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BBO Crystals

  • Versatile applications: SHG, THG,4HG,5HG, OPO, OPA, OPG, SFG/DFG, SPDC, EO Modulations
  • Large-size BBO crystals available, with a maximum aperture of  20x20mm
  • Broad phase-matching range from 409.6nm to 3500nm
  • Exceptional SHG coefficient and high damage threshold
  • Ultra-thin Crystals for Femto-line Lasers: minimum thicknesses: 0.01mm (with FS substrate), 0.05mm (Free-standing)
  • Coating options: P-coating/ multi-layer V-coating/ single, dual-wavelength AR coating
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Code Size Thickness θ φ Coating Application Unit Price Delivery Cart
20201-001 6x6mm 0.01mm 23.4° 90° P/P SHG@1030nm Type1 $380 3 weeks
20201-002 6x6mm 0.02mm 23.4° 90° P/P SHG@1030nm Type1 $380 3 weeks
20201-003 6x6mm 0.05mm 23.4° 90° P/P SHG@1030nm Type1 $380 2 weeks
20201-004 6x6mm 0.1mm 23.4° 90° P/P SHG@1030nm Type1 $380 2 weeks
20201-005 6x6mm 0.5mm 23.4° 90° P/P SHG@1030nm Type1 $245 2 weeks
20201-006 6x6mm 1.0mm 23.4° 90° P/P SHG@1030nm Type1 $245 2 weeks
20201-007 6x6mm 1.5mm 23.4° 90° P/P SHG@1030nm Type1 $245 2 weeks
20201-008 6x6mm 2.0mm 23.4° 90° P/P SHG@1030nm Type1 $245 2 weeks
20201-009 6x6mm 0.01mm 29.2° 90° P/P SHG@800nm Type1 $380 3 weeks
20201-010 6x6mm 0.02mm 29.2° 90° P/P SHG@800nm Type1 $380 3 weeks
20201-011 6x6mm 0.05mm 29.2° 90° P/P SHG@800nm Type1 $380 2 weeks
20201-012 6x6mm 0.1mm 29.2° 90° P/P SHG@800nm Type1 $305 2 weeks
20201-013 6x6mm 0.2mm 29.2° 90° P/P SHG@800nm Type1 $245 2 weeks
20201-014 6x6mm 0.5mm 29.2° 90° P/P SHG@800nm Type1 $245 2 weeks
20201-015 6x6mm 1.0mm 29.2° 90° P/P SHG@800nm Type1 $245 2 weeks
20201-016 6x6mm 2.0mm 29.2° 90° P/P SHG@800nm Type1 $245 2 weeks
20201-017 10x10mm 0.02mm 29.2° 90° P/P SHG@800nm Type1 $605 3 weeks
20201-018 10x10mm 0.05mm 29.2° 90° P/P SHG@800nm Type1 $605 2 weeks
20201-019 10x10mm 0.1mm 29.2° 90° P/P SHG@800nm Type1 $530 2 weeks
20201-020 10x10mm 0.2mm 29.2° 90° P/P SHG@800nm Type1 $455 2 weeks
20201-021 10x10mm 0.5mm 29.2° 90° P/P SHG@800nm Type1 $455 2 weeks
20201-022 10x10mm 1.0mm 29.2° 90° P/P SHG@800nm Type1 $455 2 weeks
20201-023 10x10mm 1.5mm 29.2° 90° P/P SHG@800nm Type1 $455 2 weeks
20201-024 10x10mm 2.0mm 29.2° 90° P/P SHG@800nm Type1 $455 2 weeks
20201-025 6x6mm 0.01mm 44.3° 90° P/P THG@800nm Type1 $380 3 weeks
20201-026 6x6mm 0.02mm 44.3° 90° P/P THG@800nm Type1 $380 3 weeks
20201-027 6x6mm 0.05mm 44.3° 90° P/P THG@800nm Type1 $380 2 weeks
20201-028 6x6mm 0.1mm 44.3° 90° P/P THG@800nm Type1 $305 2 weeks
20201-029 6x6mm 0.2mm 44.3° 90° P/P THG@800nm Type1 $245 2 weeks
20201-030 6x6mm 0.5mm 44.3° 90° P/P THG@800nm Type1 $245 2 weeks
20201-031 6x6mm 1.0mm 44.3° 90° P/P THG@800nm Type1 $245 2 weeks
20201-032 6x6mm 2.0mm 44.3° 90° P/P THG@800nm Type1 $245 2 weeks
20201-033 10x10mm 0.02mm 44.3° 90° P/P THG@800nm Type1 $605 3 weeks
20201-034 10x10mm 0.05mm 44.3° 90° P/P THG@800nm Type1 $605 2 weeks
20201-035 10x10mm 0.1mm 44.3° 90° P/P THG@800nm Type1 $530 2 weeks
20201-036 10x10mm 0.2mm 44.3° 90° P/P THG@800nm Type1 $455 2 weeks
20201-037 10x10mm 0.5mm 44.3° 90° P/P THG@800nm Type1 $455 2 weeks
20201-038 10x10mm 1.0mm 44.3° 90° P/P THG@800nm Type1 $455 2 weeks
20201-039 10x10mm 2.0mm 44.3° 90° P/P THG@800nm Type1 $575 2 weeks
20201-040 10x10mm 2.5mm 44.3° 90° P/P THG@800nm Type1 $575 2 weeks
20201-041 10x10mm 5.0mm 44.3° 90° P/P THG@800nm Type1 $760 2 weeks
20201-042 7x7mm 6.0mm 47.6° 90° P/P 4HG@1064nm Type1 $560 2 weeks
20201-043 6x6mm 2.0mm 21.2° 90° P/P Type1 Phase Matching $245 2 weeks
20201-044 5x5mm 0.5mm 23.4° 90° P/P Type1 Phase Matching $245.0 2 weeks
20201-045 8x8mm 2.5mm 23.4° 90° P/P Type1 Phase Matching $395 2 weeks
20201-046 10x10mm 0.1mm 28.5° 90° P/P Type1 Phase Matching $530 2 weeks
20201-047 8x8mm 0.5mm 29° 90° P/P Type1 Phase Matching $350 2 weeks
20201-048 8x8mm 2.5mm 29° 90° P/P Type1 Phase Matching $395 2 weeks
20201-049 6x6mm 1.0mm 29.2° 90° P/P Type1 Phase Matching $245 2 weeks
20201-050 8x8mm 1.0mm 29.2° 90° P/P Type1 Phase Matching $350 2 weeks
20201-051 6x6mm 2.0mm 30° 90° P/P Type1 Phase Matching $245 2 weeks
20201-052 6x6mm 0.2mm 30.5° 90° P/P Type1 Phase Matching $245 2 weeks
20201-053 6x6mm 1.0mm 30.5° 90° P/P Type1 Phase Matching $245 2 weeks
20201-054 6x6mm 2.0mm 30.5° 90° P/P Type1 Phase Matching $245 2 weeks
20201-055 3x3mm 4.0mm 31.3° 90° P/P Type1 Phase Matching $245 2 weeks
20201-056 3x3mm 6.0mm 31.3° 90° P/P Type1 Phase Matching $245 2 weeks
20201-057 6x6mm 2.0mm 31.5° 90° P/P Type1 Phase Matching $245 2 weeks
20201-058 6x6mm 2.5mm 31.5° 90° P/P Type1 Phase Matching $245 2 weeks
20201-059 8x8mm 0.6mm 32° 90° P/P Type1 Phase Matching $350 2 weeks
20201-060 8x8mm 1.0mm 32° 90° P/P Type1 Phase Matching $350 2 weeks
20201-061 6x6mm 0.6mm 32.5° 90° P/P Type1 Phase Matching $245 2 weeks
20201-062 6x6mm 1.0mm 32.5° 90° P/P Type1 Phase Matching $245 2 weeks
20201-063 8x8mm 0.8mm 32.5° 90° P/P Type1 Phase Matching $350 2 weeks
20201-064 5x5mm 2.5mm 32.6° 90° P/P Type1 Phase Matching $245 2 weeks
20201-065 5x5mm 4.0mm 32.6° 90° P/P Type1 Phase Matching $275 2 weeks
20201-066 8x8mm 1.0mm 35° 90° P/P Type1 Phase Matching $350 2 weeks
20201-067 8x8mm 2.0mm 35° 90° P/P Type1 Phase Matching $350 2 weeks
20201-068 20x20mm 0.15mm 35° 90° P/P Type1 Phase Matching $1970 2 weeks
20201-069 20x20mm 0.2mm 35° 90° P/P Type1 Phase Matching $1970 2 weeks
20201-070 10x10mm 3.0mm 40.3° 90° P/P Type1 Phase Matching $575 2 weeks
20201-071 8x8mm 0.3mm 42.8° 90° P/P Type1 Phase Matching $350 2 weeks
20201-072 6x6mm 0.2mm 43° 90° P/P Type1 Phase Matching $245 2 weeks
20201-073 8x8mm 0.1mm 43° 90° P/P Type1 Phase Matching $395.0 2 weeks
20201-074 8x8mm 0.5mm 43° 90° P/P Type1 Phase Matching $350 2 weeks
20201-075 5x5mm 1.0mm 44° 90° P/P Type1 Phase Matching $245 2 weeks
20201-076 8x8mm 0.15mm 44.3° 90° P/P Type1 Phase Matching $350 2 weeks
20201-077 8x8mm 0.5mm 44.3° 90° P/P Type1 Phase Matching $350 2 weeks
20201-078 10x10mm 0.4mm 45.9° 90° P/P Type1 Phase Matching $455 2 weeks
20201-079 3x3mm 4.0mm 47.7° 90° P/P Type1 Phase Matching $245 2 weeks
20201-080 8x8mm 1.0mm 47.7° 90° P/P Type1 Phase Matching $350 2 weeks
20201-081 8x8mm 3.0mm 47.7° 90° P/P Type1 Phase Matching $440 2 weeks
20201-082 10x10mm 1.0mm 47.7° 90° P/P Type1 Phase Matching $455 2 weeks
20201-083 10x10mm 2.5mm 47.7° 90° P/P Type1 Phase Matching $575 2 weeks
20201-084 8x8mm 0.1mm 48° 90° P/P Type1 Phase Matching $395 2 weeks
20201-085 8x8mm 0.2mm 48° 90° P/P Type1 Phase Matching $350 2 weeks
20201-086 4x4mm 2.8mm 51.2° 90° P/P Type1 Phase Matching $245 2 weeks
20201-087 5x5mm 2.5mm 28° 30° P/P Type2 Phase Matching $245 2 weeks
20201-088 8x8mm 2.5mm 28° 30° P/P Type2 Phase Matching $395 2 weeks
20201-089 5x5mm 2.0mm 28.7° 30° P/P Type2 Phase Matching $245 2 weeks
20201-090 8x8mm 0.6mm 30° 30° P/P Type2 Phase Matching $350 2 weeks
20201-091 10x10mm 1.0mm 32° 30° P/P Type2 Phase Matching $575 2 weeks
20201-092 10x10mm 5.0mm 32° 30° P/P Type2 Phase Matching $760 2 weeks

Beta Barium Borate (or Beta BBO) Crystal, with the chemical formula BaB2O4, is a kind of negative uniaxial crystal with a trigonal structure. BBO crystal is one of the most prevalent nonlinear optical crystals. BBO crystal manifests outstanding optical features including its high nonlinear optical coefficient, stability over temperature changes, broad optical transmission range of 189-3500 nm, and a high damage threshold. What's more important, the advent of BBO crystals fills the shortage of nonlinear crystals that generate ultraviolet wavelengths, offering coverage for UV output which is not possible to be obtained with fundamental wavelengths. The crystal has a Second Harmonic Generation (SHG) coefficient 3-6 times larger than currently procurable ADP and KDP crystals in the near-infrared, visible, and ultraviolet spectrum. Its damage threshold is 15Gw/cm^2, which is 200% higher than that of KDP, and much higher than that of LiNbO3. In addition, its optical homogeneity (δn ≈10-6/cm) is also impressive.

These characteristics made Beta BBO crystals versatile for various NLO applications such as Harmonic Generations (e.g. SHG, THG, Fourth Harmonic Generation, Fifth Harmonic Generation), Optical Parametric Oscillations(OPO), Optical Parametric Amplifiers(OPA), and other applications in the field of Quantum Optics( quantum entanglement) and EO applications. 

Hangzhou Shalom EO offers off-the-shelf and customized BBO Crystals for nonlinear optical applications. Besides the advantages of high frequency conversion efficiencies, wide transmission spectrum, broad phase matching range, our BBO crystals feature the availability of large-dimension single crystals and low thermal-optical coefficients which promote thermal stability. The crystals are grown leveraging state-of-the-art fabrication techniques, which endows the BBO crystals with high optical homogeneity. Coating options are miscellaneous, including P-coating/ multi-layer V-coating/ single, dual-wavelength AR coating. The ultra-thin 0.01mm thickness with fused silica substrates and 0.05mm thickness free-standing BBO crystals are available For Femto-line Lasers, ultra-thin crystals are available, and the minimum thicknesses are 0.01mm (mounted with Fused Silica Substrates) and 0.05mm (Free-standing). Shalom EO also provides BBO crystals for Electro-Optic (EO) modulations, with high-precision polishing and Cr-Au electrodes furnished.


Shalom EO's BBO Crystals feature:

            • Broad phase-matching range from 409.6nm to 3500nm
            • Large-Dimension-capability, maximum aperture 20x20mm
            • Wide transmission spectrum from 190nm to 3500nm
            • Large effective second-harmonic-generation (SHG) coefficient
            • High optical homogeneity
            • Wide temperature bandwidth
            • High damage threshold


            The transmission rate and the tuning angles of second harmonic generation(SHG) of BBO crystals are shown in Fig.1 and Fig.2 separately below:

            BBO crystal transmission curve                                   BBO Crystal shg tuning angle

                                         Fig.1  Transmission Curve of BBO                                                                 Fig.2   Tuning Curves of Type 1 and Type 2 SHG


            Applications of BBO Crystals in the field of NLOs:

            1. BBO for Second, Third, Fourth, and Fifth Harmonic Generation of Nd: YAG Lasers:

            Exceptional conversion efficiencies could be achieved using BBO crystals, which are greater than 70% (SHG), 60% for THG, 50% for 4thHG. BBO crystal is the best option for 213nm 5HG.

            BBO crystals excel in handling intracavity SHG of Nd:YAG lasers with high power densities to generate 532nm output. And 263nm output with a decent power level could be attained using a Brewster-angle-cut BBO crystal when pumping the Nd:YAG Laser with an SHG output of a mode-locked Nd:YLF laser.

            Because of a small acceptance angle and large angular walk-off, good laser beam quality (small divergence, good mode condition, etc.) is the crucial factor for BBO to function better, tight focusing of laser beams is not suggested.

            2. BBO for Harmonic Generations of Other Tunable Lasers:

            • Ultra-fast Lasers:

            For SHG and THG of ultra-fast Lasers, BBO also exhibits a great advantage over KDP and ADP crystals.

            • Dye Lasers

            BBO crystal is an effective media for SHG of XeCl-laser pumped Dye lasers for producing output in the ultra-violet spectrum (205-310nm).

            • SHG/THG of Alexandrite Lasers and SHG/THG/FHG of Ti:Sapphire Lasers

            SHG/THG of Alexandrite Lasers UV output in the region 360nm-390 nm and output in the region 244nm - 259 nm. SHG/THG/FHG of Ti:Sapphire Lasers could also be realized efficiently.

            • Intracavity SHG of Argon Doped Lasers and SHG of Copper-Vapor Lasers

            Intracavity SHG of Argon Doped Lasers for UV and Deep-UV output, and SHG of Copper-Vapor Lasers for UV output.

            3. BBO for Optical Parametric Oscillation (OPO)/Optical Parametric Amplification (OPA):

            Utilizing BBO crystals for optical parametric oscillation(OPO) and parametric optical amplification (OPA), one could easily obtain tunable output in a broad wavelength range (from the UV to IR). Common applications include: 

            • OPO of 532nm pumped lasers for output ranging from 680 nm to 2400 nm

            our BBO Crystals could support OPO output of 532nm pumped laser with decent conversion efficiencies. 

            • OPO and OPA of 355nm Nd:YAG pumped lasers

            Using Shalom EO’s BBO, OPO of 355nm Nd:YAG pumped lasers could produce a wide tunable approximate wavelength range from UV to the MWIR spectrum, with promising conversion efficiencies.

            OPA of BBO crystals generates narrow-band, high power, and tunable (400 nm to 2000 nm) pulses for a pico-second Nd-YAG pumped laser. The approach is way better than using Dye Lasers in terms of efficiencies, tunable range, and maintenance.


            The Tuning Angles of Type 1 and Type 2 OPO and OPA at 532nm, 355nm, and 266nm are collected and illustrated in Fig. 3 and Fig. 4, respectively.

            bbo type 1 opo                                    bbo type 2 opo

             Fig.3 Type 1 BBO OPO Tuning Curves (@532/355/266nm)                                         Fig.4 Type 2 BBO OPO Tuning Curves (@532/355/266nm) 


            4. BBO Crystals for EO applications:

            BBO Crystals could be utilized for electro-optical modulations with their high laser-induced damage threshold (LIDT) and wide transmission range from 190nm to 3500nm. BBO Crystals are excellent candidates for high-repetition-rate Q-switching. We provide BBO Crystals for EO applications that are high-precision laser-grade polished and coated Cr-Au electrodes.

            Specifications:

            Dimension Tolerance (W±0.1mm)x(H±0.1mm) Clear Aperture central 90% of the diameter
            Scattering of Crystals

            No visible scattering paths or centers

            under the inspection of 50mW green Laser

            		 Flatness less than λ/8 @ 633nm
            Transmitting Wavefront Distortion less than λ/8 @ 633nm Chamfer ≤0.2mmx45°
            Chip ≤0.1mm Surface Quality better than 10/5 S/D (MIL-PRF-13830B)
            Parallelism ≤20 arc seconds Perpendicularity ≤5 arc minutes
            Angle Tolerance ≤0.25° Quality Warranty Period one year under proper use
            Mount Diameter 1" or Custom


            Chemical and Structural Properties:

            Crystal Structure Trigonal, space group R3c Lattics Parameters a=b=12.532Å, c=12.717Å, Z=6
            Melting Point About 1095℃ Mohs Hardness 4
            Density 3.85g/cm3 Thermal Conductivity 1.2W/m/K(┴c): 1.6W/m/K(//c)
            Thermal Expansion Coefficients a11=4x10-6/K; a33=36x10-6/K


            Optical and Nonlinear Optical Properties:

            Transparency Range 190-3500nm SHG Phase Matchable Range 409.6-3500nm(Type I) 525-3500nm(Type II)
            Therm-optic Coefficients(/°C) dno/dT=-16.6X10-6 dne/dT=-9.3X10-6 Absorption Coefficients <0.1%/cm at 1064nm <1%/cm at 532nm
            Angle Acceptance

            0.8mrad-cm (θ, Type I,1064 SHG)

            1.27mrad-cm (θ, Type II,1064 SHG)

            		 Temperature Acceptance 55℃-cm
            Spectral Acceptance 1.1nm-cm Walk-off Angle 2.7° (Type I 1064 SHG) 3.2° (Type II 1064 SHG)
            NLO Coefficients

            deff(I)=d31sinθ+(d11cosΦ-d22sin3Φ)cosθ

            deff(II)=(d11sin3Φ+d22cos3Φ)cos2θ

            		 Non-vanished NLO Susceptibilities d11=5.8xd36(KDP) d31=0.05xd11 d22<0.05xd11
            Sellmeier Equations(λ in μm )

            no2=2.7359+0.01878 / (λ2-0.01822) -0.01354

            λ2 ne2=2.3753+0.01224 / (λ2-0.01667) -0.01516 λ2

            		 Electro-optic Coefficients r22=2.7pm/V
            Half-wave Voltage 7KV (at 1064nm,3*3*20mm3) Resistivity >1011upohm-cm
            Relative Dielectric Constant εs11/εo:6.7 εs33/εo:8.1 Tan δ<0.001
            BBO 6x6x0.02mm for SHG@800nm Type 1

            BBO 6x6x0.02mm for SHG@800nm Type 1

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            BBO 5x5x2.0mm for Type2 Phase Matching

            BBO 5x5x2.0mm for Type2 Phase Matching

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            BBO 6x6x0.01mm for SHG@800nm Type 1

            BBO 6x6x0.01mm for SHG@800nm Type 1

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