Spectroscopic Properties and Laser Operation of Nd: Y3ScAl4O12 Polycrystalline Gain Media, Solid-Solution of Nd: Y3Al5O12 and Nd: Y3Sc2Al3O12 Ceramics
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Transparent Nd3+-doped Y3ScAl4O12 (Nd: Y3ScAl4O12) ceramics with up to 5.0-at.% Nd3+-concentration (CNd) were fabricated by a solid-state reaction method using commercial 4N powders. Spectroscopic properties of this media, such as absorption and emission spectra, the fluorescence lifetime, and the influence of increasing CNd on these characteristics are discussed. It is shown that high absorption efficiency of the pump radiation that is necessary for efficient operation of a Nd: Y3ScAl4O12 microchip laser can be obtained by increasing CNd. One-micron laser operation with 113-mW output power (7.7% optical-to-optical overall efficiency) and 9.6% slope efficiency was demonstrated from a 1.0-mm thick, 5.0-at.% Nd: Y3ScAl4O12 uncoated sample under 808-nm pumping by a Ti: Sapphire laser. Further works are directed toward optimization of the fabricating process in order to reduce the optical losses that are found to increase with increasing CNd.
- 公益社団法人 日本セラミックス協会の論文
公益社団法人 日本セラミックス協会 | 論文
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