Spectral and Laser Properties of Yb:LuAG Transparent Ceramics Fabricated by Tape Casting Method

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• 作者：Chaoyang Ma ; Fei Tang ; Jiangfeng Zhu ; Miaomiao Du ; Xuanyi Yuan ; Yang Yu ; Ke Wang ; Zicheng Wen ; Jiantao Zhang ; Jiaqi Long ; Wang Guo and Yongge Cao
• 刊名：Journal of the American Ceramic Society
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：99
• 期：10
• 页码：3267-3272
• 全文大小：1343K
• ISSN：1551-2916

文摘

Yb³⁺-doped LuAG laser ceramics with different Yb³⁺-doping concentrations were successfully fabricated by nonaqueous tape casting method and vacuum sintering technology. XRD patterns and SEM morphologies of the ceramics were presented. The optical in-line transmittance of the Yb-doped LuAG ceramics was about 83% at 1030 nm. The fluorescence lifetime of annealed and unannealed ceramic samples was compared. From the spectroscopic properties, it can be seen that the ceramics had a large emission cross section of 2.9 × 10⁻²⁰ cm² with a FWHM of about 7.2 nm at 1030 nm. Under 100% population inversion, the maximum gain coefficient was estimated to be 12.4 cm⁻¹ at 1030 nm. With a fiber-coupled diode laser as pump source, CW laser at 1030 nm was demonstrated and the maximum output power of 338.9 mW was achieved with a slop efficiency of 19%. A tuning range from 1028 to 1036 nm was obtained.