Cerium Doped Barium Titanate (Ce:BaTiO3)

Cerium Doped Barium Titanate (Ce:BaTiO3) is an excellent crystal with superior photorefractive properties, compared with other common-used Photo-refractive materials. The formation of a Self Pumped Phase Conjugate ( SPPC ) wave is based on the backward stimulated photorefractive scattering in the air without any external seed beam. So, the reflectivity of the SPPC wave is highly insensitive to the incident angle and inclination, which makes it easily to obtain the SPPC wave. As a SPPC mirror, the photorefractive performance of a 0°cut Ce:BaTiO3 is better than the 45°cut one.

Notes:

· Main temperature must be from 13℃ to 120℃ in order to prevent phase change.

· One face polished is for SPPC mirror

· Two faces polished for two wave mixing.

· Six faces polished for SPPC.

Standard Size: 5x5x5mm, 5x5x2mm

Basic Properties:

Crystal Structure:

tetragonal 4mm

 13°C ( 55°F ) <T<132°C (270° F)

Density:

6.02g/cm2

Hardness:

Mohs 5

Transmission Range:

0.45-6.3um

Refractive Indices:

        515nm     633nm      800nm

no     2.4921     2.4160      2.3681

ne     2.4247     2.3630      2.3235

Electro Optic Coefficients:

rT13=11.7±1.0pm/v,

rT33=112±10pm/v,

rT42=1920±180pm/v

Photorefractive Properties:

Reflectivity of SPPC ( 0°-cut):

50-70%(max.77%) for λ=515nm

50-80%(max.86.8%) for λ=633nm

Two-wave mixing coupling constant:

10-40cm-1

Absorption loss:

λ(nm)         515        633        800

α(cm-1)       3.392     0.268     0.005

 Note: Pure and Rh doped BaTiO3are also available

Other Photorefractive Crystals: Bi12SiO20(BSO),Bi12GeO20(BGO),Bi4TiO20(BTO),Bi4Ge3O12(BGO)and other photoreftrctive crystals are also available. 　
 
 
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