CLBO Crystal
Non-linear crystal CLBO for frequency conversion of visible and near-IR laser radiation to the UV range
Cesium lithium borate crystal, CsLiB6O10 (CLBO), is a novel nonlinear optical borate crystal possessing excellent NLO properties in the UV range. Because of its good NLO properties, such as sufficient large nonlinear coefficient, short absorption edge, large values of angular, spectral, and temperature bandwidths, CLBO crystal is well suited for second and higher-order harmonic generation and an excellent material to produce UV and deep UV all-solid-state lasers. Its UV absorption edge reaches 180 nm. The effective nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about twice as large as that of KDP. CLBO crystals can be grown from the stoichiometric melt with lower viscosity.
All-solid-state ultraviolet lasers have been widely used in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of small volume, long life, high efficiency, good beam quality, wide tuning and narrow spectral line, etc. Utilizing high power near-infrared coherent light source as the fundamental frequency source based on nonlinear tuning technology, generating ultraviolet coherent radiation by multistage frequency conversion is regarded as an important way to develop the ultraviolet coherent light source. The key problem of ultraviolet coherent light source mainly focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is one of the conditions for frequency transformation, so the growth, size, damage resistance, conversion efficiency and allowable parameter range of nonlinear optical crystal are required more and more.
Parameter
| Chemical formula | CsLiB6O10 |
| Crystal structure | Tetragonal,Negative uniaxial crystal,42 m |
| Lattice constants | a=10.494Å,c = 8.939Å,Z=4 |
| Mass density | 2.461 g/cm3 |
| Moh hardness | 5.5 |
| Melting point | 1118 K |
| Molecular mass | 364.706 |
| Thermal conductivity | 1.25 W/m K |
| Property | Value |
| Transparency Range | 180-2750 nm |
| Absorption coefficient | 0.0013 cm−1 |
| Refractive Indices | |
| 1.064 μm | ne = 1.4340, no = 1.4838 |
| 0.532 μm | ne = 1.4445, no = 1.4971 |
| Sellmeier Equations(λ in μm) | no2 = 2.2104+0.01018/(λ2-0.01424)-0.01258λ2 |
| ne2 = 2.0588+0.00838/(λ2-0.01363)-0.00607λ2 | |
| Property | Value |
| NLO coefficients | deff(I)=d36sinθmsin(2φ) |
| deff(II)=d36sin(2θm)cos(2φ) | |
| Therm-Optic Coefficients | dno/dT=-1.9*10-6/℃ |
| dne/dT=-0.5*10-6/℃ | |
| Damage Threshold | 26 GW/cm2 |
| Wavelength(nm) | Phase Matching Angle(°) | Deff(pm/V) | Angle Tolerence(mrad·cm) | Walk-off Angle(°) |
| 532+532=266 | 61.7 | 0.84 | 0.49 | 1.83 |
| 1064+266=213 | 68.4 | 0.87 | 0.42 | 1.69 |
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| The calculation result of second-harmonic conversion efficiency as a function of input fundamental pulse energy | CLBO Transmittance Spectrum |
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| Refractive index dispersion | Phase-matching angle for typesIandII as a function of the wavelength of a fundamental wave |
- Its UV absorptionedge reaches 180 nm
- High effective nonlinear opticalcoefficient
- Largevalues of angular, spectral and temperature bandwidths
- High laser damage threshold
- Small discrete angle
- High frequency conversion efficiency
- Easy to grow big size single crystal
- Lowabsorption coefficient
- All-solid-state ultraviolet lasers
- Semiconductor lithography
- PCBdrilling
- Optical parametric oscillator
| CsLiB6O10 crystal：forth and fifth-harmonic generation in Nd:YAP laser |
| New nonlinear optical crystal: Cesium lithium borate |
| High efficiency 12.5 J second-harmonic generation from CsLiB6O10 nonlinear crystal by diode-pumped Nd:glass laser |
| All-solid-state laser system tunable in deep ultraviolet based on sum-frequency generation in CLBO |
| Generation of 5-W deep-UV continuous-wave radiation at 266 nm by an external cavity with a CsLiB6O10 crystal |
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| Crystal growth of CsLiB6O10 in adryatmo sphereandfromastoichiometric melt composition |
| Study on Ultra-precise Machining of CLBO Crystal |
| Growth and characterisation of CsLiB6O10 (CLBO) crystals |
| Caesium Lithium Borate: a New Nonlinear Optical Crystal |
| Flux growth of CsLiB6O10 crystals |
| Growth and characterization of large CLBO crystals |
| Cracking mechanism in CLBO crystals at room temperature |
| Widely tunable deep ultraviolet generation in CLBO |
| Effect of crystallinity on the bulk laser damage and UV absorption of CLBO crystals |
| Growth of a nonlinear optical crystal: cesium lithium borate |
| Top-seeded solution growth of CLBO crystals |
| High-power fourth- and fifth-harmonic generation of a Nd:YAG laser by means of a CsLiB6O10 |
| CW 198.5-nm light generation in CLBO |
| Electrical and dielectric properties of b-BaB2O4 (BBO) and CsLiB6O10 (CLBO) crystals |
| Long-term operation of CsLiB6O10 at elevated crystal temperature |
| CsLiB6O10 crystal for frequency doubling the Nd:YAG laser |
| Noncritically phase-matched second-harmonic generation in cesium lithium borate |
| Recent development of nonlinear optical borate crystals for UV generation |
| Growth and characterization of pure and Er-doped CsLiB6O10 single crystals |
| Tunable ultraviolet laser source based on solid-state dye laser technology and CsLiB6O10 harmonic generation |
| High-efficiency intracavity continuous-wave ultraviolet generation using crystals CsLiB6O10, β-BaB2O4 and LiB3O5 |
| Continuous-wave all-solid-state 244nm244nm deep-ultraviolet laser source by fourth-harmonic generation of an optically pumped semiconductor laser using CsLiB6O10CsLiB6O10 in an external resonator |
| Sum-frequency generation of femtosecond pulses in CsLiB6O10 down to 175 nm |
| High-power narrowband DUV laser source by frequency mixing in CLBO |
| Growth of CsLiB6O10 crystals with high laser-damage tolerance |
Luis E. Zapata says
We have an interest in 5mm aperture CLBO crystals for SHG 532–>266nm
and also, we may have a need for large aperture, ~30mm CLBO crystals for SFG 1064+532 –> 355nm, depending on price and availability.
Are these crystals available?
thank you,