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Basic Properties of alpha-BBO Crystal

Transparency Range: 189 - 3500 nm

material-abbo.GIF (11478 bytes)

Transmission Curve

Crystal Symmetry: Hexagonal R3c

Lattice Symmetry: a=b=7.2351A,c=39.192A

Density: 3.85 g/cm3
Thermo-Optic Coefficients:
dno/dT= - 9.3 x 10-6 /oC
dne/dT= - 1 6 .6 x 10-6/oC
Damage Threshold (10ns, 10Hz)
at 1064 nm 1GW/cm2
at 532 nm 500 MW/cm2
Optical Homogeneity: Δn < 10-6/cm
Mohs Hardness: 4.5
Thermal Expansion Coefficients
(in the range of 25–900oC)
αa = 4 x 10-6/K
αc = 36 x 10-6/K
Linear Absorption Coefficients: α<0.005cm-1 from 300 to 2300 nm

Sellmeier Equations (λ in m) :

no2=2.67579+0.02099/(λ2-0.00470)-0.00528λ2
ne2=2.31197+0.01184/(λ2-0.01607)-0.00400λ2
 

 Wavelength(nm) no ne Birefringence
(Δn=ne -no)
Walk-off Angle
 at 45
1550 1.6346 1.5190 -0.116 4.19
1064 1.6396 1.5225 -0.117 4.23
800 1.6448 1.5259 -0.119 4.28
775 1.6456 1.5264 -0.120 4.29
632.8 1.6513 1.5301 -0.121 4.35
532 1.6582 1.5347 -0.124 4.42
400 1.6763 1.5471 -0.129 4.58
355 1.6876 1.5554 -0.132 4.66
266 1.7301 1.5900 -0.140 4.81


 

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