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Yb3+: CaF2 - Ytterbium Doped Calcium Fluoride

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Yb3+: CaF2 - Ytterbium Doped Calcium Fluoride
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  • Yb3+: CaF2 - Ytterbium Doped Calcium Fluoride

  • Yb3+:CaF2, grown by Czochralski tech., is with long fluorescent lifetime and broad absorption bands, making it suitable for diode pumping. It has limited nonlinear effects under intense irradiation.
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Introduction

Ytterbium-doped Calcium fluoride (Yb: CaF2), grown by Czochralski technique, is with long fluorescence lifetime and broad absorption bands, which make it an ideal material for laser diode pumping. Yb:CaF2 exhibits broad emission bandwidth as well as limited non-linear effects under intense irradiation, supporting generation of ultra-short pulses and high-power operation.

 

CASTECH's laser crystal Yb: CaF2 is featured by

•  Low quantum defect ,Long fluorescence lifetime

•  Wide optical transmission range, from 0.12μm to 10μm

•  Low dispersion behavior

•  Limited nonlinear effects under intense laser irradiation

•  Customized coatings are available

 

Table 1. Basic Properties

Dopant Concentration

1~10 at.%

Absorption Peak Wavelength 

979 nm

Absorption Cross Section @980 nm

5.4 × 10-21 cm2

Emission Cross Section @1035 nm

2.3 × 10-21 cm2

Fluorescence Lifetime 

2.2 ms

Refractive Index @1035 nm

1.42866 

Crystal Structure

Cubic

Cleavage Plane

(111)

Melting Point

1418 ℃

Nonlinear Refractive Index

1.9×10-16 cm2/W

Density

3.18 g/cm3

Thermal Conductivity

9.71 W/m/K

Thermal Expansion Coefficient 

18.41×10-6 /K

Mohs Hardness

4 Mohs

 

 

                                                               

 

Figure 1. Absorption Coefficient and Transimission Spectra of a 3.0 at.%Yb3+ Doped CaF2 Crystal

                          

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