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) |
Cesium Lithium Borate (CLBO), chemical composition CsLiB6O10, is a nonlinear optical crystal highly valued in ultraviolet (UV) and deep-ultraviolet (DUV) applications because of its exceptional optical properties. CLBO offers a wide transmission wavelength range from approximately 180 nm to 2,300 nm, making them ideal for generating UV and DUV lasers. CLBO crystals have a relatively high nonlinear optical coefficient, which enables them to efficiently convert the frequencies of infrared lasers into shorter UV wavelengths through second, third, fourth, and even fifth harmonic generation. Additionally, CLBO exhibits a very high laser damage threshold, allowing it to withstand the high intensities often required in UV laser systems without suffering from optical damage. The crystal also features broad temperature and angular acceptance bandwidths, meaning it is easier to align and remains more stable under varying operating conditions compared to many other nonlinear crystals.
One of the major reasons CLBO is preferred as UV optics is its excellent performance in generating deep-UV light. It can produce wavelengths as short as 180–210 nm, which is particularly important for applications such as semiconductor photolithography, deep-UV spectroscopy, and high-resolution biomedical imaging. Compared to other nonlinear crystals like Beta Barium Borate (BBO), CLBO offers higher optical transmission below 200 nm and a lower walk-off angle, helping to maintain better beam quality during nonlinear frequency conversion processes.
Hangzhou Shalom EO is a professional supplier of custom CLBO crystals for UV applications, offering crystal ingots, blanks, and polished or coated crystals tailored to diverse application requirements. CLBO crystals are available in a wide range of custom specifications, with options for various dimensions, orientations, and protective treatments. Given the highly hygroscopic nature of CLBO, Shalom EO treats every crystal with particular caution throughout the manufacturing and packaging processes. Leveraging decades of technical experience, the company has developed a unique technique for processing and polishing CLBO crystals under minimized humidity conditions, preventing deliquescence and preserving the optical quality of the material. This cutting-edge production method, which precisely controls environmental moisture levels, ensures that the crystals retain their integrity throughout manufacturing.
Thanks to this specialized know-how in precision polishing and moisture-controlled processing, Shalom EO delivers CLBO crystals with tight geometric control, high surface quality, and excellent performance. The crystals can also be supplied with anti-reflection (AR) coatings, protective coatings, or mounted in sealed housings to further enhance their durability and usability in demanding environments. Shalom EO’s cesium lithium borate (CLBO) crystals are recognized for their precise control over critical parameters and for achieving maximized conversion efficiencies, excelling as a nonlinear UV material for high-power lasers such as 193 nm excimer lasers and advanced UV optical systems.
