Profile: Gooch & Housego is a manufacturer of precision optical components and sub-systems, light measurement instrumentation & services. We are an ISO 9001 and ISO 14000 certified company. We provide acousto-optics, electro-optics, precision optics, fibre optics, coatings and RF drivers. Our acousto-optic Q-switches are special modulators designed for use inside laser cavities and it is used in infra-red, lamp-pumped & diode-pumped solid state lasers & its key parameters are wavelength, optical power density, polarization, beam diameter, loss modulation, size constraints & mechanical configuration & cooling possibilities. Our RF drivers include a wide range of oscillator designs such as crystal controlled oscillators, voltage controlled oscillators, digitally controlled frequency synthesizers and phase locked loop controlled oscillators. We specialize in the manufacture of wide band reflector coatings and these films typically are designed for low scatter & absorbtion & are ideal for use in devices such as spectrophotometers, laser scatterometers, ring down cavity loss meters, laser transmissometers & ellipsometers.