PHOSCTECH offers high grade flux-method BBO crystals with good homogeneity, low defects and low absorption.
PHOSCTECH’s BBO Crystals Feature:
·Broad phase-matchable second-harmonic-generation(SHG) range from 409.6nm to 3500nm
·Wide transmission region from 190nm to 3500nm
·Large effective SHG coefficient
·High damage threshold of 10 m W/ cm2 for 100 ps pulse-width at 1064nm
·High optical homogeneity with Dn 10-6 / cm2
·Wide temperature bandwidth of about 55℃ (for type I SHG 1064nm)
·Good mechanical and physical properties.
PHOSCTECH’s BBO Crystals Have Been Applied to:
·Second, third, fourth and fifth harmonic generations of Nd: lasers
· Frequency-doubling, -tripling and -mixing of dye lasers
· Second, third and fourth harmonic generations of Ti: Al2O3 and Alexandrite lasers
· Optical parametric amplifiers (OPA) and optical parametric oscillators (OPO)
· Frequency-doubling and -tripling of ultra short pulse Ti: Sapphire and dye lasers
· Frequency-doubling of Argon ions, Cu-vapor and ruby lasers
· External intra-cavity SHG
Capability:
Attribute
|
Commercial
|
High Precision
|
Dimensions
|
L=0.3mm to 25mm
Size: Up to 15x15x15 mm3
|
Wavefront Distortion
|
λ/8
|
λ/8
|
Orientation
|
±0.5°
|
±0.2°
|
End-faces Configuration
|
Flat
|
Dimension Tolerance
|
±0.1mm
|
±0.01mm
|
Surface Quality
|
20-10 scratch and dig
|
10-5 scratch and dig
|
Flatness
|
λ/8
|
λ/8
|
Parallelism
|
20"
|
10"
|
Perpendicularity
|
15'
|
5'
|
Note:Protective coating is strongly recommended due to high hygroscopic susceptibility of BBO crystals.
Basic Properties:
1.Structural and Physical Properties
Chemical formula |
β-BaB2O4 |
Crystal Structure |
trigonal , space group R3c |
Cell Parameters |
a=b=12.532Ă,c=12.717 ?,Z=6 |
Melting Point |
1095±5℃ |
Transition Temperature |
925±5℃ |
Optical Homogeneity |
Δn≈10-6/cm |
Mohs Hardness |
4.5 |
Density |
3.85g/cm3 |
Linear Absorption Coefficients |
α<0.001cm-1 (λ=1064nm)
α<0.01cm-1 (λ=532nm)
α<0.5cm-1 (λ=255nm) |
Hygroscopic Susceptibility |
Low |
Resistivity |
>1011ohm-cm |
Relative Dielectric Constant |
εT11/εo:6.7, εT33/εo:8.1,Tan δ,<0.001 |
Thermal Expansion Coefficients(in the range of 25℃-900℃)Thermal Conductivity |
a, 4×10-6/K
c, 36×10-6/K
┴ c , 1.2w/m/k; ║ c, 1.6 w/m/k |
2.Linear Optical properties
Transparency Range: 189-3500nm,See Transparency Curve |
Refractive Indices: |
at 1.0642 μm ne=1.5425, no=1.6551 |
at 0.5321 μm ne=1.5555, no=1.6749 |
at 0.2660 μm ne=1.6146, no=1.7571 |
Therm-Optic Coefficients: |
dno/dT=-9.3×10-6/℃ dne/dT=-16.6×10-6/℃ |
Sellmeier Equations: |
N2o(λ)=2.7359+0.01878/(λ2-0.01822)-0.01354×λ2 (λ in μm, T=20℃) |
N2e(λ)=2.3753+0.01224/(λ2-0.01667)-0.01516×λ2 (λ in μm, T=20℃) |
3.NonLinear Optical Properties
Phase-Matchable Output Range: 189-1750nm
NLO Coefficients: d11=5.8×d36(KDP)
Electro-optic Coefficients: d31=0.05×d11, d22<0.05×d11
γ11=2.7pm/V, γ22 , γ31<0.1γ11
Half-Wave Voltage: 48KV(at 1064nm)
Damage Threshold:
at 1.064 μm 5GW/cm2(10ns); 10GW/ cm2(1.3ns);
at 0.532 μm 1GW/ cm2(10ns); 7GW/ cm2(250ps);
at 0.266 μm 12MW/cm2(8ns).