Products -> Crystal -> BBO
 
BBO           Beta Barium Borate
 
BBO (beta-BaB2O4 ) is a nonlinear optical crystal which combines a number of unique features. These features include wide transparency and phase matching ranges, large nonlinear coefficient, high damage threshold and excellent optical homogeneity. Therefore, BBO provides an attractive solution for various nonlinear optical applications.
 
BBO crystal is also an excellent electro-optic crystal for high power applications at the wavelength range from 200nm to 2500nm. It can be used for Q-Switching in a CW diode pumped Nd:YAG laser with average power>50W.
 
Main Features
 
  • Good mechanical and physical properties
  • Broad phase-matchable second-harmonic-generation (SHG) range from 409.6 nm to 3500 nm
  • Wide transmission region from 190 nm to 3500 nm
  • Large effective SHG coefficient
  • High damage threshold of 10 GW/cm2 for 100 ps pulse-width at 1064 nm
  • High optical homogeneity with Δn=10-6/cm
  • Wide temperature-bandwidth of about 55℃ (for type I SHG 1064 nm)
 
Typical Applications
 
  • Second, third, fourth and fifth harmonic generation of Nd:YAG and Nd:YLF laser
  • Frequency-doubling, -tripling and -mixing of Dye lasers
  • Second, third and fourth harmonic generation of Ti:Sapphire and Alexandrite lasers
  • Optical parametric amplifier (OPA) and optical parametric oscillators (OPO)
  • Frequency-doubling of Argon ion, Cu-vapor and Ruby lasers
  • Research and development for advanced laser techniques, including all-solid state wide-tunable lasers, ultrafast pulse lasers, and DUV lasers
 
Specifications
 
Dimension Tolerance (W±0.1mm) x (H±0.1mm) x (L±0.2mm)
Angle Tolerance Δθ< 0.5°, ΔΦ< 0.5°
Surface Flatness <λ/8@633 nm
Surface Quality Better than 20/10 Scratch and Dig
Parallelism < 20 arc seconds
Perpendicularity < 5 arc minutes
Clear Aperture > 90% Central
Wavefront Distortion <λ/4@633 nm
 
Physical and Optical Properties 
 

Crystal Structure

trigonal, space group R3c

Cell Parameters

a = b = 12.532Å, c = 12.717Å, Z = 6

Melting Point

1095±5oC

Transition Temperature

925±5oC

Optical Homogeneity

10-6/cm

Mohs Hardness

4.5

Density

3.85 g/cm3

Linear Absorption Coefficient

< 0.1%/cm (at 1064 nm)

Hygroscopic Susceptibility

low

Resistivity

> 1011 ohm/cm

Relative Dielectric Constant

eT11/e0: 6.7, eT33/e0: 8.1
Tan d, < 0.001

Thermal Expansion Coefficients(in the range of 25-900℃)

^c, 4 x 10-6/K
||c, 36 x 10-6/K

Thermal Conductivity

^c, 1.2 W/m/K; ||c, 1.6 W/m/K

Transparency Range 189 - 3500 nm
Therm-Optic Coefficients

dno/dT = - 9.3 x 10-6/0C;dne/dT = -16.6 x 10-6/0C
NLO coefficients d11 = 5.8 x d36(KDP)
d31 = 0.05 x d11, d22< 0.05 x d11
Electro-Optic Coefficients g11 = 2.7 pm/V, g22, g31< 0.1 g11 
Half-Wave Voltage 48 KV (at 1064 nm)
Phase-matchable SHG range 189-1750nm

Damage Threshold
@1.064 mm
 5 GW/cm2 (10 ns); 10 GW/cm2 (1.3 ns)
@0.532 mm
 1 GW/cm2 (10 ns); 7 GW/cm2 (250 ps)
@0.266 mm
 120 MW/cm2 (8ns)
Sellmeier Equations(l in mm) no2(l) = 2.7359+0.01878/(l2-0.01822)-0.01354 l 2
ne2(l) = 2.3753+0.01224/(l2-0.01667)-0.01516 l 2
 
Standard Parameter for Different Application
 
 1) Harmonic generations of Nd:YAG lasers:
 
1064nm SHG-> 532nm:                       Type I, Theta=22.8deg, Phi=0deg
 
1064nm THG-> 355nm:                       Type I, Theta=31.3deg, Phi=0deg
                                                         Type II, Theta=38.6deg, Phi=30deg
 
1064nm 4HG-> 266nm:                       Type I, Theta=47.6deg, Phi=0deg
 
1064nm 5HG-> 213nm:                       Type I, Theta=51.1deg, Phi=0deg
 
2) OPO and OPA pumped by harmonics of Nd:YAG lasers
 
532nm Pump-> 680-2600nm:              Type I, Theta=21deg, Phi=0deg
 
355nm Pump-> 410-2600nm:              Type I, Theta=30deg, Phi=0deg
                                                        Type II, Theta=37deg, Phi=30deg
 
266nm Pump-> 295-2600nm:              Type I, Theta=39deg, Phi=0deg
 
3) Frequency doubling of dye lasers
 
670-530nm SHG-> 355-260nm: Type I, Theta=40deg, Phi=0deg
 
600-440nm SHG-> 300-220nm: Type I, Theta=55deg, Phi=0deg
 
444-410nm SHG-> 222-205nm: Type I, Theta=80deg, Phi=0deg
 
4) Harmonic generations of Ti:Sapphire lasers
 
700-1000nm SHG-> 350-500nm:                     Type I, Theta=28deg, Phi=0deg
 
700-1000nm THG->240-330nm:                      Type I, Theta=42deg, Phi=0deg
 
700-1000nm FHG-> 210-240nm:                     Type I, Theta=28deg, Phi=0deg
 
5) Frequency doubling and tripling of Alexandrite lasers.
 
720-800nm SHG-> 360-400nm:                     Type I, Theta=31deg, Phi=0deg
 
720-800nm THG-> 240-265nm:                      Type I, Theta=48deg, Phi=0deg
 
6) Intracavity SHG of Ar+ laser with Brewster angle cut BBO
 
514nm SHG-> 257nm:                                      Type I, Theta=51deg, Phi=0deg
 
488nm SHG-> 244nm:                                      Type I, Theta=55deg, Phi=0deg
 
Standard Product Series
 
Part No.
Size(mm)
θ
Φ
Coating
Type
Unit Price
BBO101
4x4x7
22.8°
0°
AR/AR@1064&532nm
I
$408
BBO102
4x4x7
47.6°
0°
AR/AR@532&266nm
I
$408
BBO103
4x4x10
22.8°
0°
AR/AR@1064&532nm
I
$518
BBO104
4x4x10
47.6°
0°
AR/AR@532&266nm
I
$518
BBO105
5x5x2
29.2°
0°
AR/AR@800&400nm
I
$338
BBO106
5x5x1
29.2°
0°
AR/AR@800&400nm
I
$368
BBO107
5x5x0.3-0.5
29.2°
0°
AR/AR@800&400nm
I
$398
BBO108
5x5x0.1
29.2°
0°
AR/AR@800&400nm
I
$450