ruby maser

ruby maser

[′rü·bē ′mā·zər]
(physics)
A maser that uses a ruby crystal in the cavity resonator.
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References in periodicals archive ?
SPRINGFIELD - Ruby Maser of Springfield died April 6 of age-related causes.
1 Energy levels and population in Cr-doped ruby maser crystals; (a) before and (b) after pumping, that is, coupling of additional external RF energy to the signal.