The first Chinese called "laser", "Les", it is the name of English LASER transliteration, meaning "light amplification by stimulated emission of radiation". The principle of laser as early as 1916 has been discovered by the famous American physicist Einstein. In 1964, according to China's famous scientist Tsien Hsueshen suggested that "light stimulated emission" was renamed "laser". Laser application is very extensive, mainly laser marking, optical fiber
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