Spectral properties of Nd3+-doped Sr3Ga2Ge4O14 crystal

✍ Scribed by Anhua Wu; Shangke Pan; Jiayue Xu; Hui Shen; Norihito Saito; Takayo Ogawa; Satoshi Wada

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 402 KB
• Volume: 277
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2007.05.020

✦ Synopsis

Neodymium doped strontium gallogermanate crystals were grown successfully by the Bridgman technique. The linear thermal expansion coefficients for the c-and a-axes were measured as 5.8 • 10 À6 °CÀ1 and 6.5 • 10 À6 °CÀ1 . Absorption spectra, and fluorescence spectra, as well as fluorescence decay curves of Nd 3+ -doped Sr 3 Ga 2 Ge 4 O 14 crystal, have been recorded at room temperature and used to calculate the absorption and stimulated emission cross-sections. Based on the Judd-Ofelt theory, three intensity parameters were obtained. The luminescent quantum efficiency of the 4 F 3/2 level was determined to be approximately 73.8% for this material. Compared with other Nd 3+ -doped laser crystals, Nd 3+ -doped Sr 3 Ga 2 Ge 4 O 14 crystal displays special laser properties due to its disorder structure.