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Substrate Specifications
Crystal Grade: Single Crystal with domain (poled ), substrate grade A for thin film ( not a Photo-Refractive grade), please click here to learn three grades of BTO crystal .
Size: 5 x5 x0.5 mm +/- 0.05 mm
Polished: One side epi polished by CMP
Roughness:
Orientation: +/- 0.5 o
Packing: 1000 class clean room in vacuum bag
Shipping: in a thermal box with battery pack to keep substrate > 10oC
Typical Properties of BaTiO3 single crystal
Crystal Structure
Tetragonal ( 4m) : 9oC oC
a=3.99 ?, c= 4.04 ? ,
Growth Method
Top Seeded Solution Growth
Melting Point
1600 oC
Density
6.02 g/cm3
Dielectric constants
ea = 3700, ec = 135 (unclamped)
ea = 2400, e c = 60 (clamped)
Index of Refraction
515 nm 633 nm 800 nm
no 2.4921 2.4160 2.3681
ne 2.4247 2.3630 2.3235
Transmission wavelength
0.45 ~ 6.30 mm
Electro Optic Coefficients:
rT 13 = 11.7 ?1.9 pm/V rT 33 =112 ?10 pm/V
rT 42= 1920 ?180 pm/V
Reflectivity of SPPC
( at 0 deg. cut )
50 - 70 % ( max. 77% ) for l = 515 nm
50 - 80 % ( max: 86.8%) for l = 633 nm
Two-wave mixing coupling constant:
10 -40 cm-1
Absorption loss:
l: 515 nm 633 nm 800 nm
a: 3.392cm-1 0.268cm-1 0.005cm-1
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