Yb: KGW laser crystal has great potential for high power diode pumped laser system and high power, short pulse time femtosecond lasers and their wide application, because of its superiority of large absorption coefficient, low quantum defect, large absorption bandwidth, long emission lifetime and emission cross section, etc.
Thermal conductivity | Ka=2.6 W/mK, Kb=3.8 W/mK, Kc=3.4 W/mK |
Thermal optical coefficient @1064 nm | dnp/dT=-15.7 * 10-6 K-1 |
dnm/dT=-11.8 * 10-6 K-1 | |
dng/dT=-17.3 * 10-6 K-1 | |
Thermal expansion | αa=4X10-6 /°C |
αb=3.6X10-6 /°C | |
αc=8.5X10-6 /°C | |
Melting temperature | 1075 °C |
Absorbtion cross section | 1.2X10-19 cm2 |
Stimulated emission cross section (E| |a) | 2.6X10-20 cm2 |
Laser wavelength | 1023-1060 nm |
Lasing threshold | 35 mW |
Stark levels energy (in cm-1) of the 2F5/2 manifolds of Yb3+ @ 77 K | 10682, 10471, 10188 |
Stark levels energy (in cm-1) of the 2F7/2 manifolds of Yb3+ @ 77K | 535, 385, 163, 0 |
optical damage threshold, GW/cm2 | 20 |
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