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    Yb:CaGdAlO4

    Yb:CaGdAlO4(called CALGO) is a promising new laser gain material which possess several important advantages. The crystal structure of CALGO is tetragonal. When it is pumped at 979nm under pi configuration, we can get broad emission spectra from 994nm to 1050nm in theta configuration. This implies a very small quantum defect (down to 1.5%) and gives a good expectation of obtaining ultra-short pulse. Its thermal conductivity is also high: k=6.7W/m/K, which means it can be used for high power laser applications.


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    CASTECH’s Yb:CaGdAlO4 is featured by

     ? High absorption coefficient @ 979 nm

     ? High stimulated emission cross section

     ? Low laser threshold

     ? Extremely low quantum defect

     ? Broad output at 994-1050 nm

     ? High slope efficiency with diode pumping (up to 55%)

     ? Various Yb-doping concentration


    Applications

    ? Over 5.5W output power is obtained by 23W incident pumping diode laser with 10% output coupler.

    ? Output power as high as 12.5W and 94fs pulses for 28W pumping power was reported. 


     

    Basic Properties:                                                                                                                     


    Crystal structure

    Tetragonal

    Point group

    I4/mmm

    Cell Parameters

    a = 3.6585?;

    c = 1.1978 ?   

    Mohs hardness  

    6

    Density, g/cm3

    4.8

    Melting Point(C°)

    1850

    Thermal conductivity (W/m/K)

    K[001] =6.3

    K[001] =6.9

    Thermal expansion coefficient (10-6 /K)

    10.1(//a); 

    16.2(//c)


    Lasing Wavelength

    994-1050nm


    Absorption Wavelength

    979nm

    Absorption Cross Section (phi configuration at 979nm) 

    2.7x(10-20)cm2

     


    Specifications of Yb:CaGdAlO4

    Orientation

    a or c

     Standard Dopant concentration (at. %)


    2%, 3%, 5%, 10%

    Maximum length


    50mm

    Length tolerance, mm             

    +0.5 / -0.2                     

    Diameter tolerance, mm

    +/-0.1

    Parallelism

    < 30”

    Perpendicularity

    < 15’ 

    Surface quality


    10/5 

    Coating

    AR-coated 

     


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  • Povo é criador da história e verdadeiro herói, diz Xi 2019-05-20
  • 佛山:用公积金买装配式住房 贷款额度或可上浮20% ——凤凰网房产北京 2019-05-19
  • 拉美国家新闻官员与记者宁夏考察采访活动结束 2019-05-18
  • Lorgane législatif national adopte la loi sur la supervision 2019-05-18
  • 外国记者谈上海合作组织青岛峰会: 新希望 新征程 2019-05-17
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