LBO Crystal
LBO is one of the excellent non-linear crystals in the ultraviolet band. It has been successfully used in second and third-harmonic generations of YLF, YAG, and YAP lasers. LBO crystal has a wide transmission band, good ultraviolet transmittance, slight deliquescence, good physical and chemical properties, moderate non-linear optical coefficient, good optical uniformity, high damage threshold, large allowable angle, and small walk-off angle. It has been widely used in high average power second harmonic, sum frequency, difference frequency, third harmonic, fourth harmonic, and parametric oscillation fields.
LBO crystal — the most excellent nonlinear crystal for Noncritical Phase Matched laser frequency doubling
The greatest advantage of LBO is that temperature tuning can achieve non-critical phase matching (NCPM). When the non-critical phase matching relationship is satisfied in the frequency doubling process, the walk-off angle between the fundamental frequency light and the second harmonic of frequency doubling is 0.
At this time, the effective length of an LBO crystal can theoretically reach infinity, which can compensate for its small non-linear coefficient. Because its damage threshold is very large, high-power fundamental wave pumping can be achieved.
Therefore, the conversion efficiency of fundamental frequency light will be greatly improved by using the non-critical phase matching of LBO crystal for the extra-cavity frequency doubling of a pulsed laser. The beam quality and stability of frequency light will be greatly improved.
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Parameter
Chemical and Physical Properties
| Property | Value |
| Chemical formula | LiB3O5 |
| Crystal structure | Orthorhombic, Space group Pna21, Point group mm2 |
| Lattice Parameter | a=8.4473Å ,b=7.3788Å, c=5.1395Å, Z=2 |
| Mass density | 2.47 g/cm3 |
| Moh hardness | 6 |
| Melting point | About 834°C |
| Thermal conductivity | 3.5W/m/K |
| Birefringence | Negative biaxial crystal: 2Vz = 109.2˚ at λ = 0.5321μm |
| Property | Value |
| Transparency Range | 169 – 2600 nm |
| Absorption Coefficient: | <0.1%/cm at 1064nm;<0.3%/cm at 532nm |
| Refractive Indices | |
| at 1.0642 mm | nx = 1.5656, ny = 1.5905, nz=1.6055 |
| at 0.5321 mm | nx = 1.5785, ny = 1.6065, nz=1.6212 |
| at 0.2660 mm | nx = 1.5973, ny = 1.6286, nz=1.6444 |
| Sellmeier Equations(λ in μm) | nx2=2.454140+0.011249/(λ2-0.011350)-0.014591λ2-6.60×10-5λ4 |
| ny2=2.539070+0.012711/(λ2-0.012523)-0.018540λ2+2.0×10-4λ4 | |
| nz2=2.586179+0.013099/(λ2-0.011893)-0.017968λ2-2.26×10-4λ4 |
| Property | Value |
| SHG Phase Matchable Range | 551 ~ 2600nm (Type I);790-2150nm (Type II) |
| NLO coefficients | deff(I)=d32cosΦ (Type I in XY plane) |
| deff(I)=d31cos2θ+d32sin2θ (Type I in XZ plane) | |
| deff(II)=d31cosθ (Type II in YZ plane) | |
| deff(II)=d31cos2θ+d32sin2θ (Type II in XZ plane) | |
| Non-vanished NLO susceptibilities | d31=1.05 ± 0.09 pm/V |
| d32=-0.98 ± 0.09 pm/V | |
| d33= 0.05 ± 0.006 pm/V | |
| Therm-Optic Coefficients(°C,λ in μm) | dnx/dT=-9.3X10-6 |
| dny/dT=-13.6X10-6 | |
| dnz/dT=(-6.3-2.1λ)X10-6 | |
| Angle Acceptance | 6.54mrad-cm (Φ, Type I,1064 SHG)15.27mrad-cm (q, Type II,1064 SHG) |
| Dimension/mm | Length/mm | Application | Orientation Theta/Phi deg |
AR Coatings S1/S2,nm/nm |
| 5 x 5 | 15 | [email protected], Type II (e-oe) | 42.2/90 | 1064 + 532 / 355 |
| 15 | [email protected], Type I (e-oo) | 90/11.6 | 1064 + 532 / 1064 + 532 | |
| 6 x 6 | 0.9 | [email protected] | 90/13.8 | 515 + 1030 / 515 + 1030 |
| 1.9 | [email protected] | 90/13.8 | 515 + 1030 / 515 + 1030 | |
| 2.8 | [email protected] | 90/13.8 | 515 + 1030 / 515 + 1030 | |
| 3.7 | [email protected] | 90/13.8 | 515 + 1030 / 515 + 1030 | |
| 10 x 10 | 0.9 | [email protected] | 90/13.8 | 515 + 1030 / 515 + 1030 |
| 1.9 | [email protected] | 90/13.8 | 515 + 1030 / 515 + 1030 | |
| 2.8 | [email protected] | 90/13.8 | 515 + 1030 / 515 + 1030 | |
| 3.7 | [email protected] | 90/13.8 | 515 + 1030 / 515 + 1030 | |
| 3 x 3 | 10 | [email protected], Type II (e-oe) | 42.2/90 | 1064 + 532 / 355 |
| 15 | [email protected], NCPM I Type | 90/0 | 1064 + 532 / 1064 + 532 | |
| 15 | [email protected], Type II (e-oe) | 42.2/90 | 1064 + 532 / 355 | |
| 15 | [email protected], Type I (e-oo) | 90/11.6 | 1064 + 532 / 1064 + 532 | |
| 20 | [email protected], NCPM I Type | 90/0 | 1064 + 532 / 1064 + 532 |
| Property | Value |
| Orientation Tolerence | < 0.5° |
| Thickness/Diameter Tolerance | ±0.05 mm |
| Surface Flatness | <λ/[email protected] nm |
| Wavefront Distortion | <λ/[email protected] nm |
| Surface Quality | 10/5 |
| Parallel | 30〞 |
| Perpendicular | 15ˊ |
| Clear Aperture | >90% |
| Chamfer | <0.2×45° |
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| LBO Transmission Spectrum | SLBO-Nonlinear-Crystal-Phase-Mismatching-Angle-Spectrum-Laser-Crylink |
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| OPO tuning curves of LBO (TypeI (ooe) in ‘XY’ plane) with different pump light, namely 530 nm, 355 nm and 266 nm | |
Case
Feature
Application
Reference
News
Case
LBO nonlinear crystal case (1)
Size: 3×3×10 mm;
2-side polishing;
Uncoated
LBO nonlinear crystal case (2)
Dimensions, mm: 3 × 3 (+0/-0.1);
2-side polishing (3×3 mm);
Coatings: AR @ 1064 + 532 nm/355 nm;
Laser induced damage threshold: >10 J/cm² @ 1064 nm, 10 ns, 10 Hz
LBO nonlinear crystal case (3)
Size: 3×3×10 mm, 3×3×20 mm, 3×3×30 mm;
2-side polishing（3*3 mm);
Coating: S1/S2, AR/[email protected] –1180 nm&530 -590nm on both side
LBO nonlinear crystal case (4)
Size: 3×3×15 mm;
SHG 640 nm / 320 nm
LBO nonlinear crystal case (5)
Size: 3×3×6 mm;
Coating: S1/S2: AR @ 532 nm + AR @ 690-990 nm
LBO nonlinear crystal case (6)
Size: 6×6×0.9 mm;
Coatings: AR @ 1030 + 515 nm/ 1030 + 515 nm
Feature
- Low sensitivity to moisture
- Dispertive angle is small
- High optical homogeneity
- The range of tunable wavelengths is large
- The region of transparency is wide
- Damage threshold is high
- Wide acceptance angle
Application
- Material Processing
532nm laser
355nm laser - Optical Communication
532nm laser
457nm laser - Medical Applications
1300nm laser
1064nm/532nm)laser - OPA(Optical parametric amplifiers) and OPO(oscillators)
- SHG(Frequency harmonic doubling) and THG(Tripling harmonic doubling)
- Diode laser pumped Nd: YLF laser and Nd:YAG laser. Alexandrite, Ti:Sapphire, Dye Lasers, Ultrashort Pulse Lasers
Reference
| High-power nanosecond optical parametric oscillator based on a long LiB3O5 crystal Optics Communications 232 (2004) 411–415 |
| Effect of highest temperature invoked on the crystallization of LiB3O5 from boron-rich solution Journal of Crystal Growth 249 (2003) 502–506 |
| Nucleation, growth and characterization of LiB3O5 single crystals Journal of Crystal Growth 275 (2005) e769–e774 |
| Sub-nanosecond time-resolved spectroscopy of LiB3O5 under synchrotron radiation Journal of Luminescence 72-74 (1997) 703-704 |
If you can’t find the Literature you want, Contact us to get the PDF Get the Literature
| Reinvestigation on the phase transition of a LiB3O5 crystal near its melting point Journal ofCrystalGrowth435(2016)1–5 |
| The optical properties of planar waveguides in LiB3O5 crystals formed by Cu+ implantation Applied Surface Science 253 (2006) 2674–2677 |
| Growth and nonlinear optical properties of Zn-doped LiB3O5 crystals Optical Materials 43 (2015) 6–9 |
| Copper-doped lithium triborate (LiB3O5) crystals A photoluminescence, thermoluminescence, and electron paramagnetic resonance study Journal of Luminescence 194 (2018) 700–705 |
| LiB3O5 crystal structure at 20, 227 and 377°C Journal of Solid State Chemistry 178 (2005) 2987–2997 |
| Growth and morphology of large LiB3O5 single crystals Journal ofCrystalGrowth331(2011)1–3 |
| Peculiarities of LiB3O5 crystallization from melts studied by Raman spectroscopy Journal of Crystal Growth 310 (2008) 3540– 3544 |
| Dynamics of electronic excitations and localized states in LiB3O5 Journal of Luminescence 76&77 (1998) 464-466 |
| The thermoluminescent properties of lithium triborate (LiB3O5) activated by aluminium Nuclear Instruments and Methods in Physics Research B 266 (2008) 755–762 |
| High-pressure synthesis and crystal structure of the lithium borate HP-LiB3O5 Journal ofSolidStateChemistry184(2011)2490–2497 |
| Structural nature of 7Li and 11B sites in the nonlinear optical material LiB3O5 using static NMR and MAS NMR Materials Chemistry and Physics 147 (2014) 644-648 |
| Anisotropic properties of self-flux grown LiB3O5 single crystals Solid State Communications 136 (2005) 215–219 |
| Thermally stimulated luminescence and lattice defects in crystals of alkali metal borate LiB3O5 (LBO) Radiation Measurements 33 (2001) 577–581 |
| Investigations on the growth of LiB3O5 crystal by top-seeded solution growth technique Journal of Crystal Growth 263 (2004) 327–331 |
| Structural studies of lithium triborate (LBO–LiB3O5) in borophosphate glass-ceramics International Journal of Inorganic Materials 3 (2001) 829–838 |
News
LBO crystals crylink have supplied
| Size (mm) | Type | Angle | Coating |
| 3x3x10 | typeⅠ(1430 — 715） | theta=90 phi=2.5 | |
| 3x3x10 | typeⅠ(1470 —735） | theta=90 phi=5.4 | |
| 3x3x10 | typeⅠ(1064+532— 355） | theta=90 phi=37.2 | AR/[email protected]+532nm/355nm |
| 3x3x10 | typeⅡ(1064+532— 355） | theta=42.2 phi=90 | |
| 3.5×3.5×7 | typeⅠ(1064 —532） | theta=90 phi=11.3 | AR/[email protected]/532nm |
| 4x4x20 | typeⅠ(739 — 369.5） | theta=90 phi=38.2 | AR/[email protected]/369.5nm |
| 4x4x20 | typeⅠ(846 — 423） | theta=90 phi=27.2 | AR/[email protected]/423nm |
| 6x6x0.9 | typeⅠ(1030 — 515） | theta=90 phi=13.8 |
Size: 3.5×3.5×7 mm
Type: typeⅠ (1064nm —532nm)
Angle: theta=90 phi=11.3
Coating: [email protected]/532nm
Size: 3×3×10mm
Type: typeⅡ (1064+532 —355)
Angle: theta=42.2 phi=90
Size: 3×3×10mm
Type: typeⅠ (1064+532 —355)
Angle: theta=90 phi=37.2
Coating: [email protected]+532nm/355nm
Laser induced damage threshold: >10J/[email protected],10ns,10HZ
Size: 3×3×10mm
Angle: theta=90 phi=2.5
Type: typeⅠ (1470 —935)
Size: 4×4×20mm
Type: typeⅠ (739 — 369.5)
Angle: theta=90 phi=38.2
Coating: AR/[email protected]/369.5nm
Size: 3×3×10mm
Angle: theta=90 phi=2.5
Type: typeⅠ (1430 —915)
Size: 4×4×20mm
Type: typeⅠ (846 — 423)
Angle: theta=90 phi=27.2
Coating: AR/[email protected]/423nm
Size: 6×6×0.9 mm
Type: typeⅠ (1030 — 515)
Angle: theta=90 phi=13.8
Size: 4×4×20mm
Type: typeⅠ (846 — 423)
Angle: theta=90 phi=27.2
Coating: AR/[email protected]/423nm
Size: 3×3×10mm
Type: typeⅠ (1064+532 —355)
Angle: theta=90 phi=37.2
Coating: [email protected]+532nm/355nm
Laser induced damage threshold: >10J/[email protected],10ns,10HZ
Size: 4×4×20mm
Type: typeⅠ (739 — 369.5)
Angle: theta=90 phi=38.2
Coating: AR/[email protected]/369.5nm
Size: 3.5×3.5×7 mm
Type: typeⅠ (1064nm —532nm)
Angle: theta=90 phi=11.3
Coating: [email protected]/532nm
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