wireless communications markets. The Company's solutions include optical components and subsystems for fiber-to-the-premise, cable television and high-speed data and telecommunications networks; solar cells, solar panels and fiber optic ground station links for global satellite communications, and radio frequency transistor materials. Through its joint venture participation in GELcore, LLC, EMCORE develops and commercializes high-brightness light emitting diode technology for use in the general and specialty illumination markets. It operates in three segments: Fiber Optics, Photovoltaics, and Electronic Materials and Devices (EMD). On August 21, 2006, the Company's EMD segment was acquired by IQE plc. In August 2006, EMCORE sold its 49% membership interest in GELcore, LLC. On April 13, 2007, it acquired Opticomm Corporation
