Current location - Music Encyclopedia - Today in History - How long is the history of laser?
How long is the history of laser?
First, the emergence and development of laser.

19 16 Einstein's theory of "spontaneous and stimulated radiation" is the physical basis of modern laser systems. However, after more than 40 years, no one has confirmed the existence of stimulated radiation in the laboratory. In 1950s, due to the rapid development of radio technology, Sholo and Towns expanded the research scope of electromagnetic waves from short wave to microwave band according to Einstein's theory, and successfully developed an instrument called maser at that time, namely microwave maser, also known as microwave quantum amplifier, which can make the microwave beam more concentrated. 1958, they extended the principle of maser from microwave to spectral band and put forward laser theory. Theodore Maiman is here at this time? %F