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What was the active medium used in the first working laser ever constructed?

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What was the active medium used in the first working laser ever constructed?
posted Nov 28, 2014 by Manikandan J

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1 Answer

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A ruby rod

Theodore Maiman built the first working laser using a ruby rod while working at Hughes Research Laboratories in Malibu, California. It lased for the first time on May 16, 1960.

answer Dec 1, 2014 by Vrije Mani Upadhyay
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