BBO
Physical Properties
- Crystal Structure trigonal, space group R3c
- Cell Parameters a = b = 12.532Ä, c = 12.717Ä, Z = 6
- Melting Point 1095 +/-5°C
- Transition Temperature 925 +/-5°C
- Optical Homogeneity Dn ≈10-6/cm
- Hardness 4.5 Mohs
- Density 3.85 g/cm3
- Absorption Coefficient < 0.1%/cm (at 1064 nm)
- Hygroscopic Susceptibility low
- Resistivity > 1011 ohm-cm
- Relative Dielectric Constant eT11/e0: 6.7, eT33/e0: 8.1
- Tan d, < 0.001
- Thermal Expansion Coefficients(in the range of 25°C- 900°C) a, 4 x 10-6/K c, 36 x 10-6/K
- Thermal Conductivity ^c, 1.2 W/m/K; ||c, 1.6 W/m/K
Chemical Properties
- Phase-matchable SHG range 189-1750nm
- NLO coefficients d11 = 5.8 x d36(KDP)
- d11 = 0.05 x d11, d22< 0.05 x d11
- Electro-Optic Coefficients g11 = 2.7 pm/V, g22, g31< 0.1 g11
- Half-Wave Voltage 48 KV (at 1064 nm)
- Damage Threshold 5 GW/cm2 (10 ns)
- at 1.064 mm 10 GW/cm2 (1.3 ns)1 GW/cm2 (10 ns);
- at 0.532 mm 7 GW/cm2 (250 ps)
- Transparency Range 189 - 3500 nm
- Refractive Indices
- at 1.0642 mm ne = 1.5425, no = 1.6551
- at 0.5321 mm ne = 1.5555, no = 1.6749
- at 0.2660 mm ne = 1.6146, no = 1.7571
- Therm-Optic Coefficients
- dno/dT = - 9.3 x 10-6/°C
- dne/dT = -16.6 x 10-6/°C