| 摘要 |
Disclosed is a substantially transparent glass-ceramic ceramic, and a method for making a glass-ceramic, exhibiting an aluminogallate spinel crystal phase and having a glass-ceramic composition that lies within the SiO<HIL><PDAT>2</SB><PDAT>-Ga<HIL><PDAT>2</SB><PDAT>O<HIL><PDAT>3</SB><PDAT>-Al<HIL><PDAT>2</SB><PDAT>O<HIL><PDAT>3</SB><PDAT>-K<HIL><PDAT>2</SB><PDAT>O-Na<HIL><PDAT>2</SB><PDAT>O- system and particularly consisting essentially, in weight percent on an oxide basis, of 25-55% SiO<HIL><PDAT>2</SB><PDAT>, 9-50% Ga<HIL><PDAT>2</SB><PDAT>O<HIL><PDAT>3</SB><PDAT>, 7-33% Al<HIL><PDAT>2</SB><PDAT>O<HIL><PDAT>3</SB><PDAT>, 0-20% K<HIL><PDAT>2</SB><PDAT>O, 0-15% Na<HIL><PDAT>2</SB><PDAT>O, 0-6 Li<HIL><PDAT>2</SB><PDAT>O and 5-30% K<HIL><PDAT>2</SB><PDAT>O+Na<HIL><PDAT>2</SB><PDAT>O, the glass ceramic microstructure containing a crystal phase comprising at least 5%, by weight, of aluminogallate spinel crystals. Another aspect disclosed is optical element selected from the group consisting of an optical fiber, a gain or laser medium, and an amplifier component, a saturable absorber, with the element comprising a transparent glass-ceramic of the same composition and containing a crystallinity of at least about 5% by weight of aluminogallate spinel crystals.</PTEXT>
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