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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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              Copyright? CASTECH Inc. all rights reserved 闽ICP备12014619号 Copyright 2012-2017 51helpdesk.com

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