中国物理B ›› 2008, Vol. 17 ›› Issue (10): 3635-3639.doi: 10.1088/1674-1056/17/10/017

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Judd--Ofelt analysis of spectra and experimental evaluation of laser performance of Tm3+ doped Lu2SiO5 crystal

姚宝权1, 郑亮亮1, 段小明1, 赵广军2, 宗艳花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:2007-12-04 修回日期:2008-01-06 出版日期:2008-10-20 发布日期:2008-10-20
  • 基金资助:
    Project supported by the Program of Excellent Team in Harbin Institute of Technology, China (Grant No 60878011).

Judd--Ofelt analysis of spectra and experimental evaluation of laser performance of Tm3+ doped Lu2SiO5 crystal

Yao Bao-Quan(姚宝权)a)† , Zheng Liang-Liang(郑亮亮)a), Duan Xiao-Ming(段小明)a), Zhao Guang-Jun(赵广军)b), and Zong Yan-Hua(宗艳花)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:2007-12-04 Revised:2008-01-06 Online:2008-10-20 Published:2008-10-20
  • Supported by:
    Project supported by the Program of Excellent Team in Harbin Institute of Technology, China (Grant No 60878011).

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摘要： This paper reports that the Tm$^{3 + }$:Lu$_{2}$SiO$_{5}$ (Tm:LSO) crystal is grown by Czochralski technique. The room-temperature absorption spectra of Tm:LSO crystal are measured on a b-cut sample with 4 at.{\%} thulium. According to the obtained Judd--Ofelt intensity parameters $\Om _{2}$=9.3155$\times $10$^{ - 20 }$\,cm$^{2}$, $\Om_{4}$=8.4103$\times $10$^{ - 20 }$\,cm$^{2}$, $\Om_{6}$=1.5908$\times $10$^{ - 20 }$\,cm$^{2}$, the fluorescence lifetime is calculated to be 2.03\,ms for $^{3}$F$_{4} \to {}^{3}$H$_{6}$ transition, and the integrated emission cross section is 5.81$\times $10$^{ - 18 }$\,cm$^{2}$. Room-temperature laser action near 2\,$\mu $m under diode pumping is experimentally evaluated in Tm:LSO. An optical-optical conversion efficiency of 9.1{\%} and a slope efficiency of 16.2{\%} are obtained with continuous-wave maximum output power of 0.67\,W. The emission wavelengths of Tm:LSO laser are centred around 2.06\,$\mu $m with spectral bandwidth of $\sim $13.6\,nm.

关键词: Tm:Lu2SiO5, Judd--Ofelt analysis, solid-state lasers, diode-pumped

Abstract: This paper reports that the Tm$^{3 + }$:Lu$_{2}$SiO$_{5}$ (Tm:LSO) crystal is grown by Czochralski technique. The room-temperature absorption spectra of Tm:LSO crystal are measured on a b-cut sample with 4 at.% thulium. According to the obtained Judd--Ofelt intensity parameters $\varOmega _{2}$=9.3155$\times $10$^{ - 20 }$ cm$^{2}$, $\varOmega_{4}$=8.4103$\times $10$^{ - 20 }$ cm$^{2}$, $\varOmega_{6}$=1.5908$\times $10$^{ - 20 }$ cm$^{2}$, the fluorescence lifetime is calculated to be 2.03 ms for $^{3}$F$_{4} \to {}^{3}$H$_{6}$ transition, and the integrated emission cross section is 5.81$\times $10$^{ - 18 }$ cm$^{2}$. Room-temperature laser action near 2 $\mu $m under diode pumping is experimentally evaluated in Tm:LSO. An optical-optical conversion efficiency of 9.1% and a slope efficiency of 16.2% are obtained with continuous-wave maximum output power of 0.67 W. The emission wavelengths of Tm:LSO laser are centred around 2.06 $\mu $m with spectral bandwidth of $\sim $13.6 nm.

Key words: Tm:Lu2SiO5, Judd--Ofelt analysis, solid-state lasers, diode-pumped

中图分类号:  (Growth from melts; zone melting and refining)

  • 81.10.Fq
78.55.Hx (Other solid inorganic materials) 78.30.Hv (Other nonmetallic inorganics) 78.40.Ha (Other nonmetallic inorganics) 42.55.Xi (Diode-pumped lasers) 42.55.Rz (Doped-insulator lasers and other solid state lasers)