Spectroscopic Properties and Continuous Wave Laser Performances at 1064 nm of Nd3+: LuAG Transparent Ceramic

• Published in: IEEE photonics journal 2017-04, Vol.9 (2), p.1-14
• Main Authors: Ma, Chaoyang, Zhu, Jiangfeng, Hu, Zhongqi, Wen, Zicheng, Long, Jiaqi, Yuan, Xuanyi, Cao, Yongge
• Format: Article
• Language: English
• Subjects: Absorption; Ceramics; Diode-pumped lasers; Fluorescence; Ions; Laser excitation; Manifolds; optical and other properties; oxide materials; solid-state lasers; spectroscopy; Wavelength measurement
• ISSN: 1943-0655; 1943-0647
• DOI: 10.1109/JPHOT.2017.2682850

A transparent 2 at% Nd 3+ -doped Lu 3 Al 5 O 12 (LuAG) ceramic was fabricated by using tape-casting method and solid-state sintering technology. Based on the room temperature absorption spectrum, the three J-O intensity parameters were calculated with Judd-Ofelt analysis, and then, the radiative transition rates and branching ratios of transitions from 4 F 3/2 manifold to the 4I J' (J' = 13/2, 11/2, 9/2) lower lying multiple manifolds were determined. The quantum efficiency of 80.4% was evaluated from the measured fluorescence lifetime and the radiative lifetime of the 4 F 3/2 manifold state. Also, the inter-Stark energy levels of the 4I. J' manifolds were performed, and the peak emission cross sections of the 4 F 3/2 → 4I J' intermanifold transitions were determined. The total emission cross section for 4 F 3/2 → 4 I 9/2 , 4 I 11/2 , and 4 I 13/2 transitions was calculated to be 7.41 × 10 -20 cm 2 , 29.83 × 10 -20 cm 2 , and 10.53 × 10 -20 cm 2 , respectively. Finally, under an 808 nm diode laser pumping, the continuous wave laser performances of the Nd:LuAG transparent ceramic were investigated.