Coherent is a manufacturer of lasers, laser systems, laser components, and laser accessories. products and services include diode laser systems, diode laser components, ultraviolet lasers, infrared lasers, fiber based lasers, ion laser, laser measurements, optical components, optically pumped semiconductors, terahertz lasers, unable lasers, ultra fast oscillators, ultra fast amplifiers, laser calibration, laser repair, laser training programs, laser safety programs, pre-installation, guides, and laser technical support.