GGG, GSGG from Russia

GGG, GSGG

Ca,Mg, Zr:GGG; GSGG
GADOLINIUM GALLIUM GARNET,
GADOLINIUM SCANDIUM GALLIUM GARNET

APPLICATION - POLISHED SUBSTRATES FOR OPTICAL MODULATORS, OPTICAL ISOLATORS, MAGNETO-OPTICAL DEVICES

CRYSTAL STRUCTURE CUBIC
SPACE GROUP Ia3d-0¹⁰_h(No.230)

CHEMICAL
FORMULA
Gd_3-xCa_xGa_5-x,2yMg_yZr_x+y O₁₂ Gd₃Sc_xGa_5-xO₁₂

DENSITY
g/cm³       6.72 6.48

MELTING
POINT, K     1965 2120

DIELECTRIC
CONSTANT 10 10

LATTICE            _o
PARAMETER, A 12.493+/-0.002 12.563+/-0.002

LINEAR
EXPANSION
COEFFICIENT 7x10^-6/ ^o C 6.5x10^-6/ ^o C

REFRACTIVE
INDEX
AT 26.0^o+/-0.4 (Y=0)

                  _o
6438.47 A 1.94941 1.96276

                   _o
10640.00A 1.93894 1.94203

THERMO-
CONDUCTIVITY,
Wm^-1K^-1 5.03 6.4

THERMO-
OPTICAL
COEFFICIENT
AT 1.152 MICRON²         12.45 x10^-6/ ^o C     9.04 x10^-6/ ^o C

COLOR                                                                    COLORLESS
DIAMETER                                                             76+/-0.25 mm
THICKNESS,                                                          500+/-20 MICRON
         SURFACE ORIENTATION             [100] OR [111] + /-15' OR ANY OTHER   PRIMARY FLAT ORIENTATION                      (110)+/- 2^o

DEFECT DENSITY                                                0 - 10 CM^-2
SECONDARY FLAT ORIENTATION               (112) 90+/-5^o FROM      PRIMARY FLAT
FLATNESS       -     LESS THEN 5    MICRON   OVER 80% 0F THE CENTRAL AREA

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