中国物理B ›› 2018, Vol. 27 ›› Issue (6): 67801-067801.doi: 10.1088/1674-1056/27/6/067801

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Transition intensity calculation of Yb: YAG

Hong-Bo Zhang(张洪波), Qing-Li Zhang(张庆礼), Xing Wang(王星), Gui-Hua Sun(孙贵花), Xiao-Fei Wang(王小飞), De-Ming Zhang(张德明), Dun-Lu Sun(孙敦陆)   

  1. 1 School of Aeronautics and Astronautics Engineering, Air Force Engineering University, Xi'an 710038, China;
    2 The Key Laboratory of Photonic Devices and Materials of Anhui Province, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
  • 收稿日期:2017-12-18 修回日期:2018-03-20 出版日期:2018-06-05 发布日期:2018-06-05
  • 通讯作者: Qing-Li Zhang, Xing Wang E-mail:zql@aiofm.ac.cn;1678648615@qq.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos.61405206,51502292,and 51702322),the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant Nos.CXJJ-16M251 and CXJJ-15M055),and the National Key Research and Development Program of China (Grant No.2016YFB0402101).

Transition intensity calculation of Yb: YAG

Hong-Bo Zhang(张洪波)1, Qing-Li Zhang(张庆礼)2, Xing Wang(王星)1, Gui-Hua Sun(孙贵花)2, Xiao-Fei Wang(王小飞)2, De-Ming Zhang(张德明)2, Dun-Lu Sun(孙敦陆)2   

  1. 1 School of Aeronautics and Astronautics Engineering, Air Force Engineering University, Xi'an 710038, China;
    2 The Key Laboratory of Photonic Devices and Materials of Anhui Province, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2017-12-18 Revised:2018-03-20 Online:2018-06-05 Published:2018-06-05
  • Contact: Qing-Li Zhang, Xing Wang E-mail:zql@aiofm.ac.cn;1678648615@qq.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos.61405206,51502292,and 51702322),the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant Nos.CXJJ-16M251 and CXJJ-15M055),and the National Key Research and Development Program of China (Grant No.2016YFB0402101).

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摘要： The Yb:YAG is an excellent high-average power and ultra-short pulse laser crystal. Transition intensity parameters Atpk and Huang-Rhys factors are fitted to its emission spectrum by the full-profile fitting method. Calculated results indicate that the emission spectrum of Yb:YAG at cryogenic temperature consists of three pure electron state transitions and two phonon-assisted transitions, one vibronic transition releases one-phonon of 3 cm-1, and the other vibronic transition absorbs one-phonon of 22 cm-1. At 300 K, the phonon assisted transition of 3 cm-1 turns into two-or more-phonon assisted transitions. The procedure absorbing phonon can reduce the thermal load of Yb:YAG and improve the laser efficiency, which may be one of the reasons why Yb:YAG has excellent performance. The emission bands of Yb:YAG are broadened thermally, and the peak values decrease by several times. The emission cross sections of Yb:YAG determined by Fuchtbauer-Ladenburg (F-L) formula are remarkably different from those calculated with Atpk, which indicates that it is necessary for a laser material to determine its transition intensity parameters Atpk in order to reasonably evaluate the laser performance.

关键词: transition intensity parameters, rare earth, photoluminescence, Yb3+:YAG

Abstract: The Yb:YAG is an excellent high-average power and ultra-short pulse laser crystal. Transition intensity parameters Atpk and Huang-Rhys factors are fitted to its emission spectrum by the full-profile fitting method. Calculated results indicate that the emission spectrum of Yb:YAG at cryogenic temperature consists of three pure electron state transitions and two phonon-assisted transitions, one vibronic transition releases one-phonon of 3 cm-1, and the other vibronic transition absorbs one-phonon of 22 cm-1. At 300 K, the phonon assisted transition of 3 cm-1 turns into two-or more-phonon assisted transitions. The procedure absorbing phonon can reduce the thermal load of Yb:YAG and improve the laser efficiency, which may be one of the reasons why Yb:YAG has excellent performance. The emission bands of Yb:YAG are broadened thermally, and the peak values decrease by several times. The emission cross sections of Yb:YAG determined by Fuchtbauer-Ladenburg (F-L) formula are remarkably different from those calculated with Atpk, which indicates that it is necessary for a laser material to determine its transition intensity parameters Atpk in order to reasonably evaluate the laser performance.

Key words: transition intensity parameters, rare earth, photoluminescence, Yb3+:YAG

中图分类号:  (Photoluminescence, properties and materials)

  • 78.55.-m
78.60.Lc (Optically stimulated luminescence) 75.10.Dg (Crystal-field theory and spin Hamiltonians)