An optical element containing silica glass manufacturing method

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PROBLEM TO BE SOLVED : To provide a method of manufacturing rare earth metal element-containing silica glass for optics which is small in optical loss due to scattering or absorption, low in OH concentration and high in luminance efficiency. SOLUTION : In the method for manufacturing the rare earth metal element-containing silica glass for optics by heating and melting a powdery mixture comprising silica powder, a rare earth metal element and powder containing Al, the powdery mixture having ≤10 μm 50% diameter in volume particle distribution and containing COPYRIGHT : (C)2007, JPO&INPIT