CLBO

Technical Specifications

Custom specifications available upon request

Product Features

Our company can provide high-quality, large-size CLBO crystals. By precisely controlling the crystal growth environment and process parameters, we effectively suppress the effects of hygroscopicity, reduce internal inclusions and stress defects within the crystal, and significantly improve the crystal's optical uniformity and laser damage threshold. It is suitable for applications such as high-power Nd:YAG laser fourth-harmonic and fifth-harmonic generation, as well as deep ultraviolet laser-related optical parametric conversion.

Basic Characteristics

Physical Quantity	Value	Remarks
Crystal Structure	Tetragonal system	/
Lattice Parameters	a=b=10.494 Å, c=8.939 Å (1 Å=10⁻¹⁰ m), Room temperature	Room temperature
Symmetry	Z=4	—
Melting Point	Approx. 844.5 °C	/
Mohs Hardness	5.5	/
Density	2.461 g/cm³	Room temperature
Thermal Conductivity	1.25 W/m·K	Room temperature
Transmission Range	175 nm–2750 nm	/
Damage Threshold	26 GW/cm²	—
Thermo-optic Coefficients	dno/dT=-1.9×10⁻⁶/°C, dne/dT=-0.5×10⁻⁶/°C, Room temperature	Room temperature
Absorption Coefficient	266 nm UV:<0.05 cm⁻¹; 532–1064 nm Visible-NIR:<0.01 cm⁻¹	/
Refractive Index	1064nm: ne=1.4340, no=1.4838; 532nm: ne=1.4445, no=1.4971	—
Walk-off Angle	1.78°@1064nm, 1.83°@532nm, 0.98°@488nm	/
Angular Acceptance	0.5–1 mrad·cm (e.g. 266nm 4th harmonic)	/
Nonlinear Optical Coefficient	deff(I)=d₃₆ sinθₘ sin(2φ); deff(II)=d₃₆ sin(2θₘ) sin(2φ)	—
Sellmeier Equations	nₒ²=2.2104+0.01018/(λ²–0.01424)–0.01258λ²; nₑ²=2.0588+0.00838/(λ²–0.01363)–0.00607λ², 25°C	25°C

LBO Crystal Specification Parameters

Item	Specific Parameter
Dimensional Tolerance	(W±0.1mm)×(H±0.1mm)×(L+0.5/-0.1mm), custom sizes accepted
Clear Aperture	95% of central region diameter
Flatness	λ/6 @ 633 nm
Transmitted Wavefront Distortion	λ/8 @ 633 nm
Surface Finish	10/5 per MIL-PRF-13830B standard
Parallelism	20 arcsec
Perpendicularity	15 arcmin
Angular Deviation	Δθ ≤ 0.1°, Δφ ≤ 0.1°
Chamfer	≤ 0.2 mm × 45°
Edge Chipping	≤ 0.1 mm
Quality Guarantee Period	1 year under normal use

CLBO Curve Graphs

CLBO Transmittance Spectrum

Phase-Matching Angles of Type I and Type II vs. Fundamental Wavelength

Application Fields:

1. Semiconductor Industry.

CLBO crystals can achieve harmonic outputs at 193 nm and 266 nm, with a cutoff wavelength as low as 180 nm, making them ideal for semiconductor lithography and semiconductor inspection. In semiconductor lithography, the UV laser generated by CLBO enables fine patterning of chips, improving integration density and performance.

2. Materials Processing.

With high damage threshold and low absorption, and no two‑photon absorption, CLBO crystals are suitable for high‑power laser systems. Lasers derived from CLBO allow precise cutting, etching, or modification without damaging surrounding material—essential precision for industries such as electronics, e.g., processing tiny electronic components.

3. Bomedical Field.

The excellent efficiency of CLBO‑generated UV lasers makes them valuable in medical diagnostics. UV light penetrates tissue more deeply and provides higher clarity, delivering clearer and more detailed images for more accurate and timely diagnosis, such as detecting small tumors or vascular abnormalities.

4. UV Lidar Applications.

Thanks to its properties, CLBO is suitable for UV lidar systems used in target detection and environmental monitoring. The UV laser produced by CLBO enables more precise detection and identification.