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    D-48149 Münster
Optical and spectral properties
Transmission range
189 ‐ 3500
Refractive index @532 nm
ne = 1,4525

no = 1,6749

Refractive index @ 1064 nm
ne = 1,5425

no = 1,6551

NLO coefficients in pm/V, @1064 nm
d22 = 2,2

d15 = d31 = 0,08

Absorption loss in %/cm @1064 nm
<0,1
Temperature acceptance in °C·cm
24 (Typ I, 1064 nm SHG)
Angular acceptance in mrad·cm
1,2 (Typ I, 1064 nm SHG)
Walk-off-angle
55,9 mrad (Typ I, 1064 nm SHG)
Physical properties
Chemical formula
β-BaB2O4
Density in g/cm3
3,85
Melting point in °C
≈1095
Lattice constants in Å
a= 12,532

b = 12,532

c = 12,717

Crystal structure
trigonal
Thermal conductivity in W/(m·K)
1,2 (⊥ c-Achse)

1,6 (∥ c-Achse)

Thermal expansion in 1/K
α11 = 4 ·10-6

α33 = 36·10-6

Mohs hardness
4,5
Specific heat capacity in J/(kg · °C)
490
Spectral properties
sample thickness: 10 mm