Specifications:
| Width Tolerance | ±0.1mm | Height Tolerance | ±0.1mm |
| Length Tolerance | +0.5mm/-0.1mm (L≥2.5mm) +0.1mm/-0.1mm (L<2.5mm) |
Clear Aperture (Central of Diameter) | 90% |
| Surface Flatness (@633nm) | ≤lambda/6 | Parallelism | 20” |
| Surface Quality (MIL-PRF-13830B) | 10/5 S/D | Damage Threshold | >150 MW/cm^2 @266nm, 10ns, 10Hz (With AR Coating) >300 MW/cm^2 @532nm, 10ns, 10Hz (With AR Coating) |
| Perpendicularity | ≦15’ | Angle Tolerance | Δθ≦0.25°, ΔФ≦0.25 ° |
| Chamfer | ≦0.2 mm × 45 ° | Chip | ≦0.1 mm |
Basic Properties:
| Chemical and Structural Properties | |||
| Chemical Formula | CsLiB6O10 | Crystal Structure | Tetragonal, Space group Ⅰ 42m |
| Lattice Constants | a = b = 10.494 Å, c = 8.939 Å | Symmetry | z=4 |
| Melting Point | Around 844.5° | Density | 2.461 g/cm3 |
| Molecular Mass | 364.706 | ||
| Optical and Nonlinear Optical Properties | |||
| Transmission Wavelength Range | 180-2750nm | Walk-off Angle | 1.78 °at 1064nm; 1.83 °at 532nm; 0.98 °at 488nm |
| Effective NLO Coefficients | 1.01 pm/V at 532nm; 1.16 pm/V at 488nm; 0.95 pm/V at 1064nm |
NLO Coefficients | deff (Ⅰ) = d36 sinθmsin(2 Ф) ; deff (Ⅱ) = d36 sin(2θm) sin(2 Ф) |
| Angle Acceptance | 1.02 mrad·cm at 1064 nm; 0.49 mrad·cm at 532 nm; 0.84 mrad·cm at 488 nm |
Temperature Acceptance | 9.4℃·cm |
| Spectral Acceptance | 7.03 nm·cm at 1064 nm; 0.13 nm·cm at 532 nm; 0.09 nm·cm at 488 nm |
Sellmeier Equations (λ in μm) | CLBO at 20 ℃ no2 = 2.2104 + 0.01018 / (λ2 - 0.01424) - 0.01258 λ2 ne2 = 2.0588 + 0.00838 / (λ2 - 0.01363) - 0.00607 λ2 (0.1914 µm<λ<2.09 µm) |
CLBO Crystals, full name Cesium Lithium Borate, chemical formula CsLiB6O10 with a tetragonal crystals structure is a novel nonlinear optical (NLO) crystal material that stands out with its excellent performance in UV, vacuum UV (VUV), and deep UV (DUV) wavelength range.
The optical response range of CLBO crystals is extensive, with a UV absorption edge as low as 180nm and an IR absorption edge at 2750nm, enabling nonlinear frequency conversion across a wide spectrum. The broad response range of CLBO crystals in combination with the high nonlinear optical coefficient makes CLBO crystals ideal for second, fourth, and fifth harmonic generation (SHG, FOHG, and FIHG) of Nd:YAG lasers or other lasers doped with Nd ions, generating laser output of DUV or VUV wavelengths such as 193nm or 266nm. CLBO crystals work well for second harmonic generation and third harmonic generation (SHG, THG) of Ti:sapphire and Alexandrite lasers.
In addition, CLBO crystals exhibit other advantages, including larger spectral and temperature acceptance, increased angular tolerance, and higher SHG conversion efficiencies when compared with BBO crystals. This implies that as a nonlinear optical crystal, CLBO can convert incident light with higher efficiencies over a wide angle range and maintain good nonlinear functionalities under temperature changes. CLBO crystal also has a small walk-off angle and shows moderate birefringence, which is beneficial for maintaining beam quality during harmonic generation and conducive to the simplification of the optical system. It is worth mentioning that the nonlinear coefficient deff is almost times that of KDP crystal, which makes clbo crystals perform well in nonlinear optical applications. Besides, CLBO crystals have the appealing characteristic of a high laser damage threshold, accommodating to high power solid-state UV lasers.
As a recent advent nonlinear UV crystal material, cesium lithium borate crystals emerge as an attractive candidate with its excellence for harmonic generations and other nonlinear optical conversion applications in a wide range of professional realms, including UV laser generation, semiconductor inspection, micro-photolithography, bio-medical, UV-LiDAR, etc.
Hangzhou Shalom EO is a professional supplier of custom CLBO crystals in the form of crystal ingots, blanks, and polished/coated crystals. CLBO crystals are available in a range of custom specifications to meet diverse application requirements. Since CLBO crystals are very hygroscopic, all the clbo crystals are treated with caution during the manufacturing and packaging procedure. Our special know-how is the processing and polishing of CLBO crystals with tight geometric control and high precision. For the manufacturing and polishing stage of the clbo crystals, because the crystals are prone to deliquesce, we have established a unique technique for processing CLBO crystals with minimized humidity. This cutting-edge production technique controlling the environmental moisture level enables Shalom EO to process cesium lithium borate crystals without degrading their quality. The crystals are also available as versions sealed in housings, or coated in AR coating/protective coatings, where crystals can be offered in various dimensions and orientations.
With decades of technical experience and state-of-the-art crystal growth, manufacturing, and inspection measures, Shalom EO ensures precise control over CLBO crystal parameters and offers maximized conversion efficiencies. Shalom EO’s cesium lithium borate (CLBO) crystals excel as a nonlinear uv crystal material for high-power lasers such as 193nm excimer lasers or advanced UV optical applications.
Comparison Chart of The Nonlinear Optical Properties of CLBO and BBO Crystals:
| Input and Output Wavelength | Nonlinear Crystal | NLO Coefficients (Deff) | Phase Matching Angle | Angle Tolerance | Spectral Acceptance | Temperature Acceptance | Walk-off Angle |
| 532nm+532nm=266nm | CLBO | 0.84 (pm/V) | 61.7° | 0.49 mrad·cm | 0.13 nm·cm | 8.3 °C·cm | 1.83° |
| BBO | 1.32 (pm/V) | 47.7° | 0.17 mrad·cm | 0.07 nm·cm | 4.5 °C·cm | 4.80° | |
| 1064nm+266nm=213nm | CLBO | 0.87 (pm/V) | 68.4° | 0.42 mrad·cm | 0.16 nm·cm | 4.6 °C·cm | 1.69° |
| BBO | 1.26 (pm/V) | 51.1° | 0.11 mrad·cm | 0.08 nm·cm | 3.1 °C·cm | 5.34° |
Applications of CLBO (Cesium Lithium Borate Crystals):
Shalom EO's CLBO crystals are ideal for a wide range of application contexts:
