While studying ruby, a chromium-doped variation of aluminium oxide, he came upon the idea of using this material as an active medium of a laser
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While studying ruby, a chromium-doped variation of aluminium oxide, he came upon the idea of using this material as an active medium of a laser
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-17 from Wikipedia. The archived copy is preserved so this citation survives link rot.