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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1996),
  • paper CWG3

Cr4+:YAG laser crystal grown by the laser- heated pedestal growth method

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The laser-heated pedestal growth (LHFG) method is suitable for growing fiber crystal and for examining various growth conditions. Using this method, we have tried to make Cr4+:YAG laser crystal, which is promising as an ultrashort light source at communication wavelengths near 1.5 μm. It is commonly known that a strain region, which is called a facet, emerges in YAG crystal made from the melt, such as the one grown by the Czochralski method. The facetted region is inadequate for a lasing media. In the early stage of our study, the occurrence of such a strain region was inevitable. We discovered, however, a growing condition that suppresses facet formation. In this paper, we describe the production of the strain-free Cr4+:YAG crystal by the LHPG method and also its lasing characteristic.

© 1996 Optical Society of America

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