| http://www.w3.org/ns/prov#value | - Further, a laser using, as a medium, single crystal YAG, YVO4, forsterite (Mg2SiO4), YAlO3, or GdVO4, or polycrystal (ceramic) YAG, Y2O3, YVO4, YAlO3, or GdVO4 doped with one or a plurality of kinds of Nd, Yb, Cr, Ti, Ho, Er, Tm, and Ta as a dopant; an Ar ion laser; or a Ti: sapphire laser can perform continuous wave oscillation.
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