Abstract

We are developing high average power laser materials based on silica glass. The uniform dispersion of rare earth ions in SiO 2 glass, which is the most difficult thing to make laser material, was achieved by using rare earth distributed Zeolite X. Nd doped SiO 2 glass shows enough properties as a laser material, but its spectroscopic properties are weaker than commonly used phosphate glass. Some trial for improving the spectroscopic properties are done and it is shown that the co-doping effect in supercage of Zeolite X and that phosphoric acid treatment are useful.

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