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Chin. Phys. B, 2008, Vol. 17(10): 3635-3639    DOI: 10.1088/1674-1056/17/10/017
NUCLEAR PHYSICS Prev   Next  

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)
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
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.
Keywords:  Tm:Lu2SiO5      Judd--Ofelt analysis      solid-state lasers      diode-pumped  
Received:  04 December 2007      Revised:  06 January 2008      Accepted manuscript online: 
PACS:  81.10.Fq (Growth from melts; zone melting and refining)  
  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)  
Fund: Project supported by the Program of Excellent Team in Harbin Institute of Technology, China (Grant No 60878011).

Cite this article: 

Yao Bao-Quan(姚宝权), Zheng Liang-Liang(郑亮亮), Duan Xiao-Ming(段小明), Zhao Guang-Jun(赵广军), and Zong Yan-Hua(宗艳花) Judd--Ofelt analysis of spectra and experimental evaluation of laser performance of Tm3+ doped Lu2SiO5 crystal 2008 Chin. Phys. B 17 3635

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