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Nonlinear Crystals

  • Product Name: BBO
  • Dimension Tolerance:W x H (+/- 0.1mm) x L (+0.5/-0.1mm)
  • Angle Tolerance:Δθ ≤ 0.25°, Δφ ≤ 0.25°
  • Parallelism:< 20 arc seconds
  • Perpendicularity:< 5 arc minutes
  • Chamfer:0.1mm at 45°
  • Clear Aperture:90%
  • Scratch and Dig:20/10
  • Surface Flatness:λ/8 at 633nm
  • Wavefront Distortion:λ/8 at 633nm
  • Damage Threshold :> 0.5 GW/cm2 at 1064nm, TEM00, 10ns, 10Hz> 0.3 GW/cm2 at 532nm, TEM00, 10ns, 10Hz

Product overview

BBO crystal or Beta-Barium Borate (β-BaB2O4), has large effective second harmonic generation (SHG) coefficient about 6 times greater than that of KDP crystal, as well as excellent electro-optic crystal applied in the application of high power laser system at working wavelength from 200nm to 2500nm, such as a Q-switching CW diode pumped Nd:YAG laser and so on.



Scitlion is able to offer
Size upto 15 x 15 x 15mm
Length from 0.02mm to 25mm
Coating upon your request

Density

3.85 g/cm3

Melting Point

1095℃

Mohs Hardness

4

Thermal Conductivity

1.2 W/m/K (⊥c-axis)

1.6 W/m/K (∥c-axis)

Crystal Structure

Trigonal

Lattices Constans

a=b=12.532A,  c=12.717A

Optical and Nonlinear Optical Properties

Transparency Range

190nm-3500nm

SHG Phase Matchable Range

409.6 nm-3500 nm (Type I)

525nm-3500nm (Type II)

Thermal-Optic Coefficients 

dno/dT=-16.6×10-6/K

dne/dT=-9.3×10-6 /K

Absorption Coefficients

< 0.1% cm-1 at 1064nm

 < 1% cm-1 at 532nm

Angle Acceptance

0.8 mrad·cm-1      (θ, Type I, 1064 SHG)   
1.27 mrad·cm-1    (θ, Type II, 1064 SHG)

Temperature Acceptance

55 ℃·cm-1

Spectral Acceptance

1.1 nm·cm-1

Walk-off Angle

2.7° (Type I, 1064 SHG)

3.2° (Type II, 1064 SHG)

NLO Coefficients

deff (I)=d31sinθ+(d11cosΦ-d22sin3Φ)cosθ
deff (II)=(d11sin3Φ+d22cos3Φ)cos2θ

Non-vanished NLO Susceptibilities

d11=5.8×d36 (KDP)

 d31=0.05×d11

d22<0.05×d11

Sellmeier Equations (λ in μm )

no2=2.7359+0.01878 / (λ2-0.01822) -0.01354 λ2
ne2=2.3753+0.01224 / (λ2-0.01667) -0.01516 λ2

Electro-optic Coefficients

r22=2.7 pm/V

Half-wave Voltage

7 kV (at 1064 nm, 3×3×20 mm3)

Resistivity

> 1011 Ω·cm

Relative Dielectric Constant

εs11/εo:6.7

εs33/εo:8.1

Tan δ<0.001