cur5
BBO


BBO (Beta-Barium Borate or β-BaB2O4) is an excellent nonlinear crystal for frequency-doubling of Visible and Near IR laser light, OPO/OPG/OPA pumped by ultrafast pulses of wavelengths in the Near IR to UV, and sum-frequency mixing (SFM) into the Visible to the deep UV. BBO is one of the few practical crystals for use below 500 nm in SHG and SFM.


Advantages

● Broad phase-matchable range from 409.6 nm to 3500nm

● Wide transmission region from 190 nm to 3500nm

● Large effective SHG coefficient

● High damage threshold

● High optical homogeneity with δn≈10-6/cm

● Wide temperature-bandwidth of about 55℃




Standard BBO

Dimension(mm)

θ(Deg)

φ(Deg)

Coating

Application

4*4*7

22.8

0

AR/AR@1064&532nm

SHG@1064, TypeⅠ

4*4*7

47.6

0

AR/AR@532&266nm

FHG@1064,TypeⅠ

4*4*10

22.8

0

AR/AR@1064&532nm

SHG@1064, TypeⅠ

4*4*10

47.6

0

AR/AR@532&266nm

FHG@1064, TypeⅠ

5*5*1

29.2

0

AR/AR@800&400nm

SHG@800, TypeⅠ

5*5*0.3-0.5

29.2

0

AR/AR@800&400nm

SHG@800, TypeⅠ

Specifications

Material

BBO

Match Type

type I or type II

Dimension

W×H:1×1-15×15mm, L: 0.05-20mm

Dimension Tolerance

W(±0.1) x (H(±0.1) x L(+0.2/-0.1)mm

Angle Tolerance

Δθ< 0.2°,  Δφ< 0.2°

Flatness

λ/8 @ 633nm

Wavefront Distortion

< λ/8 @ 633nm

Scratch/Dig

20/10@MIL-0-13830A

Parallelism

< 30 arc seconds

Perpendicularity

< 10 arc minutes

Clear Aperture

>90%

Chamfer

0.15mmx 45°

AR Coating

AR@ 1064nm R < 0.2% & 532nm R < 0.5%

Damage Threshold

500 MW/cm2@1064nm 10ns 10Hz

Properties

Crystal Structure

trigonal, space group R3c

Cell Parameters

a=b=12.532Å, c =12.717Å, Z=6

Melting point 

1095°C

Mohs hardness

4.5

Density

3.85 g/cm3

Hygroscopic Susceptibility

low

Thermal Conductivity

⊥c: 1.2 W/m/K, ║c: 1.6 W/m/K

Thermal Expansion Coefficients

α11= 4 x 10-6 /K, α33= 36 x 10-6 /K

Resistivity (ohm • cm)

> 1011  ohm-cm

Relative Dielectric Constant

εs11/ε0= 6.7

εs33/ε0= 8.1

Tan δ<0.001

Transparency Range

190-3500 nm

Phase Matching SHG Range

205nm-1750nm

Electro-optic coefficients

r22=2.7pm/V

therm-optic Coefficients(/℃)

dno/dT=-16.6x10-6

dne/dT=-9.3x10-6