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. 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.

If you are looking for a stock items, please click here.

Delivery

Estimated delivery time: from15 - 16 days

Doping
Orientation
Dimensions
Material
Coating
Code Doping Orientation Dimensions Material Coating Price Delivery Add to cart
KGW-0324-21 3 % Ng-cut 4.2x2x3 mm Yb:KGW AR/AR@975-1070 nm, 1 deg wedge Request 15 - 16 days To cart
KGW-0324-02 5 % - 5x5x1 mm Yb:KGW uncoated Request 15 - 16 days To cart
KGW-0324-03 5 % b-cut 5x5x1 mm Yb:KGW AR/HR@930-1070/(1020-1070)+(940-980) nm Request 15 - 16 days To cart
KGW-0324-07 5 % b-cut 4x4x3 mm Yb:KGW uncoated Request 15 - 16 days To cart
KGW-0324-08 5% Ng-cut 3x3x2 mm Yb:KGW AR/AR@980-1080 nm Request 15 - 16 days To cart
KGW-0324-09 5 % b-cut 2x2x3 mm Yb:KGW uncoated Request 15 - 16 days To cart
KGW-0324-10 5 % b-cut 1x5x5 mm Yb:KGW uncoated Request 15 - 16 days To cart
KGW-0324-11 5 % b-cut 1x5x4 mm Yb:KGW uncoated Request 15 - 16 days To cart
KGW-0324-12 5 % b-cut 1x5x3 mm Yb:KGW uncoated Request 15 - 16 days To cart
KYW-0327-01 10 % b-cut Ø3x2 mm Yb:KYW AR/AR@1030/981-1030 nm Request 15 - 16 days To cart
KYW-0327-02 10 % b-cut Ø3x1 mm Yb:KYW AR/AR@1030/981-1030 nm Request 15 - 16 days To cart
KYW-0324-06 10 % b-cut 5x5x0.6 mm Yb:KYW uncoated Request 15 - 16 days To cart
KYW-0324-07 10 % - 5x5x0.5 mm Yb:KYW uncoated Request 15 - 16 days To cart
KYW-0324-10 10 % b-cut 3x3x2 mm Yb:KYW uncoated Request 15 - 16 days To cart
KYW-0324-12 10 % - 3x3x1 mm Yb:KYW BBAR/BBAR@980-1040 nm Request 15 - 16 days To cart
KYW-0324-13 10 % - 3x3x0.5 mm Yb:KYW BBAR/BBAR@980-1040 nm Request 15 - 16 days To cart
KYW-0324-14 10 % Np-cut 3x3x0.4 mm Yb:KYW uncoated Request 15 - 16 days To cart
KYW-0324-15 10 % b-cut 3x2.7x1 mm Yb:KYW uncoated Request 15 - 16 days To cart
KYW-0324-16 10 % - 2x3x1 mm Yb:KYW AR/AR@980-1045 nm Request 15 - 16 days To cart
KYW-0324-17 10 % - 2x3x1 mm Yb:KYW uncoated Request 15 - 16 days To cart
KYW-0324-20 5 % b-cut 2.5x7x3.6 mm Yb:KYW uncoated Request 15 - 16 days To cart
Delicious

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 

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