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A laser, or Light Amplification by Stimulated Emission of Radiation, device is a common tool in many industries. The electrical energy produced for the laser is converted into light energy or photon energy and is tunable for a vast variety of procedures and tasks. Though there are many types of lasers diode lasers are commonly preferred and are the most abundant laser. Diode lasers can consist of double heterostructure lasers, quantum well lasers, quantum cascade lasers, VCSELS and more. This type of laser has versatile capabilities that rival the quality of any other laser produced today.

Diode lasers use an active medium semiconductor. This is formed from a p-n junction that is powered by an electric current. This essentially is converting electrical energy into light energy. When the laser lights are visible they are seen as red, blue or green. Infrared diode lasers are also available however the laser is not visible to the naked eye. Diode lasers are able to produce different wave lengths and power output. Because of the great variances some lasers are limited in ability and cannot keep its pencil like beam for long distances. On the other hand, some lasers are able to cut through materials or can keep their concentrated beam together for miles. The versatility of this type of laser is the reason it is the most used across all industries.

Since the initial introduction these lasers have taken off in popularity, being further developed for a number of industries and various purposes. Products that use diode lasers are devices for our entertainment like CD/DVD players, movie projectors and game counsels. Different appliances in the work place such as barcode readers, computer mice, fiber optics, telecommunications, printers and scanners. Further, the medical and dental industries use lasers in many procedures as well as salons for cosmetic purposes. Manufacturers, distributors and service industries use lasers for cutting, cladding, engraving, welding, heat-treating and inventory. The military also utilizes lasers for many applications from deterring enemies to developing weapons that will destroy missiles or vehicles.