YCOB (Yttrium Calcium Borate Oxyborate) Crystal
Keywords:
Laser Crystals
Magneto-Optic Crystals
Scintillation Crystals
- Product Introduction
- Key advantages
- Application areas
- Product Features
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- Commodity name: YCOB (Yttrium Calcium Borate Oxyborate) Crystal
YCOB (Yttrium Calcium Borate Oxyborate) Crystal, with the chemical formula YCa₄O(BO₃)₃, is a multifunctional composite crystal that combines strong nonlinear optical properties with high-temperature piezoelectric characteristics. It belongs to the ReCOB family and adopts a monoclinic crystal structure. Stable at room temperature and non-hygroscopic, YCOB can be grown into large-size single crystals using the Czochralski method.
Product Introduction
YCOB (Yttrium Calcium Borate Oxyborate) Crystal, with the chemical formula YCa₄O(BO₃)₃, is a versatile composite crystal that combines strong nonlinear optical properties with high-temperature piezoelectric characteristics. Belonging to the ReCOB family, it features a monoclinic crystal structure, remains stable at room temperature, and is non-hygroscopic—making it easy to handle. This material can be grown into large-size single crystals using the Czochralski method. YCOB boasts nonlinear optical coefficients comparable to those of LBO and BBO crystals, along with exceptional physicochemical stability (non-hygroscopic behavior) and excellent machinability. Moreover, its single crystals can be efficiently produced via the Czochralski technique in relatively short growth cycles, making it one of the most extensively studied nonlinear optical crystals today. Notably, since yttrium (Y) can be substituted in any proportion with most rare-earth activating ions, YCOB simultaneously exhibits both laser and nonlinear optical properties, positioning it as an ideal candidate for use as a self-frequency-doubling crystal in laser applications.
Key Advantages
- High-Temperature Piezoelectric
- Excellent mechanical properties: High hardness and crack resistance make it the ideal material for high-power laser applications.
- Low anisotropy and small thermal expansion coefficient
- High optical quality with a wide transmission range (from ultraviolet light—approximately 200 nm—to mid-infrared light—about 4 µm)
- Wide phase-matching range, high damage threshold, and non-hygroscopic
- Tissue culture grows quickly, requires low costs, and has a short growth cycle.
- High thermal stability: Maintains consistent optical performance across a wide temperature rangeApplication Areas
- SHG (Second-Harmonic Generation)
-THG (Third-Harmonic Generation)
-OPO (Optical Parametric Oscillator)
- OPA (Optical Parametric Amplification)
- OPCPA (Optical Parametric Chirped Pulse Amplification)
- Piezoelectric Acceleration Sensor
- High-energy Laser Systems and Precision Laser ApplicationsProduct Features
Basic Material Properties
Chemical Formula
YCa₄O(BO₃)₃
Crystal Structure
Monoclinic; Point Group m
Density
3.31 g/cm³
Mohs Hardness
6~6.5 Mohs
Melting Point
1510 °C
Transmittance
T>85%@200nm–2500nm
Nonlinear Optics
d22≈5.4–6.0pm/V(@1064nm); Type I SHG phase matching covers approximately 0.41–3.5µm
Damage Threshold
On the order of GW/cm², suitable for both high average power and ultra-high peak power applications
High-Temperature Piezoelectric / Electrical
No phase transition occurs from room temperature up to near the melting point; at 800 °C, the resistivity is approximately 2.0×10^8 Ω·cm, and at 1000 °C, it exceeds 1.0×10^7 Ω·cm.
Growth Method
Czochralski Method
Product Processing Indicators
Dimensional Tolerance
±0.05 mm
Planarity (PV)
≤λ/8@633 nm
Parallelism
30″
Perpendicularity
≤15′
Effective Aperture
≥90%
Surface Quality
10-5
Chipped edge
≤0.1 mm
Custom film system services available
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- Strong electro-optic effect: Ideal for high-speed optical modulation.
- High dielectric constant: Beneficial for surface acoustic wave and ultrasonic sensor applications.
- Excellent thermal stability: Suitable for high-temperature environments.
- Wide optical transparency range: Exhibits excellent light transmission across wavelengths from ultraviolet to mid-infrared.
- High sensitivity
- Wide range of transparency
- Not easily deliquescent -
- Optical communication: Used in electro-optic modulators and optical switches.
- Precision sensing: Applied in accelerometers, temperature sensors, and more.
- Laser technology: Used in laser frequency doublers, modulators, and more.
- Medical devices: Piezoelectric sensors used in ultrasound equipment.
- Surface acoustic wave devices: such as wireless filters and delay lines.
- Optical storage, transient recording
- High-speed holographic camera -
Material Properties Lattice constant a = 5.154 Å, c = 13.783 Å Density 7.45g/cm3 Color Colorless Mohs Hardness 5.5–6 on the Mohs scale Through the range 400–5000 nm Resistivity 1015wm
Dielectric constant es11/e0:39~43 es33/e0:42~43 et11/e0:51~54 et33/e0:43~46 Coefficient of thermal expansion aa = 1.61 × 10⁻⁶/K, ac = 4.1 × 10⁻⁶/K Refractive index no = 2.176, ne = 2.180 (@633 nm) Electro-optic coefficient r33 = 30.4 pm/V Heat Capacity (Cp) 100 J/k.mol Curie Temperature 610°C Melting point 1650°C Product Processing Metrics Effective Aperture >90% Dimensions Customized to customer specifications Diameter Tolerance +0 / -0.05 mm Dimensional Tolerance ±0.05 mm Protective Chamfer ≤0.2 × 45° Surface finish 10-5 S-D Flatness ≤λ/6 @ 632.8 nm Parallelism <20" Verticality ≤15′ Chipped edge < 0.1 mm Coating Customized to customer specifications
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