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BBO β-Barium borate
β-BBO Nonlinear Crystal—a widely used nonlinear crystal for frequency conversion in the ultraviolet, visible
and near-infrared.
As one of the most important nonlinear optical crystals, beta-barium borate (β-BaB2O4 β-BBO) combines
many outstanding features such as its high nonlinear optical coefficients, low group-velocity dispersion, broad
transparency range (189–3500 nm) and high damage threshold. This unique combination ensures β-BBO crys-
tal a promising candidate for a wide range of nonlinear optical applications such as frequency converters and
optical parametric oscillators. In the realm of quantum optics, β-BBO crystal can be used to generate entangled
photon pairs and ten-photon entanglement.
BBO is a negative uniaxial crystal, which provides phase matching for various second-order interactions almost
over its entire transparency range (from 185 nm to 3.3 µm, as deduced from the transmittance measurements
using crystal samples of several mm thickness), making it a widely used crystal for nonlinear frequency conver-
sion in the ultraviolet, visible and near-infrared. In that regard, BBO is the most important nonlinear crystal for
near infrared optical parametric chirped pulse amplifiers, which currently deliver few optical cycle pulses with
high average and ultrahigh peak powers.
The range of transmission is from 190 nm to
3500nm
Appropriate mechanical properties
Large effective SHG coefficient
The range of phase matching is large from 409.6
nm to 3500nm
Optical homogeneity is high:δn≈10-6
/cm
Good physical properties
Electro-optic crystal for Pockels cells
266nm laser used in material processing
532nm laser used in medical area
OPO
www.laser-crylink.com
sales@laser-crylink.com
+86-21-69910952 / 69913696
No.200, Zhaoxian Road, Jiading District, Shanghai, China
PARAMETERS
Property Value
Chemical formula BaB2
O4
Crystal structure Trigonal, 3m
Lattice Parameter
3.85 g/cm3
Mass density
Moh hardness
a=b=12.532Å
c=12.717Å, Z=6
Melting point
4
About 1095°C
0.1mm@45°Chamfer
α,4×10-6
/K; c,36×10-6
/KThermal expansion coefficient
Birefringence Negative uniaxial
PHYSICAL AND CHEMICAL PROPERTIES
Thermal conductivity 1.2 W/m/K (⊥c)
1.6 W/m/K (//c)
BBO β-Barium borate
Property Value
SHG Phase Matchable Range
409.6~500nm (Type I);
525~3500nm (TypeII)
NLO coefficients
d11
= 5.8 x d36
(KDP)
d31
= 0.05 x d11
d22
< 0.05 x d11
deff
(I)=d31
sinθ+ (d11
cos3φ – d22
sin3φ)cosθ
deff
(II)=(d11
sin3φ+ d22
cos3θ)cos2θ
Therm-Optic Coefficients
5 GW/cm2
(10 ns); 10 GW/cm2
(1.3 ns)
1 GW/cm2
(10 ns); 7 GW/cm2
(250 ps)
Damage Threshold
at 1064nm
at 532nm
Transparency Range
dno
/dT = – 9.3 x 10-6
/℃
dne
/dT = -16.6 x 10-6
/℃
Absorption Coefficient
189 – 3500 nm
α<0.1%/cm @1064nm
NONLINEAR OPTICAL PROPERTIES
ne
= 1.5425, no
= 1.6551
ne
= 1.5555, no
= 1.6749
ne
= 1.6146, no
= 1.7571
RefractiveIndices
at 1064nm
at 532nm
at 266nm
www.laser-crylink.com
sales@laser-crylink.com
+86-21-69910952 / 69913696
No.200, Zhaoxian Road, Jiading District, Shanghai, China
EXPERIMENTAL VALUES OF INTERNAL ANGULAR
BANDWIDTHS AT T =293K
Interacting
wavelengths(nm)
θpm
[deg]
SHG, o+o → e
22.81064 → 532
Δθint
[deg]
0.021
47.3532 → 266 0.01
SFG, o+o → e
31.31064+532 → 354 0.01
21.82688+571 → 471 0.028
SHG, e+o → e
32.71064 → 532 0.034
SFG, e+o → e
38.41064+532 → 355 0.02
SFG, o+e → e
58.41064+532 → 355 0.05
EXPERIMENTAL VALUES OF PHASE-MATCHING ANGLE
(T =293K)
Interacting wavelengths[nm] θexp
[deg]
SHG, o+o → e
400 → 200 90
415 → 207 79.2
476 → 328 57
510 → 255 50
532 → 266 47.3
604 → 302 40
710 → 355 33
780 → 390 30
800 → 400 26.5
946 → 473 24.9
1064 → 532 22.7
SHG, e+o → e
532 → 266 81
710 → 355 48
1064 → 532 32.4
BBO β-Barium borate
SPECTRA
BBO Transmission Spectrum
SHG tuning curves of BBO
OPO tuning curves of BBO (TypeI (ooe))
with different pump light, namely
530 nm, 355 nm and 266 nm
OPO tuning curves of BBO (TypeII (eoe))
with different pump light, namely
530 nm, 355 nm and 266 nm
www.laser-crylink.com
sales@laser-crylink.com
+86-21-69910952 / 69913696
No.200, Zhaoxian Road, Jiading District, Shanghai, China

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Bbo nonlinear crystal datasheet

  • 1. FEATURES APPLICATIONS DESCRIPTION BBO β-Barium borate β-BBO Nonlinear Crystal—a widely used nonlinear crystal for frequency conversion in the ultraviolet, visible and near-infrared. As one of the most important nonlinear optical crystals, beta-barium borate (β-BaB2O4 β-BBO) combines many outstanding features such as its high nonlinear optical coefficients, low group-velocity dispersion, broad transparency range (189–3500 nm) and high damage threshold. This unique combination ensures β-BBO crys- tal a promising candidate for a wide range of nonlinear optical applications such as frequency converters and optical parametric oscillators. In the realm of quantum optics, β-BBO crystal can be used to generate entangled photon pairs and ten-photon entanglement. BBO is a negative uniaxial crystal, which provides phase matching for various second-order interactions almost over its entire transparency range (from 185 nm to 3.3 µm, as deduced from the transmittance measurements using crystal samples of several mm thickness), making it a widely used crystal for nonlinear frequency conver- sion in the ultraviolet, visible and near-infrared. In that regard, BBO is the most important nonlinear crystal for near infrared optical parametric chirped pulse amplifiers, which currently deliver few optical cycle pulses with high average and ultrahigh peak powers. The range of transmission is from 190 nm to 3500nm Appropriate mechanical properties Large effective SHG coefficient The range of phase matching is large from 409.6 nm to 3500nm Optical homogeneity is high:δn≈10-6 /cm Good physical properties Electro-optic crystal for Pockels cells 266nm laser used in material processing 532nm laser used in medical area OPO www.laser-crylink.com sales@laser-crylink.com +86-21-69910952 / 69913696 No.200, Zhaoxian Road, Jiading District, Shanghai, China
  • 2. PARAMETERS Property Value Chemical formula BaB2 O4 Crystal structure Trigonal, 3m Lattice Parameter 3.85 g/cm3 Mass density Moh hardness a=b=12.532Å c=12.717Å, Z=6 Melting point 4 About 1095°C 0.1mm@45°Chamfer α,4×10-6 /K; c,36×10-6 /KThermal expansion coefficient Birefringence Negative uniaxial PHYSICAL AND CHEMICAL PROPERTIES Thermal conductivity 1.2 W/m/K (⊥c) 1.6 W/m/K (//c) BBO β-Barium borate Property Value SHG Phase Matchable Range 409.6~500nm (Type I); 525~3500nm (TypeII) NLO coefficients d11 = 5.8 x d36 (KDP) d31 = 0.05 x d11 d22 < 0.05 x d11 deff (I)=d31 sinθ+ (d11 cos3φ – d22 sin3φ)cosθ deff (II)=(d11 sin3φ+ d22 cos3θ)cos2θ Therm-Optic Coefficients 5 GW/cm2 (10 ns); 10 GW/cm2 (1.3 ns) 1 GW/cm2 (10 ns); 7 GW/cm2 (250 ps) Damage Threshold at 1064nm at 532nm Transparency Range dno /dT = – 9.3 x 10-6 /℃ dne /dT = -16.6 x 10-6 /℃ Absorption Coefficient 189 – 3500 nm α<0.1%/cm @1064nm NONLINEAR OPTICAL PROPERTIES ne = 1.5425, no = 1.6551 ne = 1.5555, no = 1.6749 ne = 1.6146, no = 1.7571 RefractiveIndices at 1064nm at 532nm at 266nm www.laser-crylink.com sales@laser-crylink.com +86-21-69910952 / 69913696 No.200, Zhaoxian Road, Jiading District, Shanghai, China EXPERIMENTAL VALUES OF INTERNAL ANGULAR BANDWIDTHS AT T =293K Interacting wavelengths(nm) θpm [deg] SHG, o+o → e 22.81064 → 532 Δθint [deg] 0.021 47.3532 → 266 0.01 SFG, o+o → e 31.31064+532 → 354 0.01 21.82688+571 → 471 0.028 SHG, e+o → e 32.71064 → 532 0.034 SFG, e+o → e 38.41064+532 → 355 0.02 SFG, o+e → e 58.41064+532 → 355 0.05 EXPERIMENTAL VALUES OF PHASE-MATCHING ANGLE (T =293K) Interacting wavelengths[nm] θexp [deg] SHG, o+o → e 400 → 200 90 415 → 207 79.2 476 → 328 57 510 → 255 50 532 → 266 47.3 604 → 302 40 710 → 355 33 780 → 390 30 800 → 400 26.5 946 → 473 24.9 1064 → 532 22.7 SHG, e+o → e 532 → 266 81 710 → 355 48 1064 → 532 32.4
  • 3. BBO β-Barium borate SPECTRA BBO Transmission Spectrum SHG tuning curves of BBO OPO tuning curves of BBO (TypeI (ooe)) with different pump light, namely 530 nm, 355 nm and 266 nm OPO tuning curves of BBO (TypeII (eoe)) with different pump light, namely 530 nm, 355 nm and 266 nm www.laser-crylink.com sales@laser-crylink.com +86-21-69910952 / 69913696 No.200, Zhaoxian Road, Jiading District, Shanghai, China