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How long have lasers been around?

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How long have lasers been around?

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  1. MASERs were discussed in 1952.  First one in 1953 (m stands for microwave).

    The first "Optical maser" was in 1960, later renamed LASER (where the L stands for Light)


  2. Since the 1960's, IIRC.

  3. According to Wikipedia the first laser was demonstrated on May 16, 1960.

  4. Since 1960's

  5. since 1960 i believe.
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