中国物理B ›› 2009, Vol. 18 ›› Issue (3): 1009-1013.doi: 10.1088/1674-1056/18/3/027

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Judd--Oflet analysis of spectrum and laser performance of Ho:YAP crystal end-pumped by 1.91-μm Tm:YLF laser

姚宝权1, 郑亮亮1, 杨晓涛1, 王天衡1, 段小明1, 赵广军2, 董勤2   

  1. (1)National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China; (2)R&D Center for Laser and Opto-Electronic Materials, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 收稿日期:2008-06-19 修回日期:2008-07-05 出版日期:2009-03-20 发布日期:2009-03-20
  • 基金资助:
    Project supported by the Program of Excellent Team in Harbin Institute of Technology of China.

Judd--Oflet analysis of spectrum and laser performance of Ho:YAP crystal end-pumped by 1.91-μm Tm:YLF laser

Yao Bao-Quan(姚宝权)a), Zheng Liang-Liang(郑亮亮)a), Yang Xiao-Tao(杨晓涛)a), Wang Tian-Heng(王天衡)a), Duan Xiao-Ming (段小明)a), Zhao Guang-Jun(赵广军)b), and Dong Qin(董勤)b)   

  1. a National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China; b R&D Center for Laser and Opto-Electronic Materials, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2008-06-19 Revised:2008-07-05 Online:2009-03-20 Published:2009-03-20
  • Supported by:
    Project supported by the Program of Excellent Team in Harbin Institute of Technology of China.

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摘要： The Ho:YAP crystal is grown by the Czochralski technique. The room-temperature polarized absorption spectra of Ho:YAP crystal was measured on a c-cut sample with 1 at% holmium. According to the obtained Judd--Ofelt intensity parameters Ω2=1.42× 1020 cm2, Ω4=2.92× 1020 cm2, and Ω 6=1.71× 1020 cm2, this paper calculated the fluorescence lifetime to be 6 ms for 5I7→5I8 transition, and the integrated emission cross section to be 2.24× 10-18 cm2. It investigates the room-temperature Ho:YAP laser end-pumped by a 1.91-μm Tm:YLF laser. The maximum output power was 4.1 W when the incident 1.91-μm pump power was 14.4 W. The slope efficiency is 40.8%, corresponding to an optical-to-optical conversion efficiency of 28.4%. The Ho:YAP output wavelength was centred at 2118 nm with full width at half maximum of about 0.8 nm.

关键词: Ho:YAlO3, solid-state lasers, Judd--Ofelt analysis, Tm:YLF laser

Abstract: The Ho:YAP crystal is grown by the Czochralski technique. The room-temperature polarized absorption spectra of Ho:YAP crystal was measured on a c-cut sample with 1 at% holmium. According to the obtained Judd--Ofelt intensity parameters $\varOmega$2=1.42× 1020 cm2, $\varOmega$4=2.92× 1020 cm2, and $\varOmega$6=1.71× 1020 cm2, this paper calculated the fluorescence lifetime to be 6 ms for 5I7→5I8 transition, and the integrated emission cross section to be 2.24× 10-18 cm2. It investigates the room-temperature Ho:YAP laser end-pumped by a 1.91-μm Tm:YLF laser. The maximum output power was 4.1 W when the incident 1.91-μm pump power was 14.4 W. The slope efficiency is 40.8%, corresponding to an optical-to-optical conversion efficiency of 28.4%. The Ho:YAP output wavelength was centred at 2118 nm with full width at half maximum of about 0.8 nm.

Key words: Ho:YAlO3, solid-state lasers, Judd--Ofelt analysis, Tm:YLF laser

中图分类号:  (Doped-insulator lasers and other solid state lasers)

  • 42.55.Rz
42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation) 42.55.Xi (Diode-pumped lasers) 78.40.Ha (Other nonmetallic inorganics) 78.30.Hv (Other nonmetallic inorganics) 78.55.Hx (Other solid inorganic materials)