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The optimization design of photo-electric coupling mechanism of Er~(3+) doped in mid-infrared laser crystals at the wavelength of ~3 μm

Chaoyang Tu  Yan Wang  Zhenyu You  Zhaojie Zhu  Jianfu Li  Junlong Xu  
【摘要】:The mid-infrared solid lasers at the wavelength of 2.7~3μm have drawn much attention for enormous applications in medicine,detection and remote sensors etc.Er~(3+) doping in matrix can be served as an active ion to achieve 2.7~3μm lasers effectively through its ~4I_(11/2)→~4I_(13/2) transition.There were many reports about Er~(3+) as an active ion concentrate mainly on oxide hosts(crystals and ceramics) like YAG,YSGG and fluoride hosts like CaF_2,SrF_2,etc.However,the efficiencies of these lasers are low because of the scientific problems,such as the high nonradiative transition probability,self-termination effect,low absorption efficiency,multiple luminescence competing channels,etc.which result in failure in meeting the demand of practical application.In order to overcome these disadvantages,some sensitizing ions,such as Nd~(3+),Pr~(3+),Tm~(3+) were co-coped into laser crystals for optimization design of photo-electric coupling mechanism of Er~(3+) ions in our work.Some new gallates and aluminates such as Gd_3Ga_5O_(12),ABC_3O_7(A=Ca,Sr,Ba,B=Y,Gd,La,C=Al,Ga),CaReAlO_4,Re_3Sc_2Ga_5O_(12),were used as hosts of mid-infrared laser crystals and their Er~(3+) co-doped with sensitizing ions laser crystals with high quality and larger sizes were grown.Their spectra and laser properties were also investigated.The microchip laser and passively Q-switched mid-infrared(MIR) solid state lasers with Bi_2Te_3/graphene hetero-structure saturable absorber(SA) were obtained for the first time.
【作者单位】:Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences
【基金】:National Nature Science Foundation of China(51472240,61675204 and 11304313) National Key Research and Development Program of China(2016YFB0701002) Strategic Priority Research Program of the Chinese Academy of Science(XDB20010200) Nature Science Foundation of Fujian Province(2015J05134 and 2015I0007)
【分类号】:O734;TN244
【正文快照】:
The optimization design of photo-electric coupling mechanism of Er~(3+) doped in mid-infrared laser crystals at the wavelength of ~3 μm@Chaoyang Tu$Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Str

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