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A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. They are commonly used in devices such as optical disk drives, laser printers, and barcode scanners and also in both fiber-optic and free-space optical communication, laser surgery, and in industry for cutting and welding materials. View the gallery of images, photos and illustrations below including research, instrumentation, holograms, radiotherapy and laser beams.

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