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Yb:KGW and Yb:KYW Laser Crystals

Yb:KGW and Yb:KYW Laser Crystals

Yb:KGW and Yb:KYW crystals have broad emission bandwidths and are used as lasing materials to generate ultrashort (~ 100-200 fs) high power pulses. Direct pump of Yb:KGW/KYW crystals with laser diodes operating at 981 nm supports compact laser systems.

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Code Material Coating Doping Orientation Dimensions Price Delivery Add to cart
YbKYW-0618-01 Yb:KYW AR/AR @ 980 + 1040 nm 1.5 % Np-cut 2 x 2 x 5 mm 748 $ 3 - 5 days

Name  Yb:KGW   Yb:KYW  
Yb3+ concentration 0.5-5% 0.5-100%
Crystal structure  monoclinic  monoclinic 
Lattice parameters a=8.095Å, b=10.43Å,
c=7.588Å, β=94.43°
a=8.05Å, b=10.35Å,
c=7.54Å, β=94°  
Thermal expansion αa=4X10-6 /°C,αb=3.6X10-6 /°C, 
αc=8.5X10-6 /°C 
-
Thermal conductivity Ka=2.6 W/mK, Kb=3.8 W/mK,
Kc=3.4 W/mK, 
-
Density 7.27 g/cm3 6.61 g/cm3
Mohs' hardness 4-5 4-5 
Melting temperature 1075 °C
Transmission range  0.35-5.5 μm 0.35-5.5 μm 
Refractive indices (λ=1.06 μm)  ng=2.037, np=1.986,
nm=2.033
 -
Thermo-optic coefficients @ 1064 nm dnp/dT=-15.7 x 10-6 K-1
dnm/dT=-11.8 x 10-6 K-1
dng/dT=-17.3 x 10-6 K-1
For 20% Yb:KYW
dnp/dT=-13.08 x 10-6 K-1
dnm/dT=-7.61 x 10-6 K-1
dng/dT=-11.83 x 10-6 K-1
Laser wavelength 1023-1060 nm  1025-1058 nm 
Fluorescence lifetime 0.3 ms  0.3 ms 
Stimulated emission
cross section (E| |a) 
2.6X10-20 cm2 3X10-20 cm
Absorbtion peak
and bandwidth 
αa=26 cm-1, λ=981 μm,
Δλ=3.7 nm
αa=26 cm-1, λ=981μm,
Δλ=3.7 nm
Absorbtion cross section 1.2X10-19 cm2 1.33X10-19 cm
Lasing threshold 35 mW 70 mW 
Stark levels energy (in cm-1) of the
2F5/2 manifolds of Yb3+ @ 77K 
 10682, 10471, 10188 10695, 10476, 10187 
Stark levels energy (in cm-1) of the
2F7/2 manifolds of Yb3+ @ 77K 
 535, 385, 163, 0 568, 407, 168, 0 

Yb:KGW and Yb:KYW Crystals Laser Lines and Harmonics Brochure
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Yb:KGW and Yb:KYW crystals have broad emission bandwidths and are used as lasing materials to generate ultrashort (~ 100-200 fs) high power pulses. Direct pump of Yb:KGW/KYW crystals with laser diodes operating at 981 nm supports compact laser systems. Yb:KGW/KYW laser generates pulses at 1023–1060 nm wavelength range. Also Yb:KGW and Yb:KYW can be used as ultrashort pulses amplifiers. We believe that Yb:KGW and Yb:KYW are some of the best materials for high power thin disk lasers generating femtosecond pulses.

Features:

  • High absorption coefficient at 981 nm
  • High stimulated emission cross section
  • Low laser threshold
  • Extremely low quantum defect  λpump/ λse
  • Broad polarized output at 1023–1060 nm
  • High slope efficiency with diode pumping (~ 60%)
  • High Yb doping concentration.

Custom manufacturing capabilities:

  • Various shapes (slabs, rods, cubes)
  • Different dopant levels
  • Diversified coatings
  • Attractive prices for introductory quantities to OEMs.

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