New applications of laser technology are being developed constantly. Laser technology was long the stuff of science fiction, but today it is used in CD players, dental drills, laser saws, high-speed metal cutting machines, measuring systems and a host of other products.
The word laser stands for Light Amplification by the Stimulation Emission of Radiation. In 1916, Albert Einstein developed the theory of Stimulated Emission. Simply put, it is a process where a photon is emitted from an atom and crashed into other atoms, causing them to also emit photons. In a vacuum chamber, more and more photons bounce around, raising the energy level within the chamber. When the energy has built up sufficiently, it exits the chamber as a narrow beam of light. Although Einsteins work was explored during the 1920s, it was largely forgotten until, in 1954, Charles Townes, an American physicist, started investigating microwave light.
The 60s heralded new breakthroughs in laser technology. Theodore Maiman built the first working optical light laser in 1960. It used a solid state laser that incorporated a synthetic ruby. The first semiconductor laser was developed in...
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