Gooch & Housego PLC engages in the manufacture and sale of acousto-optics, electro-optics, fiber optics, and precision optics/systems in the United Kingdom, North America, Europe, the Asia Pacific, and internationally. The company operates through Aerospace & Defence, Life Sciences/Biophotonics, and Industrial segments. It offers acousto-optic products, such as acousto-optic modulators, deflectors, fiber-coupled modulators, frequency shifters, model lockers, multi-channel modulators, pulse pickers and cavity dumpers, Q-switches, tunable filters, and RF drivers; crystal optics, including crystals and nonlinear optics, lithium niobate wafers, and periodically-poled lithium niobite; electro-optics, such as pockels cells, lithium niobate Q-switches, and pockels cell drivers; and lens assemblies and sighting systems. The company also provides fiber optics, such as DFB lasers and modules, fiber coupled pump lasers, high speed detectors, benchtop laser controllers, fused fiber optic components, planar lightwave circuits, multimode products, micro-optics, fiber optic assemblies, OCT components and subsystems, optical fiber amplifiers, and fiber coupled modulators; and precision optics, including precision prisms, corner cubes, precision lenses, opto-mechanical assemblies, precision mirrors, synchrotron and research grade mirrors, plate and cube beamsplitters, optical windows and flats, waveplates, polished SROC, ring laser gyroscope components, infrared optics, and optical domes. In addition, it engages in the development and manufacture of medical and in vitro diagnostic devices. The company offers its products for use in semiconductor and microelectronic, metrology, telecommunications, and scientific research industries; and mission-critical applications, as well as medical research, diagnostic imaging, and laser surgery applications. Gooch & Housego plc was founded in 1948 and is headquartered in Ilminster, the United Kingdom.