BBO (BBO-Y-447-C2)

BBO (BBO-Y-447-C2)

Supplier
Crystech
Part Number
BBO-Y-447-C2
Category
Crystallography
Origin
China

Because of a small acceptance angle and large walk-off, good laser beam quality (small divergence, good mode condition, etc.) is the key for BBO to obtain high conversion efficiency. Tight focus of laser beam is not recommended. BBO is the only NLO material which can be used to produce the fifth harmonic generation (5HG) of Nd:YAG lasers at 213 nm. BBO is a negative uniaxial crystal with ordinary refractive-index(no) larger than extraordinary refractive-index(ne). Both type I and type II phase-matching can be reached by angle-tuning. The phase matching angles of frequency doubling are shown in following figure. Frequency-doubling and -tripling of ultrashort-pulse lasers are the applications in which BBO shows superior properties. As thin as 0.02mm BBO for this purpose is available.. A laser pulse as short as 10 fs can be efficiently frequency-doubled with a thin BBO, in terms of both phase-velocity and group-velocity matching. The OPO and OPA of BBO are powerful tools for generating a widely tunable coherent radiation from the UV to IR. The tuning angles of type I and type II BBO OPO and OPA are shown in following figure, respectively. BBO can also be used for E-O applications. It has wide transmission range from UV to about 3500nm and it has much higher damage threshold than KD*P and LiNbO3. It has many advantages, including a very short pulse, good beam quality and compact size. Although it has a relative small electro-optic coefficient, the Half-wave voltage is high (7KV at 1064nm,3*3*20mm3), long and thin BBO can reduce the voltage requirements. CRYSTECH can supply 25mm long high quality BBO crystal with Z-cut, AR-coated and Gold plated on the side faces.

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Overview

Because of a small acceptance angle and large walk-off, good laser beam quality (small divergence, good mode condition, etc.) is the key for BBO to obtain high conversion efficiency. Tight focus of laser beam is not recommended. BBO is the only NLO material which can be used to produce the fifth harmonic generation (5HG) of Nd:YAG lasers at 213 nm. BBO is a negative uniaxial crystal with ordinary refractive-index(no) larger than extraordinary refractive-index(ne). Both type I and type II phase-matching can be reached by angle-tuning. The phase matching angles of frequency doubling are shown in following figure. Frequency-doubling and -tripling of ultrashort-pulse lasers are the applications in which BBO shows superior properties. As thin as 0.02mm BBO for this purpose is available.. A laser pulse as short as 10 fs can be efficiently frequency-doubled with a thin BBO, in terms of both phase-velocity and group-velocity matching. The OPO and OPA of BBO are powerful tools for generating a widely tunable coherent radiation from the UV to IR. The tuning angles of type I and type II BBO OPO and OPA are shown in following figure, respectively. BBO can also be used for E-O applications. It has wide transmission range from UV to about 3500nm and it has much higher damage threshold than KD*P and LiNbO3. It has many advantages, including a very short pulse, good beam quality and compact size. Although it has a relative small electro-optic coefficient, the Half-wave voltage is high (7KV at 1064nm,3*3*20mm3), long and thin BBO can reduce the voltage requirements. CRYSTECH can supply 25mm long high quality BBO crystal with Z-cut, AR-coated and Gold plated on the side faces.

Specifications

ParameterValue
Dimension ToleranceW(+/-0.1)*H(+/-0.1)*L(+0.5/-0.1)mm
Angle Tolerance+/-0.25°
Perpendicularity≤ 10’
Scratch/Dig20/10
Chamfer [45°]≤ 0.2mm x 45°
Parallelism≤10″
Chips≤ 0.1mm
Flatness (λ) [633nm]λ/10@633nm
Clear Aperture≥ 90%
Wavefront distortion (λ) [633nm]λ/8@633nm
Damage Threshold [1064nm; 10ns; 10Hz]1GW/cm² (1064nm, 10ns, 10Hz)
Cut AngleΘ=31.3°φ=0°
Size4 mm × 4 mm × 7 mm
Coating [1064&532&355nm]AR/AR@1064&532&355nm
Effective NLO Coefficient (d36(KDP)) [type I; 1064nm; SHG; d36(KDP)]5.3
Effective NLO Coefficient (d36(KDP)) [type I; 1064nm; THG; d36(KDP)]4.9
Effective NLO Coefficient (d36(KDP)) [type I; 1064nm; FHG; d36(KDP)]3.8
Effective NLO Coefficient (d36(KDP)) [type I; 1064nm; 5HG; d36(KDP)]3.4
Acceptance Angle [type I; 1064nm; SHG]1.0 mrad·cm
Acceptance Angle [type I; 1064nm; THG]0.5 mrad·cm
Acceptance Angle [type I; 1064nm; FHG]0.3 mrad·cm
Acceptance Angle [type I; 1064nm; 5HG]0.2 mrad·cm
Walk-off Angle [type I; 1064nm; SHG]3.2 °
Walk-off Angle [type I; 1064nm; THG]4.1 °
Walk-off Angle [type I; 1064nm; FHG]4.9 °
Walk-off Angle [type I; 1064nm; 5HG]5.5 °
Crystal StructureTrigonal, space group R3c
Lattics Parametersa=b=12.532Å, c=12.717Å, Z=6
Melting pointAbout 1095℃
Mohs Hardness4
Density3.85g/cm3
Thermal Conductivity [┴c]1.2W/m/K(┴c)
Thermal Conductivity [//c]1.6W/m/K(//c)
Thermal Expansion Coefficients11=4x10-6/K; 33=36x10-6/K
Transparency Range190-3500nm
SHG Phase Matchable Range [Type I]409.6-3500nm(Type I)
SHG Phase Matchable Range [Type II]525-3500nm(Type II)
therm-optic Coefficients (dno/dT)dno/dT=-16.6x10-6
therm-optic Coefficients (dne/dT)dne/dT=-9.3x10-6
Absorption Coefficients [1064nm]<0.1%/cm at 1064nm
Absorption Coefficients [532nm]<1%/cm at 532nm
Angle Acceptance (θ) [θ, Type I,1064 SHG]0.8mrad-cm (θ, Type I,1064 SHG)
Angle Acceptance (θ) [θ, Type II,1064 SHG]1.27mrad-cm (θ, Type II,1064 SHG)
Temperature Acceptance55℃-cm
Spectral Acceptance1.1nm-cm
Walk-off Angle [Type I 1064 SHG]2.7° (Type I 1064 SHG)
Walk-off Angle [Type II 1064 SHG]3.2° (Type II 1064 SHG)
NLO Coefficients (deff (I)) [Type I]deff (I)=d31sinθ+(d11cosΦ-d22sin3Φ)cosθ
NLO Coefficients (deff (II)) [Type II]deff (II)=(d11sin3Φ+d22cos3Φ)cos2θ
Non-vanished NLO susceptibilities (d11)d11=5.8xd36(KDP)
Non-vanished NLO susceptibilities (d31)d31=0.05xd11
Non-vanished NLO susceptibilities (d22)d22<0.05xd11
sellmeier Equations(λ in μm )no2=2.7359+0.01878 / (λ2-0.01822) -0.01354 λ2
sellmeier Equations(λ in μm )ne2=2.3753+0.01224 / (λ2-0.01667) -0.01516 λ2
Electro-optic coefficients (r22)r22=2.7pm/V
Half-wave voltage [at 1064nm; 3*3*20mm3]7KV (at 1064nm,3*3*20mm3)
Resistivity>1011 ohm-cm
Relative Dielectric Constant (εs11/εo)εs11/εo:6.7
Relative Dielectric Constant (εs33/εo)εs33/εo:8.1
Relative Dielectric Constant-Tan δTan δ<0.001

Applications

SHG, THG, 4HG, 5HG of Nd lasers;SHG, THG, 4HG of Ti:Al2O3 and Alexandrite lasers;SHG, THG and Frequency-mixing of Dye lasers;SHG of Argon ion, Cu-vapor and Ruby lasers;OPA and OPO;Electro-Optical application (Pockels Cell);SHG and SFG

Key Features

Wide transmission region;Broad PM SHG range;Large effective SHG coefficient;High damage threshold;Wide temperature-bandwidth;High optical homogeneity

Datasheet

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Supplier Information

Cr
Crystech
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CRYSTECH Inc. was established in the beautiful coastal city of Qingdao in 2001. We take "serving the progress of laser technology and promoting the development of laser industry" as our mission, and engage in the Research and Development, Production, and Sales of laser crystals, Q-switches, Nonlinear optical crystals, Laser optical components, and related laser devices. It has now become a world’s leading manufacturer of core components for solid-state lasers. Our products are widely used in various fields such as medical and aesthetics lasers. CRYSTECH has modern offices and production plants with a total area of more than 8000 square meters. We passed ISO9001 Quality Management System certification in 2006. The Quality Management System has been implemented in all departments from R&D to production, from pre-sales to after-sales, covering the whole processes from company management to customer satisfaction. As a world-renowned laser components manufacturer, we provide one-stop solutions for core components of solid-state lasers. CRYSTECH’s main products cover eight categories: Laser crystals, Q- switches, Nonlinear crystals, 1535nm bonding crystals, Laser optical components, Laser modules, Laser cavities, and Laser handpieces. Among them, the most representative products include Alexandrite rods, Nd:YAG rods, RTP Q-Switch, KD*P Pockels Cells, KTP crystals, 1535nm bonding crystals, Cell Mirrors, Polarizers, 755nm long pulse laser module, Ceramic reflector and Dye Handpiece, etc. CRYSTECH supports and serves customers, and creates value for them. We are willing to develop and progress together with our customers.

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