Description
YCOB (YCa₄O(BO₃)₃) is a high-performance nonlinear optical crystal widely recognized for its excellent potential in ultraviolet (UV) and blue-green wavelength frequency multiplication. Comparable in nonlinear optical coefficient to BBO and LBO crystals, YCOB offers effective second and third harmonic generation (SHG and THG) capabilities, achieving up to 2.8× and 1.4× the conversion efficiency of KDP, respectively. Its advantages include large aperture size, high laser-induced damage threshold (2000–2500 GW/cm² in the femtosecond regime), broad angular and temperature acceptance, small dispersion, and short growth cycle using the Czochralski method.
YCOB’s stable physical and chemical characteristics (non-deliquescent) and excellent machinability make it highly reliable in demanding laser systems. It has been successfully demonstrated in generating 2.35 W CW green output at 532 nm from Nd:YVO₄ lasers and in THG at 355 nm for high-power pulsed systems. These attributes position YCOB as a preferred material for SHG, THG, OPO, OPA, OPCPA, and other nonlinear optical applications, especially in high-power and ultrafast laser systems.
YCOB Nonlinear Crystal
Specifications
Crystal Type: | BBO (Beta Barium Borate) |
---|---|
Phase Mathcing Type: | Not Applicable |
Mounting: | Unmounted |
Width: | 18 mm |
Height: | 18 mm |
Length: | 2 mm |
Flatness: | <= Lambda/10 |
Surface Quality (Scratch-Dig): | 20-10 |
Thermal Conductivity: | 2.6 W/m/K (||X), 2.33 W/m/K (||Y), 3.1 W/m/K (||Z) |
Deff (SHG, Type I, 1.0642µm ⇒0.5321µm): | 0.39 θ =90˚,Φ=35.3˚ (XY plane) |
Deff (SHG, Type I, 1.0642µm ⇒0.5321µm): | 0.78 θ =31.7˚,Φ=0˚ (XZ plane) |
Deff (SHG, Type I, 1.0642µm ⇒0.5321µm): | 1.36 θ =148.3˚,Φ=0˚ (XZ plane) |
Deff (SHG, Type I, 1.0642µm ⇒0.5321µm): | 1.14 θ =65˚,Φ=36.5˚ |
Features
- High Electric Resistivity: Ensures minimal energy loss and efficient optical performance.
- High Temperature Acceptance: Capable of operating under high-temperature conditions without degradation.
- High Laser-Induced Damage Threshold: Withstands high power laser operations, making it suitable for intense applications.
- Less Anisotropy: Provides uniform optical properties in different directions, enhancing performance consistency.
- Small Thermal Expansion Coefficient: Maintains structural integrity and optical performance over varying temperatures.
- Less Parametric Luminescence: Reduces undesired luminescent effects, improving signal clarity.
- SHG (Second-Harmonic Generation) & THG (Third-Harmonic Generation): Efficiently converts laser frequencies for various optical applications.
- OPO (Optical Parametric Oscillator): Utilized in generating tunable laser outputs across a wide spectrum.
- OPA (Optical Parametric Amplification): Amplifies optical signals for enhanced output power.
- OPCPA (Optical Parametric Chirped-Pulse Amplification): Delivers high-energy pulses with precise control for advanced applications.
- Piezoelectric Acceleration Sensors: Suitable for use in sensors due to its piezoelectric properties.
Applications
- Second-Harmonic Generation (SHG): Efficient doubling of fundamental laser wavelengths.
- Third-Harmonic Generation (THG): Produces UV wavelengths from visible laser sources.
- Optical Parametric Oscillation (OPO): Tunable wavelength generation for spectroscopy and sensing.
- Optical Parametric Amplification (OPA): Boosts weak optical signals for ultrafast applications.
- Optical Parametric Chirped-Pulse Amplification (OPCPA): Delivers few-cycle pulses with high peak power.
- Piezoelectric Acceleration Sensors: Utilizes piezoelectric properties for precision measurement.
Frequently Asked Questions
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